Online Test

Question # 1

All living organisms are formed of basic units called

Choose an answer

Atoms and sub-atomic particles

Cells

Tissues

Organs

Oomycetes show close relation with fungi and their cell wall contains

Choose an answer

Cellulose

Chitin

Silica

Muramic acid

Fungi are different from animals because they

Choose an answer

Have cell wall

Are absorptive heterotrophs

Are non-motile

All of the above

Parasitics protozoans that form sopres at some stage in their life cycle belong to the group

Choose an answer

Ciliates

Actinopods

Diatoms

Apicomplxans

Which of the following is true about mammals

Choose an answer

They have right aortic each only

They have left aortic each only

They have left and right aortic arches

They do not have aortic each

Biological name of corn is

Choose an answer

Allium cepa

Cassia fistula

Solanum melangena

Zea mays

These are uniccellular organisms with a flexible outer covering

Choose an answer

Flagellates

Ciliates

Foraminiferans

Actinopods

...... are highly evolved of all the plants on earth

Choose an answer

Bryophytes

Pteridophytes

Angiosperms

Gymnosperms

Fungi algae protozoa and various other prokaryotes are

Choose an answer

7.4%

19.9%

17.6%

9.4%

As the pressure potential of the cell increases due to endosmosis the cell becomes

Choose an answer

Flaccid

Turgid

Flabby

Limp

During exercise the breathing rate may rise to

Choose an answer

30 times per minute

20 times per minute

25 times per minute

35 times per minute

Which one of the following is not a viral disease

Choose an answer

Cowpox

Mumps

Tetanus

Small pox

Thick walled enlarge vegetative cells which accumulate food and become resting cells in nostoc are

Choose an answer

Heterocysts

Akinetes

Cysts

Spores

Coelom is filled with fluid called

Choose an answer

Salty fluid

lymphatic fluid

Coelomic fluid

Organic fluid

Polysiphonia is a representative of

Choose an answer

Green algae

Brown algae

Red algae

Diatoms

In the five kingdom system of classification of Robert Whittacker, the members of kingdom plantae are autotrophic, eukaryotic and

Choose an answer

Multicellular

Motile

Either unicellular or multicellular

Have sexual reproduction

In grazing and browsing herbivores i.e deer and sheep there are no upper

Choose an answer

Molars

Premolars

Incisors

Canines

The optimum pH of chymotrypsin is

Choose an answer

7.00-8.00

6.00-7.00

5.00-6.00

4.00-5.00

Protandrous means

Choose an answer

Male sex cells develop first

Male and female sex develop simultaneously

Female sex cell develop first

None of the above

Ribosomes are chemically composed of

Choose an answer

Only protein

Only DNA

Only RNA

Both a and c

There are tree sites of digestion in the disestive system i.e oral cavity stomach and

Choose an answer

Small intestine

Colon

Caecum

Rectum

A plant requires potassium for

Choose an answer

Synthesizing proteins

Synthesizing chlorophyll

opening and closing of stomata

None of these

Some enzymes also have a non-protein part known as a cofactor which is essential for the proper functioning of the

Choose an answer

Substrate

Enzymes

Reactant

Product

Plasmid is

Choose an answer

Essential for bacterial growth and metabolism

Drug resistant having disease and insect resistant gene

Essential for bacterial growth only

All of above

Koshland in 1959 proposed the modified form of

Choose an answer

Fluid mosaic model

Induce fit model

Unit membrane model

Reflective index model

The Casparian strips are present in

Choose an answer

Cortex cells of roots

Endodermal cells of roots

Cells of xylem

Cellf of phloem

In some mammals the hair have modified into spines e.g

Choose an answer

Penguin

Panther

Pangolin

Porcupine

The smallest bacteria are some members of the genus

Choose an answer

Microcystis

Mycoplasma

Closteridum

Pseudomonas

Which statement about the chemiosmotic mechanism is not true

Choose an answer

Protons return through the membrane by way of a channel protein

Proton are pumped across a membrane

Proton pumping is associated with the respiratory chain

Has no connection with the respiratory chain

Photosynthetic pigments are organized into clusters called

Choose an answer

Cytochromes

Photosystems

Phytochromes

Chromatophores

For gaseous exchange the cork tissue has special pores called

Choose an answer

Hydathodes

lenticels

Both a & b

Hone

Ferns belong to the group

Choose an answer

Sphenopsida

Lycopsida

Psilopsida

Filicinae

In conduction from S-A node to A-V node there is a delay of about

Choose an answer

0.7 seconds

0.4 seconds

0.15 seconds

0.2 seconds

Many human become ill from consuming milk and milk products because they lack

Choose an answer

Bacteria in their intestine

Rennin

Lactase

Hydrochloric acid

A hydrozoan polyp that may reach two metres in length is

Choose an answer

Branchio ceranthus

Physalia

Vellela

Obelia

Feeding by living in or on other organisms is a

Choose an answer

Parasite

Fungicide

Insecticide

Saprophyte

The structure in the mouth that prevents food from entering the nasal cavity is

Choose an answer

Epiglottis

Soft palate

Tongue

Pharynx

To draw a specific conclusion from some general principal or assumptions is called

Choose an answer

Hypothesis

Deductive reasoning

Inductive reasoning

Theory

Pili are primarily involved in a mating process between cells called

Choose an answer

Plasmogamy

Budding

Akinetes

Conjugation

The body cavity of nematoda

Choose an answer

Blastocoel

Haemocoel

Pseudocoelom

Coelom

Vertebrates that develop embryonic membranes around their embryo called

Choose an answer

Amniotes

Abamniotes

Embryotes

None of these

Chlorophyll contains

Choose an answer

Sulphur

Nitrogen

Magnesium

Calcium

An asucs is to ascomycetes as is a ....... to basidiomycetes

Choose an answer

Basidiospores

Basidiocarps

Basidium

Haustorium

To produce Lactose

Choose an answer

Two amino acids must form a peptide bond

Pairing of nitrogenous bases must occur between nucleotides

Glucose and galactose must undergo a dehydration reaction

Glucose and fructose must undergo a hydrolysis reaction

There are ...... known species of plants

Choose an answer

120000

227000

360000

412000

Cowpox pus is known as

Choose an answer

vacca

Vaga

Parapox

Puspox

Embryo-sac in angiosperms in also called

Choose an answer

Sporophyte

male gametophyte

Female gametophyte

None of these

Peptide bonds are found in

Choose an answer

Carbohydrate

Lipid

Proteins

Inorganic compounds

A mammalian herbivore has

Choose an answer

Fewer teeth than a carnivore

Flatter teeth than a carnivore

More teeth than a carnivore

More pointed teeth than a carnivore

In arthropods the body cavity is known as

Choose an answer

Pseudocelom

Enterocoel

Haemocoel

None of these

Phylogeny describes a species

Choose an answer

morphological similarities with other species

Evolutionary history

Reproductive compatibilities with other species

Geographical distribution

The two helices of DNA are held together by weak

Choose an answer

Nitrogen bonds

Oxygen bonds

Hydrogen bonds

Carbon bonds

If the organisms live parasitically at all times it is said to be an

Choose an answer

Obligate parasite

Facultative parasite

Ectoparasite

Endoparasite

Some stomach cells secrete

Choose an answer

Gastric juice

Hepatic juice

Pancreatic juice

BIle

Which statement about plastids is true

Choose an answer

They are surrounded by a single membrane

They are power house of cell

They are found in all organisms

They contain DNA and ribosomes

The scientific name of rice is

Choose an answer

Acacia fistula

Oryza sativa

Zea mays

Triticum vulgare

The closest relatives of fungi are probably

Choose an answer

Animals

Slime molds

Brown algae

Vascular plants

The power house of the cell is

Choose an answer

Ribosome

RER

SER

Mitochondria

A connecting & supporting tissue in animals is

Choose an answer

Connective

Muscle

Nerve

Bone

The taking in of complex food is known as

Choose an answer

Ingestion

Digestion

Assimilation

Excretion

Which of the following is a protein

Choose an answer

Cellulose

Cholesterol

ATP

Insulin

Canines are missing in

Choose an answer

Cats

Birds

Lions

Tigers

A plant requires nitrogen and sulfur for its

Choose an answer

Cell wall

Enzymes

Starch deposits

DNA replication

Globular proteins differ from fibrous proteins in

Choose an answer

Having more amino acids

Their repeating units joined by peptide bond

Being soluble in aqueous medium

Being non-crystalline

Virtually all biologists agree that animals avolved from

Choose an answer

Monera

Protoctists

Algae

Fungi

Amino acids are arranged in proper sequence during protein synthesis according to the instruction transcribed on

Choose an answer

Transfer RNA

Ribosomal RNA

Messenger RNA

DNA

Cell processes pyruvic acid by

Choose an answer

Alcoholic & lactic acid fermentation and aerobic respiration

Alcoholic & lactic acid fermentation and anaerobic respiration

Alcoholic & acetic acid fermentation and aerobic respiration

Alcoholic & oxalic acid fermentation and aerobic respiration

Fungi resemble animals because they are

Choose an answer

Saprotophs

Autotrophs

Heterotrophs

Heterosporous

Basophils produce heparin --- a substance that inhibits

Choose an answer

Blood transfusion

Blood clotting

Bleeding

Epilepsy

Modification of proteins and lipids as glycopeptides and glycoproteins occur in

Choose an answer

Ribosomes

Golgi apparatus

SER

All of above

Cell wall in Oomycetes is chemically composed of

Choose an answer

Cellulose

Chitin

Proteins

Lignin

Glycerol is the back bone molecule for

Choose an answer

Disaccharides

DNA

Triglycerides

ATP

Which of the following is not true of the guard cells

Choose an answer

They are present in the epidermis of leaf

They are connected by plasmodesmata with other epidermal cells

They contain chloroplasts

They are kidney shape

Our blood normally contains glucose

Choose an answer

0.6%

0.8%

0.06%

0.08%

Bacterial membrane also contain enzyme for

Choose an answer

Respiration

Photosynthesis

Protein synthesis

None of the above

Scientific name has advantages of

Choose an answer

Same name applied to different organism

Same organism have different name in different areas

Has not scientific basis

Has scientific basis and universally accepted

The number of stomata per square centimetre of leaf surface in tobacco plant is

Choose an answer

10000

11000

13000

12000

A condition of high blood pressure is called

Choose an answer

Hypotension

Hypertension

Tension

Isotension

The main tracheal trunk in cockroach communicates with exterior by

Choose an answer

100 pairs

10 pairs

8 pairs

4 pairs

Insulin has 51 amino acids, which are arranged in two polypeptide chains

Choose an answer

20 & 31 amino acids

11 & 40 amino acids

21 & 30 amino acids

25 & 26 amino acids

A heterosporous plant is one that

Choose an answer

Produces a gametophyte that bears both sex organs

Produces megaspores and microspores in separaue sporangia, giving rise to separate male and female gametophyte

Is a seedless vascular plant

Produces two types of spores, one asexually by mitosis, and one type by meiosis

Which statement is not true to Deuteromycota

Choose an answer

They are also called imperfect fungi

Their asexual spores are called conidia

It is a heterogenous polyphyletic group

They have both sexual and asexual reproduction

Co-enzyme Q is in turn oxidized by cytochrome

Choose an answer

a

a³

a²

b

The reversible inhibitors usually constitute

Choose an answer

Strong linkage with enzyme

Weak linkage with enzyme

No Linage with enzyme

medium linkage

The animals having structurally and functionally intermediate teeth between herbivores and carnivores are

Choose an answer

Insectivores

Detritivores

Saprozoic

Omnivores

Diffusion is 8000 times more quick in air than water for

Choose an answer

Argon

Oxygen

Nitrogen

Helium

A virion is

Choose an answer

Virus

Viral protein

Viral lysozyme

Viral gene

A large regional community primarily determined by climate is a

Choose an answer

Blome

Triome

Trichome

Bichome

Carbon dioxide enters the leaves through

Choose an answer

Stomata

Stroma

Gurad cells

Cuticle

Tay sach's disease in caused by the

Choose an answer

Accumulation of proteins

Accumulation of glycogen

Accumulation of lipids

Accumulation of vitamins

Parasitic fungi absorb nutrients directly from the living host cytoplasm with the help of special hyphal tips called

Choose an answer

Haustoria

Rhizoids

Roots

Gametangia

Which statement about fungus nutrition in not true?

Choose an answer

Some fungi are active predators

Some fungi are mutualists

Facultative parasitic fungi can grow only on their specific host

All fungi require mineral nutrients

Germ theory of disease was formulated by

Choose an answer

Antone Van Leeuwenhoek

Pasteur

Robert Koch

none of above

The food of porifera consists of microscopic organisms and organic particles in a percentage ratio of

Choose an answer

10% & 90% respectively

20% & 80% respectively

30% & 70% respectively

40% & 60% respectively

It belongs to family caesalpiniaceae

Choose an answer

Cassia fistula

Arachis hypogaea

Lupinus

Buttea

The closing and opening of stomata is directly controlled by

Choose an answer

Wind

Temperature

Water

Light

The most widely spread acyl glycerol is triacyl glycerol also called

Choose an answer

Triglycerides

Neutral lipids

Both a & B

None

Which statement about ATP is not true

Choose an answer

It is used as an energy currency by all cells

It is formed only under aerobic condition

Some ATP is used to drive the synthesis of storage compounds

It provides energy for many different biochemical reaction

One of the following has flagella rarely

Choose an answer

Diplobacilli

Spiral

Cocci

All of above

A major condition which leads to heart attack is

Choose an answer

Arteriosclerosis

Antherosclerosis

Hypertension

Obesity

Which one of the following kinds of atom does not occur in carbohydrates

Choose an answer

Carbon

Hydrogen

Nitrogen

Oxygen

Water is dense than air

Choose an answer

800 times

1800 times

8000 times

80,000 times

The cell wall consists of two over lapping shell in

Choose an answer

Euglenoids

Diatoms

Dinoflegellates

Brown algae

When blood leaves the capillary bed most of the carbon dioxide is in the form of

Choose an answer

Carbonate ions

Bicarbonate ions

Hydrogen ions

Hydroxyl ions

The fluid which surrounds the thylakoid is called

Choose an answer

Matrix

Stroma

Milieu

Medium

Which one is not accessory pigment

Choose an answer

Chlorophyll a

Chlorophyll b

Xanthphyll

Carotene

Cholorplasts are present mainly inside the leaf in

Choose an answer

Mesophyll tissue

Epidermal tissue

Dehydrolysis

Photolysis

90% of tptal transpiration is

Choose an answer

Cuticular

Stomatal

Lenticular

None

Cell membrane has 60-80%

Choose an answer

Lipids

Proteins

Carbohydrates

Vitamins

Iperfect fungi is also called

Choose an answer

Ascomycetes

Basidiomycetes

Zygomycetes

Deuteromycetes

In the peroxisomes the glycolate is converted into

Choose an answer

Serine

Ethanolamine

Glycine

CO₂

Nitrogen is present in

Choose an answer

Carbohydrates

Proteins

Fats s

Carbonates

Which statement about the nuclear envelop in not true

Choose an answer

It has pores

It is double membrane structure

Its inner membrane bears ribosomes

RNA and some proteins can pass through it

Oomycotes are close relatives of the

Choose an answer

Algae

Fungi

Protozoa

Bacteria

The wood of pyrus pastia is used for making

Choose an answer

Tabacco pipes

Walking sticks

Furniture

Baskets

The resolution of electron microscope ranges between

Choose an answer

2-6 um

2-4 A

3-6 A

3-9 mm

Blood contains ______ oxygen per 100 ml of blood when haemoglobin is 98% saturated

Choose an answer

19.6 ml

18.6 ml

16.6 ml

17.6 ml

Which one of the following statements about enzymes is not true

Choose an answer

They consist of proteins or without a non-proteins part

They change the rate of catalyzed reaction

They are sensitive to heat

They are non-specific in their action

Madrepora are commonly called corals the skeleton of which forms

Choose an answer

Large coral reefs

Small islands

Both a & b

Lagoons

Most vitamins function as

Choose an answer

Catalyst

High energy compounds

Gastrovascular cavity

Transport molecules

During the dark reaction of photosynthesis, the main process that occurs is

Choose an answer

Release of oxygen

Energy absorption by the chlorophyll

Adding of hydrogen to the carbon dioxide

Formation of ATP

The site where change of materials between blood and body tissues takes place are

Choose an answer

Arteries

Veins

Capillaries

Lymph vessels

Bacterial endospores function in

Choose an answer

Reproduction

Protein synthesis

Survival

Stronge

Walls of the chest cavity are composed of

Choose an answer

Ribs

Intercostal muscle

Ribs and intercostal muscle

Ribs, intercostal muscle and diaphragm

An activated enzyme made of polypeptide chain and a co-factor is

Choose an answer

Substrate

Co-enzyme

Apoenzyme

Holoenzyme

Which of the following processes cause substances to move across membranes without expenditure of cellular energy

Choose an answer

Endocytosis

Active transport

Diffusion

None of the these

The specificity of an enzyme is due to its

Choose an answer

Cofactor

Protein nature

Active site

Globular shape

The catalytic activity of an enzyme is restricted to its small protein called

Choose an answer

Active site

Passive site

Intermediate

Above all

The vertebrates in which placenta is formed during the development of foetus are known as

Choose an answer

Pisces

Aves

Mammals

None of these

Which one of following class of bacteria has the smallest size

Choose an answer

Bacillus subtilis

Mycoplasma

E-coli

Straptococci

Reindeer moss is

Choose an answer

Mycorrhiza

Lichen

Fungus

Alga

Asexual reproduction if fungi occurs through

Choose an answer

Spores

Conidia

Budding

All of above

Glucose will form a ring known as

Choose an answer

Ribofuranose

Glucpyranose

Furoribanose

Pyroglucanose

Mucus in saliva is made of

Choose an answer

Glycolipids

Glycoproteins

Phospholipids

Saturated fatty acids

In integrated disease management involves

Choose an answer

Combating of disease

Loss of microbes

Extinction of species

Division of zygote

When flagella surround the whole cell, the condition is called

Choose an answer

Peritrichous

Atrichous

Amphitrichous

None of above

One of the following is not double membranous structure

Choose an answer

mitochondria

Vacuole

Chloroplast

Nucleus

The entire cell wall of prokaryotes is often regarded as a single huge molecule of molecular complex called

Choose an answer

Murein

Cochlea

Lagena

Sacculus

Species is the basic unit of

Choose an answer

Genetics

Classification

Ecology

Zoology

Spores (teliospores) of ustliago tritici are carried by

Choose an answer

Water

Insects

Wind

Birds

The rate of reaction of enzyme directly depends upon

Choose an answer

Amount of enzyme present at a specific time at unlimited substrate concentration

Nature of substrate

Maximum pH level

Low temperature

Which statement about oxidative phosphorylation is not true

Choose an answer

Its functions can be served equally well by fermentation

In eukaryotes, its takes place in mitochondria

It is brought about by the chemiosmotic mechanism

It is the formation of ATP during the operation of the respiratory chain

The infectious proteins are

Choose an answer

Viruses

Virions

Prions

Peptons

Rate of flow of blood is 400 ___ 500 mm/s in

Choose an answer

Vena cava

Aorta

Capillaries

All

The zygomycetes

Choose an answer

Have hyphae without regularly occurring cross walls

Produce motile gametes

Are haploid throughout their life

Answer a and b are both correct

Temperate phage may exist as

Choose an answer

Prophage

Capsid

Virioid

Retrovirus

Horsetails belong to sub-division

Choose an answer

Lycopsida

Sphenopsida

Pteropsida

None of these

The sexual process exhibited by most ciliates is called

Choose an answer

Oogamy

Binary fission

Conjugation

Fertilization

Emphysema is a breakdown of

Choose an answer

Aiveoli

Teeth

Tissues

Haemoglobin

Hepatitis is usually caused by

Choose an answer

Viral infection

Toxic agents

Drugs

All a,b,c

The respiratory system is most efficient in ______

Choose an answer

Man

Bird

Fish

Snake

Animals obtain carbohydrates mainly from

Choose an answer

Glucose

Starch

Sucrose

Glycogen

Pasteurs main achievements are the development of vaccines for disease

Choose an answer

Anthrax

fowl cholera

Rables

All a,b,c

The acidic fruit of tamarindus indica are edible and are rich in

Choose an answer

Citric acid

Acetic acid

Tartaric acid

Vitamin C & A

In mollusca the foot is used for

Choose an answer

Capturing prey

Locomotion

Both a and b

None of these

The kingdom protista contain ...... major groups of eukaryotic organisms

Choose an answer

Three

Four

Five

Two

The membrane of vacuole is named as

Choose an answer

Apoplast

Symplast

Tonoplast

None

Cardiac muscles can be distinguished from other muscle fibers because cardiac muscles

Choose an answer

Contain only actin

Voluntary in action

Lacks regular arrangement of sarcomeres

Have intercalated disc

The enzymes involved in the viral replication are synthesized

Choose an answer

On viral ribosomes

In the interior surface of viral membrane

By the host cell

On the interior surface of viral coat

Greater pathogenicity to bacteria and protection against phagocytosis is provided by

Choose an answer

Capsule

Slime

Cell wall

Mesosomes

In 1966 Ernst Hacckel proposed a third kingdom called

Choose an answer

Monera

Plantae

Fungi

Protoctista

Plasmodium is the apicomlexan that causes

Choose an answer

Malaria

Yellow fever

Tuberculosis

Dysentery

The term of Biology is of

Choose an answer

Greek origin

Latin origin

English origin

German origin

Important terrestrial adaptations that evolved exclusiverly in seed plants include all of the following except

Choose an answer

Pollination by wind or animal instead of fertilization by swimming the sperm

Transport of water through vascular tissue

Independent of the gametophyte plant from the sporophyte

Dispersal of new plants by seeds

Which of the following statement about the ribosomes is correct

Choose an answer

They are structurally different from free ribosomes

They are enclosed in their own membrane

They are concentrated in the cisternal space for the rough ER

They are attached to cisternal surface

In anthoceros sporophyte at the junction of foot and spore-producing region there is a band of

Choose an answer

Paraphysis

Meristematic tissue

Phloem

Xylem

Which one of the following is employed in treatment of cancer

Choose an answer

Antibiotics and cancer

Radiotherapy and chemotherapy

Chemotherapy and antibiotics

All of the above

The animals on the border line between aquatic and true terrestrial animals are

Choose an answer

Amphibians

Reptiles

Bony fishes

Egg-laying mammals

Which of the following animals has no need for a gall bladder

Choose an answer

Cat

Man

Lion

Goat

The protein comprising about 20% of all rubisco in every plant leaf is

Choose an answer

Ribose

Ribulose

Deoxyribose

Ribofuranose

Enzyme that are integral part of ribosomes are involved in the synthsis of

Choose an answer

Lipids

Carbohydrates

Proteins

None of these

The calvin cycle is also known as

Choose an answer

C_{4 pathway}

C₃pathway

C₅pathway

C₆pathway

The number pf species of organisms, currently known to science, is

Choose an answer

1,000,000

1,500,000

2,000,000

2,500,000

Candida albicans a yeast causes oral and vaginal thrush i..e..

Choose an answer

Candidiasis

Condidosis

Both a and b

Candidum

The absorptive nutrition of fungi is aided by

Choose an answer

Spore formation

Their large surface area-volume ratio

They are parasites

They form fruiting bodies

The irritant substances of smoke generally cause

Choose an answer

Smoker's hiccough

Smoker's sneeze

Smoker's yawing

Smoker's cough

Golgi apparatus was discovered by Golgi in

Choose an answer

1897

1896

1898

1889

Which of the following is not included in grade Bilateria

Choose an answer

Coelenterates

Nematodes

Annelids

Molluscs

In amphibians the necessary requirements to spend their life history include

Choose an answer

Water

Land

Both water and land

None of these

Which type of cell would probably be most appropriate to study lysosomes

Choose an answer

Phagocytic white blood cell

Nerve cell

Mesophyll cell

Muscle cell

Detoxification of harmful drugs is the function of

Choose an answer

RER

SER

Both a and b

None of these

The male gametophyte of an angiosperm is the

Choose an answer

Anther

Embroyo sac

Microspore

Germinated pollen grain

The loss of liquid water through hydathodes in plants is called

Choose an answer

Imbibition

Transpiration

Bleeding

Guttation

Feeding by lving in or on other living organisms is

Choose an answer

Saprophytic nutrition

Parasitic nutrition

Symbiotic nutrition

Non of them

If we add more substrate to already occurring enzymatic reaction and it has no effect on the rate of reaction, then what will be be the situation of the following

Choose an answer

Saturation

Denaturation

Composition

Inhibition

Which of the following is not found in all bacteria is

Choose an answer

Cell membrane

A nucleoid

Flygella

None of these

All protists are eukaryotic and all evolved from

Choose an answer

Algae

Plants

Monera

Prokaryotes

In lichens, fungus protects the algal partner from

Choose an answer

Strong light

High temperature

Desiccation

Both a and c

Glucose and fructose are

Choose an answer

Non-reducing sugars

reducing sugars

Both a & b

None

Gram negaive cell wall has

Choose an answer

Only lipids

Only protein

More lipids and less protein

Less lipids and more protein

An enzyme is said to be denatured when

Choose an answer

It has no co-factor

It is in a condition of low temperature

Its structure is destroyed

None of these

The only photosynthesizing cells of epidermis of leaf are

Choose an answer

Cortex cells

Mesophyll

Guard cells

Xylem cells

Lack of chlorophyll results in

Choose an answer

Diagnosis

Chlorosis

Phosphorus

Symbiosis

Which one of the following is false about AIDS

Choose an answer

HIV

Auto-immune deficiency syndrome

T-lymohocytes

HAV

Most sac - fungi have asci inside macroscopic fruiting bodies called

Choose an answer

Basidiua

Ascosphores

Ascodiua

Ascocarps

The active site of an enzyme

Choose an answer

Never changes

Forms no chemical bond with substrate

Determines by its structure the specificity of an enzyme

Looks like a lump projection from the surface of an enzyme

The sum of all the chemical reaction that occur in the body is known as

Choose an answer

Anabolism

Metabolism

Catabolism

Differentiation

The main source of energy in cells are simple carbohydrates e.g

Choose an answer

Sucrose

Galactose

Fructose

Glucose

Mesosomes are internal extensions of the

Choose an answer

Cell wall

Cell membrane

Chromatin body

Capsule

Cell walls of Oomycotes contain

Choose an answer

Cellulose

Chitin

Peptidoglycan

Glycogen

Carbon combines with nitrogen in amino acid linkages to from

Choose an answer

Peptide bonds

Ester bonds

Glycosidic bonds

Ionic bonds

E-coli of fungi are the

Choose an answer

Rusts

Brown mold

Green mold

Yeasts

Diatoms are very important in

Choose an answer

Aquatic food chains

Electron transport chains

Terrestrial food chains

Respiratory chains

Carnivorous plants live in soils that are deficit in

Choose an answer

Water

Oxygen

Nitrogen

Iron

The water splitting step of photosynthesis that releases oxygen is called

Choose an answer

Hydrolysis

Lysis

Dehydrolysis

Photolysis

All living and nonliving matter are formed of simple units called

Choose an answer

Elements

Atoms

Molecules

Compounds

Which one of following is a viral disease

Choose an answer

Cow pox

Tetanus

Meningitis

Typhoid

The leaflets show dichotomous venation in

Choose an answer

Funaria

Ulva

Anthoceros

Adiantum

Nereis and chaetopterus are important examples of class

Choose an answer

Polychaeta

Oligochaeta

Hirudinea

Pelecypoda

It has become clear that fuctions of the cells are accomplished by the specailised structures called

Choose an answer

Tissues

Organs

Systems

Organelles

Which of the following is not related to cloning

Choose an answer

Replacement of the nucleus of zygote, by another nucleus of same organism

Separation of cells of embryo to form more embroys

The individuals resulting have similar genetic make up

Removal of piece of DNA or gene from the cell, and incorporating other gene or piece of DNA in it place

The body of animals which can be divided into two equal halves only in one plan is termed as

Choose an answer

Asymmetrical

Bilaterally symmetrical

Radically symmetrical

None of these

Xylem and phloem are not involved

Choose an answer

In transport of minerals

In transport of liquids

In transport of gases

In transport of water

The normally human blood absorbs the amount of oxygen at sea level is about

Choose an answer

200 ml/100 ml of blood

20 ml/100 ml of blood

19.6 ml/100 ml of blood

02 ml/100 ml of blood

In the lytic cycle of a bacteriophage, the host DNA is

Choose an answer

Replicated

Turned off by a protein coat

Digested into its nucleotides

Turned on by the removal of a protein coat

The polioviruses are the smallest known viruses and contain RNA in

Choose an answer

Oval capsid

Cubical capsid

Helical capsid

Spherical capsid

The AIDS is caused by virus

Choose an answer

VIH

MIV

AID

HIV

How much air can lungs when they are fully inflated

Choose an answer

5 liters

4 liters

3.5 liters

4.5 liters

In Hydra ectodermal cells get food from endodermal cells by

Choose an answer

Endocytosis

Exocytosis

Both a and b

Diffusion

At 25^oC the concentration of each of H⁺ and OH^- ions in pure water is about

Choose an answer

6^-7 mole/litre

8^-7 mole/litre

10^-7 mole/litre

12^-7 mole/litre

The arrangement of animals and plants into groups and subgroups on the basis of similarities

Choose an answer

Gradation

Classification

Organization

Grouping

In______ leaves the stomata are confined to only the lower epidermis

Choose an answer

Isobilateral

Dorsiventral

Both a and b

None of these

Which one of following is a fungus like protist

Choose an answer

Physarum

Rhizopus

Chlorella

Penicillium

AIDS is caused by

Choose an answer

H-virus

TMV

HIV

D- virus

Co-enzyme is a

Choose an answer

Covalently bonded non-protein part of an enzyme

Loosely bonded non-protein part of an enzyme

Co-factor consists of metal ions

None of these

Fungi resemble plants because they

Choose an answer

Have cell wall

Lack centriole

Are non-motile

All of the above

Hydrogen, carbon, oxygen, nitrogen, phosphorous and sulphur are the most common atoms found in

Choose an answer

Biological molecules

Periodic table

Soil

Water

All the living and non-living matter is formed of

Choose an answer

Atoms and sub-atomic particles

Organic molecules and tissues

Cells and cell products

Organs and organelle

In the binomial system of taxonomy, the first word of an organism's name is its

Choose an answer

Species

Genus

Race

Family

Magnesium is an important untrient ion in green plants as it is an essential component of

Choose an answer

Cell sap

Protein

Chlorophyll

Glucose

Bacterial membrane differs from eukaryotic membrane in

Choose an answer

Lacking protein

Lacking lipids

Lacking polysaccharides

Lacking sterol i.e. cholesterol

100 ml of arterial blood contains carbon dioxide about

Choose an answer

50 ml

40 ml

30 ml

20 ml

Rapid phase of growth of bacteria is

Choose an answer

Lag

Log

Stationary

Decline/Death

Ribosomes are particles of

Choose an answer

Riboglyco-protein

Riboglyco-lipid

Ribonucleo-protein

Ribonucleo-lipid

In males a cubic millimetre blood contains 5-5_{1/2 millions of}

Choose an answer

Lymphocytes

Erythrocytes

Platelets

Monocytes

A swim bladder is present in

Choose an answer

jawless fishes

Bony fishes

Cartilaginous fishes

Armoured fishes

The plasma membrane and every thing present within is known as

Choose an answer

Protoplast

Cytoplasm

Protoplasm

Nucleoplasm

The quantitative study of energy relationships and conservation in biological systems is

Choose an answer

Bioconservation

Bioenergetics

Biosynthesis

Biosystematics

External ear or pinna has a chain of three bones i.e incus malleus & stapes in

Choose an answer

Mammals

Birds

Reptiles

Amphibians

Deductive reasoning is always from

Choose an answer

Specific to general

Tentative to exact

General to specific

Qualitative to quantitative

Prosthetic group is

Choose an answer

Covalenty bonded non-protein part of an enzyme

Loosely bonded non-proteins part of an enzyme

Co-factor consists of metal ions

None of these

Which statement about nucleolus is not true

Choose an answer

Synthesize site for RNA

Composed of two regions

Without membranous boundary

Hereditary center

Carbon fixation refers to the initial incorporation of

Choose an answer

Carbon

Oxygen

CO₂

Hydrogen

Scientific name for onion (piyaz) is

Choose an answer

Allium cepa

Cassia fistula

Homo sapiens

Solanum tuberosum

Peptide bond is a

Choose an answer

C-N link

C-O link

N-H link

C-H link

A free swimming trochophore larva is produced during life cycle of

Choose an answer

Echinoderms

Annelids

Coelenterates

Arthropods

Syrinx is organ of voice in

Choose an answer

Amphibians

Birds

Reptiles

Mammals

In the two kingdom systems which of these would characterize an animal

Choose an answer

Photosynthesis

Ingestion of food

Cellulose cell wall

Inability to move

Oral cavity is helped in selection by the senses of smell taste and

Choose an answer

Hearing

Touch

Light

Sight

When a green plant performs photosynthesis at it maximum rate

Choose an answer

The rate of water loss in high

The water content of the plant will be low

The energy content of the plant will be low

The energy content will be unaffected

Aspergillus fumigatus causes aspergillosis but only in persons with defective immune system such as

Choose an answer

Diabetes

Hepatitis

Hiv

AIDS

As blood passes through the lungs each 100 ml of blood gives off carbon dioxide about

Choose an answer

2 ml

3 ml

4 ml

5 ml

In fungi, asexual reproduction takes place by

Choose an answer

Conidia

fragmentation

Budding

All of the above

Fungi grow best in habitats which have

Choose an answer

Moisture & carbon dioxide

Moisture & organic food

Moisture & oxygen

Moisture & light

Pseudocoelom is non-homologous to true coelom because

Choose an answer

It is not lined by coelomic epithelium

It has no relation with reproductive and excretory organs

It develops from blastocoel

All of the above

One _um is

Choose an answer

0.000.001 meter

1x10^-8 of a meter

0.000.0001meter

Both a & b

Each megasporangium has a single diploid megaspore

Choose an answer

Parent cell

Father cell

Mother cell

Daughter cell

Pteropsida is divided into ...... classes

Choose an answer

3

4

5

6

The citric acid cycle

Choose an answer

Takes place in the mitochondrion

Produces two molecules of NAD⁺for every glucose molecule processed

It is same as fermentation

Has no connection with the respiratory chain

Which class of molecule is the major component of cell membrane

Choose an answer

Phospolipid

Cellulose

Wax

Triglyceride

An isolated virus is not considered living, since it

Choose an answer

Separates into two inert parts

Cannot metobolize

Rapidly looses its gnome chemically inert

Is coated with an airtight shield

Mycorrhizal fungi are present in ______ families of flowering plant

Choose an answer

90%

80%

10%

100%

Glycolysis is the break down of

Choose an answer

Fructose

Glucose

Lactose

Maltose

The length of duodenum is about 20 to

Choose an answer

25 cm

30 cm

35 cm

40 cm

Before pyruvate enters the citric acid cycle, it is decarboxylated, oxidized and combined with coenzyme A forming acetyl CoA, carbon dioxide and one molecule of

Choose an answer

NADH

FADH₂

ATP

ADP

The rate of an enzyme catalyzed reaction

Choose an answer

Is constant under condition

Decreases as substrate concentration increases

Cannot be measured

Can be reduced by inhibitors

The cells which secrete their hormones are

Choose an answer

Blood cells

Nerve cells

Skin cells

Gland cells

The pressure flow theory is the most acceptable theory for the transport in the phloem of

Choose an answer

Gymnosperm

Bryophytes

Angiosperms

Pteridophyte

The major locomotory structures in bacteria are

Choose an answer

Flagella

Pili

Both a and b

None of these

Two iliac veins unite to form

Choose an answer

Inferior vena cava

Superior vena cava

Interior vena cava

Exterior vena cava

The process that most likely/directly enables a root cell to absorb minerals by active transport and enable a muscle cell to contract is

Choose an answer

Circulation

Excretion

Respiration

Assimilation

The heartwood of haematoxylon yields the dye

Choose an answer

Haematoxylin

Haemocyanin

Haemoglobin

Haemoerythrin

Most of the uptake of water and minerals from soil takes place through

Choose an answer

Roots

Root hair

Epidermal layers

Root cap

Which of the following pair of structure-function is mismatched

Choose an answer

Ribosomes, protein synthesis

Nucleolus, ribosomes production

Glogi, muscle contraction

Lysosome, intracellular digestion

Chemiosmosis is the process that uses membranes to couple redox reactions to

Choose an answer

Sugar production

Atp production

Sugar consumption

Atp consumption

Viruses can reproduce only in animal and plant cells or in microorganisms where they reproduce by replication thus they are

Choose an answer

Obligate intracellular parasites

Obligate extracellular parasites

Facultative intracellular parasites

Facultative extracellular parasites

The heart of the fist is single circuit and the blood flows in

Choose an answer

Two direction

One direction

One and two direction

Reverse direction

Digestion in Hydra and Planaria takes place within their

Choose an answer

Coelom

Alimentary cannal

Gastrovascular cavity

Mouth

Margulis and Schwartz have listed ...... phyla of protista

Choose an answer

Twenty three

Twenty five

Twenty seven

Twenty nine

Pasteur's main achievements are the development of vaccines for diseases

Choose an answer

Cholera, rabies only

Anthrax, rabies only

Anthrax, fowl cholera and rabies

None of the above

Which of the following is a primary bacterial cell wall function

Choose an answer

Transport

Support

Motility

Adhesion

Glycolysis

Choose an answer

Produces no ATP

It is same as fermentation

Takes place in the mitochondria

Reduces two molecules of NAD⁺For every glucose molecule processed

Lathyrus lupinus clitoria butea etc.. are some important ornamental plants of family

Choose an answer

Fabaceae

Poacese

Mimosaceae

Rosaceae

Duck-billed platypus and echidna (spiny anteaters) belong to sub-class

Choose an answer

Eutheria

Metatheria

Prototheria

Atheria

Sugar is obtained from the juice of

Choose an answer

Saccharum officinarum

Saccharum munja

Oryza sativa

Avena sativa

Enzymes are

Choose an answer

Polysaccharides

Proteins

Steroids

Triglyceride

The branch of Biology dealing with social behavior and communal life of human beings is

Choose an answer

Human Biology

Social Biology

Micro Biology

Bio technology

Chimpanzee had the chromosomes

Choose an answer

48

46

36

12

The plants having foreign D.N.A in their cells are

Choose an answer

Transgenic plants

Induced plants

Specific plants

Hydrophytic plants

Which of the following is present in both gram-positive and gram-negative cell walls

Choose an answer

An outer membrane

Peptidoglycan

Techoic acid

Lipopolysaccharides

The mechanism for ATP synthesis is

Choose an answer

Chemosynthesis

Photosynthesis

Chemiosmosis

Phosphorylation

Glycogen is an example of a

Choose an answer

Polysaccharide only

Carbohydrate only

Phospholipid

Both a polysaccharide and a carbohydrate

Conjugation is facilitated by

Choose an answer

Capsule

Pili

Flagella

Both pili and flagella

When a protein undergoes a hydrolysis reaction the end-products are

Choose an answer

Amino acid

Monosaccharides

Fatty acids

Nucleotides

At the tips of the branches in psilopsida are produced

Choose an answer

Archegonia

Antheridia

Sporangia

Zygote

Which of the following are called as sponges

Choose an answer

Protozoa

Porifera

Coelentrata

Nematoda

The capsomers present in the capsid of adenovirus are

Choose an answer

100

200

252

352

Tay sachs disease results due to accumulation in brain cells

Choose an answer

Mg++ions

Glucose

Lipids

Protein

The main processes involved for getting the material into and out of cells are

Choose an answer

Diffusion and osmosis

Active and passive transport

Endocytosis and exocytosis

All above

One of the following is in the order of increasing group size, beginning with the smallest family, kingdom, species, phylum or division, genus, order and class

Choose an answer

Family, kingdom, species, genus

Division, genus, order, class

Class, genus, order, family

Species, genus, order, family

Nuclear membrane is absent therefore prokaryotic cell has no distinct

Choose an answer

Mitochondria

Ribosomes

Nucleus

Lysosomes

Emphesema is breakdown of

Choose an answer

Muscles

Capillaries

Alveoli

None of these

In cross section each centriole consists of a cylindrical array of microtubules

Choose an answer

3

5

7

9

If more substrate to an already occurring enzymatic reaction is added more enzyme activity is seen because

Choose an answer

There is probably more substrate present than there is enzyme

There is probably more enzyme available than there is substrate

There is probably more product present than either substrate or enzyme

The enzyme substrate complex is probably failing to from during the reaction

In lysogenic cycle, the DNA of bacteriophage

Choose an answer

Joins the bacterial chromosomes

Attaches to the inner surface of the host membrane

Is immediately degraded when it enters the host

Goes directly to the host's ribosomes for translation

To biological function of a protein is determined by its

Choose an answer

Primary structure

Secondary structure

Tertiary structure

Quaternary structure

Respiratory pigment present in muscles is called ______

Choose an answer

Myoglobin

Globin

Haemoglobin

Haemocyanin

Heart burn is a painful sensation in the

Choose an answer

Stomach

Small intestine

Chest cavity

Pharynx

The cell wall consits of two shells that overlap like a petridish

Choose an answer

Foraminifera

Actinopods

Slime molds

Diatoms

bryophytes are generally thought to have evolved from

Choose an answer

Brown algae

Red algae

Golden algae

Green algae

The common name of Allium cepa is

Choose an answer

Piyaz

Bathu

Amaltas

Chana

Utilization of products of digestion for production of energy or synthesis of cellular material is called

Choose an answer

Assimilation

Absorption

Digestion

Egestion

Animals that have their body cavity filled with parenchyma are called

Choose an answer

Acoelomates

Coelomates

Pseudocelomates

None of these

Who proposed the kingdom protista for microscopic organisms

Choose an answer

Whittaker

Hogg

Copeland

Haeckel

Competitive inhibitors

Choose an answer

Destroy the structure of enzyme

Resemble structurally with substrate

Do occupy active site

Both b and c are correct

In blood clotting process prothrombin acts as a

Choose an answer

Channel

Catalyst

Vehicle

Means

Most ciliates are capable of a sexual process called

Choose an answer

Oogamy

Mating

Conjugation

Copulation

The enzymes of glyoxylate cycle are located in the

Choose an answer

Peroxisomes

Glyoxisomes

Ribosomes

Lysosomes

Algae have shells composed of halves that five fit together like Petri dish belong to

Choose an answer

Brown algae

Diatoms

Euglenoids

Green algae

The cell wall of each diatom consists of

Choose an answer

Single shell

two shells

Triple shells

Quadruple shells

The class hepaticeae includes about ...... species

Choose an answer

600

900

1100

1200

Lysosomal sacs are rich in

Choose an answer

Acid oxidase and hydrolytic enzyme

Acid phosphatase and hydrolytic enzyme

Aductase and oxidases only

None of above

Pigs are the reservoir to

Choose an answer

Hepatitis A

Hepatitis B

Hepatitis C

Hepatitis E

If the non-protein part is covalently bonded to enzyme it is known as a

Choose an answer

Coenzyme

Co-factor

Holoenzyme

Prosthetic group

In lactic acid fermentation each pyruvic acid molecule is converted into lactic acid C₃H₆O_{3 in the}

Choose an answer

Absence of oxygen

Presence of oxygen

Absence of CO₂

Presence of CO₂

The feeding stage of a slime mold is called

Choose an answer

Mycelium

Pseudopodium

Hyphae

plasmodium

Algae in which body is differentiated into blades, stipes, and holdfast belong to

Choose an answer

Golden algae

Diatoms

Kelps

Euglenoids

African sleeping sickness is caused by

Choose an answer

Entamoeba

Trypanosoma

Pelomyxa

Stentor

Which of the following is a feature of series deuterostomia

Choose an answer

Cleavage of zygote is spiral and determinate

Coelom is formed due to splitting of mesoderm

Mouth arises from blastopore or anterior margin

Mesoderm is derived from wall of developing gut

Trypanosoma causes the disease known as

Choose an answer

Malaria

Sleeping sickness

Diarrhea

None of these

Centrioles play important role in the location of furrowing during cell division and in the formation of

Choose an answer

Cirri

Pseudopodia

Cilia

Flagella

Which of the following cells/structures are associated with asexual reproduction in fungi

Choose an answer

Ascospores

Conidia

Zygospores

Basidiospores

When deprived of oxygen, yeast cells obtain energy by fermentation, producing carbon dioxide, ATP, and

Choose an answer

Acetyl CoA

Ethyl alcohol

Lactate

Pyruvate

The skeleton of Athropds is made of

Choose an answer

Silica

Chitin

Calcium carbonate

Both a and c

Chitin in the walls of fungi is more resistant to

Choose an answer

Decay

pH

Temperature

Moisture

Which one of the following is a correct sequence in biological methods

Choose an answer

Observation-hypothesis-law-theory

Observation-hypothesis-deduction-testing of deduction

Hypothesis-observation-deduction-testing of deduction

law-theory-observation-deduction

Example of anthoceropsida is

Choose an answer

Porella

Marchantia

Anthoceros

Adiantum

Air spaces between mesophyll cells of a leaf comprise ______ of the total volume

Choose an answer

20%

30%

40%

50%

In addition to chromosomes many bacteria contain

Choose an answer

Mitochondria

Chloroplasts

Plasmids

Glyoxisomes

Family Roasceae has ...... genera in Pakistan

Choose an answer

27

29

30

31

Erythrocytes have

Choose an answer

Only 4 or 5 pores per nucleus

Only 2 or 4 pores per nucleus

Only 3 or 4 pores per nucleus

Only 5 or 6 pores per nucleus

Heart pumps the blood to different parts of the body via

Choose an answer

Superior vena cava

Inferior vena cava

Aorta and arteries

Both a,b,c

The study of microorganisms is called

Choose an answer

Parasitology

Microbiology

Social Biology

Molecular Biology

The protein which is carboxylase as well as oxygenase

Choose an answer

Ribulase

Ribulose

Carbamide

Rubisco

Lamprey and hagfishes are examplesof class

Choose an answer

Chondr-ichthyes

Osteichthyes

Cyclostomata

Myxini

The catalytic activity of enzymes is restricted to a small portion of the enzyme known as

Choose an answer

Binding site

Active site

Catalytic site

Non-binding site

Terpendios are made up of a simple repeating unit

Choose an answer

Prenoid unit

Isoprenoid unit

Terpene unit

Steroid unit

Chlorophyll a, Chl b, and carotenoids are founds in

Choose an answer

Brown algae, golden algae, and diatoms

Green algae, golden algae and diatoms

Green algae, euglenoids and plants

Red algae, euglenids and brown algae

Five kingdom system of classification proposed by Margulis and Schwartz is not based on

Choose an answer

Genetics

Cellular organization

Nucleic acid

Mode of nutrition

Bacteria decompose

Choose an answer

Organic matter

Inorganic matter

Both a & b

None

A complex cartilaginous structure surrounding the upper end of the trachea is

Choose an answer

Epiglottis

Bronchiole

Larynx

Alveoli

Which one of the following is and organic molecule

Choose an answer

C₆H₁₂O₆

NO₂

H₂O

H₂SO₄

Which of the following is not true for spores produced by fungi

Choose an answer

They are haploid

They need water for their dispersal

They are non-motile

They are produced in large number

Release of nitrates by saprophytic bacteria helps in

Choose an answer

Carbon cycle

Oxygen cycle

Nitrogen cycle

Water cycle

In annelids the organs for excretion are

Choose an answer

Flame cells

Nephridia

Protonephridia

Kidneys

A structure within a cell that perform specific function is called

Choose an answer

Molecule

Atom

Organelle

Element

Gametophyte in bryophytes is

Choose an answer

Haploid

Diploid

Triploid

Pentaploid

Growth and development of plant is the function of

Choose an answer

Meristematic cells

Parenchymatous cell

Sclerenchymatous cells

Chlorechymatous cells

According to lock and key model the active site

Choose an answer

Rigid structure

Soft structure

Terrible structure

Attractive structure

Fungal cell walls contain chitin, which is also found in exoskeleton of

Choose an answer

Arthropods

Molluses

Echinoderms

Chordates

Specialized organ for respiration are found in

Choose an answer

Amoeba

Earthworm

Sponge

Cockroach

Which one of the following is true about chloroplast

Choose an answer

Found in underground parts of plants

Help in pollination and dispersal of seeds

Self replicating organelles

Involve in protein synthesis

Cloning is a technology for achieving

Choose an answer

Biology aims

Scientific aims

Integrated aims

Eugenic aims

There are a series of C shaped cartilage rings in the wall of

Choose an answer

Oesophagus

Aorta

Trachea

Superior vena cava

Lymph most closely resemble with

Choose an answer

Blood

Plasma

Interstitial fluid

Urine

Myocardium of the heart is made up of special type of muscles

Choose an answer

Smooth muscles

Skeletal muscles

Cardiac muscles

Both a & c

The raw material for co-enzymes are

Choose an answer

Lipids `

Proteins

Vitamins

None of these

All bryophytes share certain characteristics which are

Choose an answer

Reproductive cells in protective chambers

A waxy cuticle, true leaves and reproductive cells in protective chambers

Vascular tissues, true leaves and a waxy cuticle

Vascular tissue and a waxy cuticle

Which of the following is a motile coclenterate

Choose an answer

Hydra

Obelia

Jelly fish

Corals

In the first step of citric acid cycle, acetyl CoA reacts with oxaloacetate to form

Choose an answer

Pyruvate

Citrate

NADH

ATP

A triglyceride is a

Choose an answer

Simple sugar

Lipid

Protein

Nucleic acid

In deuterostomia (Deuterostomes) mesoderm is derived from wall of developing

Choose an answer

Gut

Archenteron

Both a & b

Stomach

Glucose and fructose are

Choose an answer

Non-reducing sugars

reducing sugars

Both a & b

None

Amoebas move and obtain food by means of

Choose an answer

Plasmodium

Flagella

Cilia

Pseduopodia

The botanical name of egg plants is

Choose an answer

Capsicum annum

Solanum molangena

Atropa bellodone

Datura

Hereditary characteristics pass from parents to offspring through genes in their

Choose an answer

Nuclei

DNA

Gametes

Body

Mendel called the offspring of first parents as

Choose an answer

F₁

First filial generation

Both a & b

First generation

Origin site of replication is one in

Choose an answer

Prokaryotes

Eukaryotes

None of these

Both a & b

Mammalian kidney including human is adapted to conserve water by over

Choose an answer

20.5%

50%

99.5%

70%

In man the vestigial organs are

Choose an answer

Ear muscles

Nictitating membrane

Coccyx

All a,b and c

A general formula called the hard-Weinberg equation is used for calculating the frequencies of alleles and genotypes in populations at

Choose an answer

Equilibrium

Balance

Stability

Poise

In seminiferous tubules repeated division of the germinal epithelium produce

Choose an answer

Oogonia

Zoogonia

Ovogonia

Spermatogonia

Endangered species of plants have been recorded to more than

Choose an answer

200

300

400

500

Each type of the principal type of sensation that we can experience e.g pain touch sight sound and so for this called a modality of

Choose an answer

Regulation

Susceptibility

Coordination

Sensation

As distal end humerus forms hinge joint with

Choose an answer

Radius

Ulna

Tibia

Both a & b

About 500 ml water is needed to excrete 1g of ammonia

Choose an answer

Hydrogen

Oxygen

Nitrogen

Helium

The number of chromosomes in frog is

Choose an answer

52

26

13

7

As CFC_s rise to the atmosphere ultraviolet rays release

Choose an answer

Fluorine

Chlorine

Carbon

Hydrogen

Mitosis may be divided into two phases

Choose an answer

Karyikinesis & cytokinesis

Karyikinesis & diakinesis

Diakinesis & cytokinesis

Exokinesis & endokinesis

A natural process in which surface soil is removed by the action of water or wind is

Choose an answer

Corrosion

Attrition

Erosion

Weathering

A woman can be bald only when she is

Choose an answer

Homozygous domunant

Heterozygous

Homozygous recessive

Maleness

In tropical and subtropical grassland rain reaches about

Choose an answer

1500 mm

2000 mm

2500 mm

3000 mm

The kinetochore fibres of spindle attach to the kinetochore region of chromosome and align them at the equator of the spindle forming

Choose an answer

Equatorial plate

Metaphase plate

Central plate

Both a & b

The means by which recombinant DNA is introduced into a host call is called

Choose an answer

Plasmid

Carrier

Vector

Lifter

In 1970 Hamilton D.Smith at Johns Hopkins University isolated the first

Choose an answer

DNA polymerase

DNA ligase

Diastase

Restriction enzyme

The tumours which are of small size and localized are

Choose an answer

Bengin

Malignant

Gentle

Nasty

Clear cytoplasm produces

Choose an answer

Larval epidermis

Muscle cells

Gut

Neural tube

Water is stored for use during the period of drought in fleshy stems of

Choose an answer

Cacti

Euphoribia

Both a & b

None of these

Commonly used restriction enzyme is

Choose an answer

Ecor4

Eco R3

EcoR2

EcoR1

Archaebacteria tolerate temperatures up to

Choose an answer

10^oC

40^oC

67^oC

120^oC

Luteinizing hormone induces

Choose an answer

Flowering

Ovulation

Vernalisation

Menopause

A dichromate can perceive two primary colours but is unable to perceive the one whose opsins are missing due to

Choose an answer

Metamorphosis

Transmutation

Alteration

Mutation

Asexual reproduction requires only a single parental organism which gives rise to offspring by

Choose an answer

Mitotic cell division

Meiotic cell division

Both a and b

None of these

DNA threads are chemically cut into pieces of different sizes in

Choose an answer

Maxam-Gilbert method

Sanger's method

Smith's method

Sanford's method

Gene pool consists of all alleles at all gene loci in all individuals of the

Choose an answer

Family

Clan

Population

Community

Buoyancy in the water is maintained by a specialized structure in bony fish called

Choose an answer

Fins

Swim bladder

Tail

Both a & c

Who was the first to propose an objective definition of instincts in terms of animal behaviour

Choose an answer

Darwin

Lamarck

Wallace

Lyell

A willow 10 centimetres (4 inches) high may have a trunk 7 centimetres (3 inches) in diameter and be 50 years old in

Choose an answer

Taiga

Tundra

Desert

Savanna

In human only one ovum is usually discharged from the ovary at one time this phenomenon is called

Choose an answer

Ovulation

Menstruation

Oestrous

Apomixes

Oxone molecule is made up by binding of three atoms of

Choose an answer

Nitrogen

Oxygen

Hydrogen

Carbon

Each muscle fibre contains a large number of myofibrils having a diameter of

Choose an answer

1 - 2 mm

1 - 5 mm

2 - 4 mm

3 - 7 mm

The total aggregate of genes in a population at any one time is called the populations gene

Choose an answer

Puddle

Lake

Pool

Pond

At the time of independence in 1947 the population of pakistan was

Choose an answer

10 m

20 m

25.7 m

32.5 m

According to one of the speculations life may have begun deep in the oceans in underwater hot springs called hydrothermal

Choose an answer

Apertures

Gaps

Vents

Outlets

DNA changes are called mutations and the organisms that have undergone such changes are called

Choose an answer

Wild types

Changer

Mutants

Transmutants

An ordered sequence of irrversible steps with each step setting up the necessary conditions for the next step is

Choose an answer

Embryology

Growth

Development

None of these

If all members of a population are homozygous for the same allele that allele is said to be

Choose an answer

Multiple allele

Jumping gene

Fixed in the gene

Perfect gene

The negative physiological changes in our body are said to be

Choose an answer

Maturation

Childhood

Agning

Displacement

An ezyme that can be used to treat a human Iysosome storage disease is

Choose an answer

B-galactosidase

a-galactosidase

Glucosidase

Invertase

ABO system has four different phenotypes which are distinct from each other on the basis of specific antigens on the surface of

Choose an answer

Mitochondria

Gogli bodies

RBC

Centrioles

O blood has neither A or B antigen but it does have

Choose an answer

Anti - A antibodies

Anti - B antibodies

Anti - O antibodies

Both a & b

The end products of haemoglobin breakdown and metabolites of various hormones is

Choose an answer

Glucagon

Bilirubin

Keratin

Serotonin

The animals which are capable of varying degrees of endothermic heat production but generally do not regulate their body temperature within a narrow range

Choose an answer

Ectotherms

Endotherms

Heterotherms

Homotherms

For maximum growth the optimum temperature is 25 - 30^oC and it least at

Choose an answer

1 - 3^oC

5 - 10^oC

4 - 8^oC

6 - 12^oC

Active membrane potential is

Choose an answer

0.05 volts

- 50 mv

Both a & b

0.07 volts

On over the wound the cambium forms

Choose an answer

Callus

Wood tissues

Both a & b

Gall

In addition to auxin which hormone also play important role in apical domince

Choose an answer

Abcesic acid

Gibberellins

2,4-D

Cytokinins

Adult transgenic tobacco plants glowed when sprayed with the substrate

Choose an answer

Luciferon

Luciferin

Luciferol

Luciferase

Germ cells in the ovary produce many

Choose an answer

Spermatogonia

Zoospores

Zygospores

Oogonia

Human skin colour is also a quantitative trait which is controlled by

Choose an answer

3 - 6 gene pairs

1 - 3 gene pairs

None of these

The average rainfall is between 750 - 1500 mm in

Choose an answer

Temperate deciduous forests

Coniferous alpine and boreal forests

Tropical rain forests

Grassland ecosystem

80% haemophiliacs suffer from haemophilia A due to abnormality of factor

Choose an answer

VIII

IX

X

XI

The interaction between different genes occupying different loci is

Choose an answer

Pleiotropy

Epistasis

Bombay phenotype

Linkage

Fibroblasts and osteoblasts migrate into the fracture site and begin to construct

Choose an answer

Bone

Cartilage

Muscle

Joint

At the distal end the femur forms knee joint with the proximal end of two parallel bones called

Choose an answer

Tibia and fibula

Radius & ulna

Carpals & metacarpals

Tarsal & metatarsal

In 1999,transgenic crops were planted world wide on more than

Choose an answer

20 millions areas

35 millions areas

70 millions areas

90 millions areas

During elongation the cell volume increase up to 150 fold due to uptake of

Choose an answer

Light

Oxygen

Water

Carbon dioxide

Each nuclear power station only can last for about

Choose an answer

10 years

20 years

30 years

40 years

DNA finger prints can also be used as

Choose an answer

Crime evidence

Forensic evidence

Litigation evidence

Offence evidence

The pairing of homologous chromosomes is completed in

Choose an answer

Leptotene

Zygotene

Pachytene

Diplotene

Osteoblast and osteoclasts continue to migrate inward multiply rapidly and gradually convert the soft calius into

Choose an answer

Hard callus

Stony callus

Bony callus

Jolly callus

The perennial plants are bushes or cacti with large shallow root systems in

Choose an answer

Grassland

Deserts

Tundra

Taiga

ABO blood group system was discovered by

Choose an answer

Karn Ladsteiner

Bernstein

Correns

T.H.morgans

Biorhythms are called circadian which means about one day so they are also called

Choose an answer

Diurnal pace

Diurnal cadence

Diurnal rhythms

Diurnal tempo

Imprinting is best known in birds such as

Choose an answer

Geese

Ducks

Chickens

All a,b,and c

A probe is a single stranded nucleotide sequence that will hybridize (pair) into a certain piece of

Choose an answer

DNA

RNA

Amino acid

Fatty acid

A network of very fine threads called chromatin can be visualized in call during

Choose an answer

Interphase

Prophase

Metaphase

Anaphase

Menstruation usually lasts for

Choose an answer

3 - 7 days

2 - 5 days

1 - 3 days

5 - 7 days

The number of nucleotides in the DNA of a typical human chromosome is about

Choose an answer

10 Million

40 million

80 million

140 million

For evaporative cooling bats use

Choose an answer

Saliva

Urine

Sweat

All a,b,andc

Cytokinins delay the aging of fresh leaf crops such as cabbage and lettuce as well as keeping flowers

Choose an answer

Attached

Fresh

Delayed

Open

Jean Baptiste Lamarck published his theory of evolution in

Choose an answer

1757

1809

1859

1945

A hurdened outer surface to which internal muscles can be attached is

Choose an answer

Endoskeleton

Hydrostatic skeleton

Exoskeleton

Axial skeleton

In nature P 730 to P 660 conversion occurs in the

Choose an answer

Day

Dark

Evening

Dawn

Commonly enzyme thermus aquatious is also known as

Choose an answer

Taq polymerase

DNA polymerase

RNA polymerase

Taq ligase

Every 200 nucleotides the DNA duplex is coiled around a core of eight histone proteins forming a complex known as a

Choose an answer

Histomone

Nucleosome

Peroxisome

Glyoxisome

The earth surface covered with water is

Choose an answer

35%

11%

21%

33%

Abdomen has a peritoneal cavity lined by a thin epithelium called

Choose an answer

Pericardium

Peritoneum

Scrotal sac

Pleura

In 1944 Oswald Avery along with Colin Macleod and Maclyn McCarty repeated experiments of

Choose an answer

Lamarck

Griffith

Darwin

Spemann

First essential phenomenon of meiosis i.e pairing of homologous Chromosomes called synapsis starts in

Choose an answer

Leptotene

Zygotene

Pachytene

Diplotene

Rain that falls on high areas such as mountains possesses large amount of garvitational

Choose an answer

Heat energy

Kinetic energy

Electrical energy

Potential energy

From beginning of the 3^rd month of pregnancy the human embryo is referred to as the

Choose an answer

Foetus

Kid

Kitten

CUb

Dialysis cleans the blood either by

Choose an answer

Passing it through an artificial kidney

Filtering it within abdomen

Removing the whole blood from body

Both a&b

G₁ is time between the end of mitosis and initiation of DNA synthesis also called as

Choose an answer

Pre-DNA synthesis phase

DNA synthesis phase

Post-DNA synthesis phase

None of these

Only 30% of the earth is dry land the remainder being covered with

Choose an answer

Water

Air

Trees

Grass

Arthritis covers over 100 different types of inflammatory or degenerative diseases that damage the

Choose an answer

Legs

Arms

Sutures

Joints

Each bivalent has

Choose an answer

Twochromatids

Four chromatids

Both a & b

None of these

Grasslands present in temperate climates are also called

Choose an answer

Prairies

Pampas

plain

Lowland

External genitalia of human male consist of a pair of testes which lie outside the body in the sac like

Choose an answer

Pouch

Marsupium

Scrotum

Bag

If the two generations are vegetatively similar such alternation of generation is referred to as

Choose an answer

Homomorphic

Isomorphic

Heteromorphic

Eumorphic

Modern man is called

Choose an answer

Homo erectus

Homo habilis

Homo sapiens

Homo neanderthalensis

Eukaryotes are thought to have first appeared about____billion years ago

Choose an answer

1.2

1.3

1.4

1.5

The parts of the body used extensively to cope with the environment become larger and stronger while those that are not used deteriorate was argued by

Choose an answer

Charles Drawin

Alfred Wallace

Carolus Linnaeus

J.B Lamarck

Cocklebur (Xanthium),chrysanthemum,soyabean,tobacco,strawberry are examples of

Choose an answer

Short day plants

Long day plants

Day-neutral plants

None of these

Okazaki fragments are about 1000 - 2000 nucleotides long in

Choose an answer

Prokaryotes

Eukaryotes

Both a & b

None of these

The union of meiotically produced specialized sex cells from each parents produce

Choose an answer

Fertilized egg

Unfertilized egg

Zygote

Both a & c

Macaca mulatta is commonly known as

Choose an answer

Rhesus monkey

Chimpanzee

Apes

Gorilla

The main transmitter for synapses that lie outside the central nervous system is

Choose an answer

Adrenaline

Acetylcholine

Serotonin

Dopamine

Cystic fibrosis patients lack a gene that codes for trans-membrane carrier of the

Choose an answer

Chloride ion

Sodium ion

Potassium ion

Calcium ion

Crossing over and random assortment of chromosomes are two significant happenings of

Choose an answer

Mitosis

Amitosis

Meiosis

All a,b,and c

On the basis of structure and shape of the cap,two species of Acetabularia have been identified

Choose an answer

Acetabularia mediterrance & A.crenulata

A.typhi & A.mediterranea

A.crenulate & A.sisso

A.crenulata & A.arabica

Fresh water flatworms excrete very dilute

Choose an answer

Plasma

Tissue fluid

Fluid

Urine

Three sets of microtubules (fibres) originate from each pair of

Choose an answer

Glyoxisomes

Iysosomes

Peroxisomes

Centrioless

Water used for industrial purposes is about

Choose an answer

9%

90%

70%

50%

Bats and humming bird are called

Choose an answer

Heterotherms

Ectotherms

Endotherms

poikilotherms

The most threatened areas on the earth have been reduced to 44% of their original extent are

Choose an answer

Tropical rain forests

Temperate rain forests

Carbiniferous forests

Deciduous rain forests

Bowman capsule continues as extensively convoluted proximal tubule loop of henie and the distal tubule which empties into

Choose an answer

Collecting tubules

Malpighian tubules

Renal tubules

Neural tubules

PCR takes its name from

Choose an answer

RNA polymerase

DNA polymerase

DNA ligase

Endonuclease

Genetic code is a combination of 3 nucleotides in DNA which specify a particular

Choose an answer

Amino acid

Fatty acid

Vitamin

Steriod

Some amoeboflagellates ingested cyanobacteria and led to the development of

Choose an answer

Mitochondria

Golgi apparatus

Chloroplasts

Vacuoles

Excess MSH is secreted in

Choose an answer

Addison's disease

Parkinson's disease

Grave's disease

Alzheimer's disease

The primary structure for eliminating waste products in man are

Choose an answer

Liver

Kidneys

Stomach

Both a & b

Fresh water ecosystem covers less than

Choose an answer

7%

5%

3%

1%

³²P and ³⁵S labeled viruses were used in his experiments by

Choose an answer

Watson & Crick

Hershey & Chase

Wilkins & Franklin

Correns & Bridge

It is estimated that human genome could take an encyclopaedia of 200 volumes each with

Choose an answer

10 pages

100 pages

1000 pages

10,000 pages

Effect of photoperiodism was first studied in 1920 by

Choose an answer

Darwin & Francis

Garner & Allard

Linnaeus & Lamarck

Walson & Crick

The individuals have additional sex chromosome in

Choose an answer

Klinefelter's syndrome

Turner's syndrome

Down's syndrome

Sach's syndrome

Dialyses means

Choose an answer

Removing the blood

Cleaning the blood

Diluting the blood

Storing the blood

Interphase can further be divided into

Choose an answer

G₁-phase,S-phase and G₂-phase

G₁-phase,G₂-phase and G₃-phase

S₁-phase,S₂-phase and S₃-phase

S₁-phase,G-phase and S₂-phase

A full set of genes of an individual is called

Choose an answer

Genotype

Genomic library

Genome

Allelomorph

Frogs and toads also walk and hop on land due to strong

Choose an answer

Forelimbs

Hindlimbs

Trunk

Head

The series of changes which involve period of growths replication of DNA followed ny cell division may be named as

Choose an answer

DNA cycle

Nuclear cycle

Cell cycle

Chemical cycle

Bipedal locomotion freed the front appendages which become adapted for

Choose an answer

Prey capture

Flight

Both a & b

None of these

Fluid secreted by sertoli cells provides sperms

Choose an answer

Liquid medium

Protection

Nourishment

All a,b,and c

In chordates the healing of fracture and repair of a skin wound are some other examples of

Choose an answer

Reformation

Regeneration

Rejuvenation

Renaissance

Earthworm is the ideal example of tubular excretory system called

Choose an answer

Protonephridia

Mesonephridia

Metanephridia

Prenephridia

A clear picture of the genetic basis of sex determination emerged after the discovery of

Choose an answer

Autosomes

X chromosomes

Sex chromosomes

Y chromosomes

Genes are located at specific loci on

Choose an answer

Chromatids

Chromosomes

Centromeres

Homologues

The gene for blue opsin is present on autosome

Choose an answer

1

3

5

7

The decline in thickness of the ozone layer is caused by increasing level of

Choose an answer

Chlorofluorocarbon

Nitrogen

Chlorine

Carbon dioxide

In incubating eggs artificially the incubators are usually regulated at temperature between

Choose an answer

20 - 22^oC

27 - 29^oC

30 - 32^oC

36 - 38^oC

If lobster loses its pincer claw a new claw

Choose an answer

Regenerates

Never develops

IS ready

None of these

In oceans especially in tropical regions temperature of surface water is about

Choose an answer

10^oC

15^oC

25^oC

35^oC

Tundra ecosystem is located on Mountains

Choose an answer

Kara-koram

Hindukush

Salman

Both a & b

Each tRNA has a sequence of three bases called anticodon which is complementary to codon of

Choose an answer

rRNA

tRNA

mRNA

snRNA

In the chick the mesodermal cells migrate and caudally from both sides and create a mid line thickening called

Choose an answer

Primitive streak

Excretion

Ultra-streak

Blastoderm

Which prosess is characterized by movement and rearrangement of cells in the embryo

Choose an answer

Blastulation

None of these

Neurulation

Gastrulation

Between the seminiferous tubules are interstitial cells which secrete

Choose an answer

Cestrogen

Testosterone

Progesterone

Oxytocin

In grassland ecosystem annual rainfall is about 250 to

Choose an answer

350 mm

450 mm

650 mm

750 mm

Abscisic acid can be sprayed on tee crops to regulate

Choose an answer

Leaf drop

Shoot drop

Cone drop

Fruit drop

From Hensen's node,dorsal mesoderm is formed and is organized into

Choose an answer

Segments

Fragments

Somitcs

Remains

Mammals including human maintain their high body temperature within a narrow range of about

Choose an answer

30-32^oC

36-38^oC

32-36^oC

35-37^oC

Pinus wallichiana pinus roxbugil Abies pindrow picea smithiana Cederous deodara are plants of

Choose an answer

Coniferous alpine and boreal forests

Temperate deciduous forests

Tropical rain forests

Grassland ecosystem

Which plants have the adaptation to remove the flooding of its cells in fresh water

Choose an answer

Xerophytes

Mesophytes

Hydrophytes

Chondrocytes

Air is being polluted rapidly due to

Choose an answer

Industrialization

Automobiles

Sewage

Both a & b

In amoeba movement takes place by means of

Choose an answer

Cilium

Flageilum

Pseudopodium

Myonemes

Innate behaviour is a collection of responses that are predetermined by the

Choose an answer

Heritage

Birthright

Inheritance

Legacy

In sub humid tropical grassland rate of primary production is more than

Choose an answer

2000 g/m²

3000 g/m²

4000 g/m²

6000 g/m²

Downs syndrome (Mongolism) occurs in man during which 21^st chromosome falls to segregate resulting gamete with

Choose an answer

20 chromosomes

21 chromosomes

22 chromosomes

24 chromosomes

At cytokinesis in plants a membrane structure phragmoplast is formed from vesicles which originate from

Choose an answer

Lysosomes

Centrioles

Golgi complex

Glyoxisomes

Intelligence is also a case of polygenic inheritance which is strongly influenced by

Choose an answer

Genes

Environment

Experience

Nature

Cortisol brings about an increase in blood glucose level mainly by its production from protein and by

Choose an answer

Insulin

Glucagons

Oestrogen

Progesterone

Primary tissue is added by the

Choose an answer

Lateral meristem

Underground meristem

Apical meristem

Vertical meristem

A cluster of neuron's cell bodies form

Choose an answer

Ganglia

Cyst

Lump

Swelling

Amphibians wriggle along the belly on the gound with the help of segmentally arranged

Choose an answer

Muscles

Scales

Skin patches

Both a & b

A pesticide is a chemical which destroys agricultural

Choose an answer

Pests

Competitors

Crops

Both a & b

Nuclear membrane disorganizes at the beginning of

Choose an answer

Prophase 1

Metaphase 1

Anaphase 1

Telophase 1

A plant has a growth pattern called

Choose an answer

Open growth

Closed growth

Round growth

Shape of the plant cell does not change greatly compared with an animal cell because it is surrounded by a rigid

Choose an answer

Cell membrane

Capsule

Sheath

Cell wall

Evolutionary relationships among species are reflected in their

Choose an answer

DNA and proteins

Emigration

Immigration

Inheritance

Digitigrade mammals tend to walk on their

Choose an answer

Soles

Digits

Tips of toes

None of these

Armadillos the armoured mammals live only in the

Choose an answer

Africa

America

Europe

Asia

In myelinated neurons the impulse jumps from node to node (node of Ranvier) This is called

Choose an answer

Myelinated impulse

Jumping impulse

Saltatory impulse

None of these

Auxins promote growth of roots from

Choose an answer

Cutting

Calluses

Both a & b

Layering

In 1953 Watson and Crick proposed structure of the

Choose an answer

RNA molecule

ATP molecule

DNA molecule

NAD molecule

Clearance of vast areas of forest for lumber planting subsistence crops or grazing cattle is called as

Choose an answer

Deforestation

A-forestation

Forestation

Both a & b

Among the birds Drawin collected 13 types of

Choose an answer

Finshes

Robins

Ferrets

Pterodactyls

Coniferous forests located at high latitude are called

Choose an answer

Alpine

Boreal

Arctic

Both a & b

Littoral invertebrate animals include

Choose an answer

Small crustaceans

Insect larvae

Snail flatworms

All a,b,and c

The concentrations of cell bodies of neuron are

Choose an answer

Ganglia

Dendrites

Axons

Nodules

A monochromat can perceive

Choose an answer

Three colours

Yellow colours

Only ane colour

Two colours

Long-day plants will flower in short days if the interrupted period is

Choose an answer

Long night

Short Night

Long day

Short day

Antidluretric hormone (ADH) released from posterior pituitary act to actively transport water from filtrate to kidney's

Choose an answer

Pelvis

Medulla

Cortex

Interstitium

The fossil fuels are

Choose an answer

Coal

Oil

Gas

All a,b and c

The Syndrome which is an example of trisomy of the sex chromosome is

Choose an answer

Turner's syndrome

Down's syndrome

Klinefelter's syndrome

Tay-Sach's syndrome

In prokaryote within promoter there are two binding sites TTGACA also called -35 sequence and TATAAT also called

Choose an answer

-10 sequence

- 20 sequence

- 30 sequence

- 35 sequence

In the double helix of DNA adenine forms two hydrogen bonds with

Choose an answer

Thymine

Guanine

Cytosine

Uracil

If fertilization does not occur the corpus luteum starts

Choose an answer

Progesterone

Menstrual cycle

Degenerating

Regenerating

Each intervetebral disc is a cushion like pad composed of

Choose an answer

Nucleus pulposus

Annulus fibrosus

Stomium globosus

Both a & b

In the eighteenth century organisms were classified by

Choose an answer

Charles Darwin

Alfred Wallace

Carolus Linnaeus

J.B Lamarck

Genes that code for therapeutic and diagnostic proteins are incorporated into the animal's DNA and the proteins appear in the animal's

Choose an answer

Urine

Blood

Sweat

Milk

Adenine and guanine are called

Choose an answer

Purines

Pyrmidines

Both a & b

None of these

Histones are positively charged due to an abundance of the basic amino acids

Choose an answer

Arginine

Lysine

Both a & c

Alanine

in plants regeneration is the basis of plant

Choose an answer

Fishes

Amphibian

Reptiles

Birds

The simplest form of learning is

Choose an answer

Habituation

Latent learning

Imprinting

Insight learning

Some dominant trees of temperate deciduous forests are

Choose an answer

Taxus baccata

Pinus wallichiana

Berberis lyceum

Both a,b and c

Antidiuretic hormone is also called

Choose an answer

Oxytocin

ACTH

Vasopressin

Both a & b

Cardiac muscles are muscles of the

Choose an answer

Liver

Stomach

Kidney

Heart

Which one is Tall grass

Choose an answer

Andropogon

Panicum

Both a & b

Stipa

German botanist Gottlieb Haberlandi said in 1902 that plant cells are

Choose an answer

Totipotent

Potent

Totipersausive

Totistrong

Human cells have 46 chromosomes consisting of

Choose an answer

20 pairs

21 pairs

22 pairs

23 pairs

A form of air pollution in which airbone acids produced by electric utility plants and other sources fall to Earth in distant regions is

Choose an answer

Acid rain

Basic rain

Heavy rain

Drizzling

If a man of M blood group marries a woman of N blood group all their childern will have blood group

Choose an answer

MM

NN

MN

None of these

Blue cone monochromacy is also called

Choose an answer

Red - green colour blindness

Red - blue colour blindness

Green - blue colour blindness

Yellow - blue colour blindness

Annual rain fall in deserts is less than

Choose an answer

25 to 50 cm

10 to 22 cm

15 - 25 cm

20 to 40 cm

A callus is an undifferentiated group of

Choose an answer

Cells

Tissues

Organs

Systems

All the 64 codons were tested by

Choose an answer

Marshall Nirenberg

Philip Leader

Har Gobind Khorana

All a,b,and,c

A pair of kidneys consists of millons of functional units called

Choose an answer

Nephrons

Neurons

Dendrons

Flatirons