Which of the following statements is true of yeast?

1

(a)

The cell divides by binary fission.  One of them develops into a bud.

(b)

The cell divides unequally.  The smaller cell develops into a bud.

(c)

The cell produces conidia, which develop into a bud.

Which one of the following statements is true of cucurbits?

1

(a)

It is monoecious producing both staminate and pistillate flowers in the same plant.

(b)

It is monoecious producing staminate and pistillate flowers in two different plants.

(c)

It is dioecious producing staminate flowers in one plant and pistillate flowers in another.

Transverse binary fission occurs in

1

(a)

Euglena

(b)

Amoeba

(c)

Hydra

(d)

Paramecium

In which of the following organism, self-fertilization is seen?

1

(a)

Fish

(b)

Roundworm

(c)

Earthworm

(d)

Liver fluke

Which of the following animal is having longitudinal binary fission?

1

(a)

Euglena

(b)

Plasmodium

(c)

Planaria

(d)

Paramecium

(e)

Hydra

Spermatids are transformed into spermatozoa by

1

(a)

Spermiation

(b)

Spermatogenesis

(c)

Meiosis

(d)

Spermatosis

(e)

Spermiogenesis

When seeds are attached to parent plant the type of germination is known as

1

(a)

Ovipary

(b)

Epigeal

(c)

Vivipary

(d)

Hypogeal

Sexual reproduction in fungi may occur by means of

1

(a)

Zporangiospore

(b)

Zoospore, oospore and ascospore

(c)

Sporangiospore, ascospore and basidiospore

(d)

Oospore, ascospore and basidiospore

vegitative propagation in mint occurs by 

1

(a)

Offset

(b)

Rhizome

(c)

Sucker

(d)

Runner

Which of the following statements support the view that elaborate sexual reproductive process appeared much later in the organic evolution.
(i)   Lower groups of organisms have simpler body design.
(ii)  Asexual reproduction is common in lower groups.
(iii) Asexual reproduction is common in higher groups of organisms
(iv) The high incidence of sexual reproduction in angiosperms and vertebrates

1

(a)

(i) and (ii)

(b)

(i) and (iii)

(c)

(ii) and (iv)

(d)

(ii) and (iii)

The plant part which consists of two generations one within the other, is

1

(a)

Germinated pollen grain

(b)

seed

(c)

Unfertilized ovule

(d)

Embryo

Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?

1

(a)

Amphitropous

(b)

Circinotropous

(c)

Atropous

(d)

Anatropous

Which one of the following is surrounded by a callose wall?

1

(a)

Male gamete

(b)

Egg

(c)

Pollen grain

(d)

Microspore mother cell

A type angiosperm embryo sac at maturity is

1

(a)

4 nucleate - 2 celled

(b)

8 nucleate - 7 celled

(c)

4 nucleate - 4 celled

(d)

8 nucleate - 4 celled

(e)

2 nucleate - 1 celled

Does ornithophily refer to the pollination by which of the following?

1

(a)

Insects

(b)

Birds

(c)

Snails

(d)

Air

Wind-pollinated flowers are

1

(a)

small producing nectar and dry pollen

(b)

small brightly colored producing a large number of pollen grains

(c)

small producing large no.of pollen grains

(d)

;large producing abundant nectar and pollen

Transfer of pollen grains from anther to stigma of another flower on the same plant called

1

(a)

autogamy

(b)

xenogamy

(c)

geitonogamy

(d)

Karyogamy

In double fertilization

1

(a)

Two male gametes fuse with two eggs

(b)

One male gamete fuse with the egg and the other fuses with secondary nucleus

(c)

One male gamete fuses with egg and the other fuses with antipodal

(d)

One male gamete fuses with antipodal and the other fuses with diploid nucleus

Wind pollination is common in

1

(a)

legumes

(b)

lilies

(c)

grasses

(d)

orchids

Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because

1

(a)

female gametophyte is free and gets dispersed like seeds

(b)

female gametophyte lacks archegonia

(c)

megaspores posses endosperm and embryo surrounded by seed coat

(d)

embryo develop in female gametophyte which is retained on the parent sporophyte

Which among the following has 23 chromosomes?

1

(a)

Spermatogonia

(b)

Zygote

(c)

Secondary oocyte

(d)

Oogonia

Which of the following hormones is not secreted by human placenta?

1

(a)

hCG

(b)

Estrogens

(c)

Progesterone

(d)

LH

Seminar plasma in human males is rich in

1

(a)

ribose and potassium

(b)

fructose and calcium

(c)

glucose and calcium

(d)

DNA and testosterone

Which layer develops first during embryonic development?

1

(a)

ectoderm

(b)

mesoderm

(c)

endoderm

(d)

both (b) and (c)

The 32 cells stage of the human embryo is

1

(a)

smaller than fertilized egg

(b)

same size as the fertilized egg

(c)

two times of the size of the fertilized egg

(d)

four times of the size of the fertilized egg

In the absence of acrosome, the sperm

1

(a)

Cannot get food

(b)

cannot swin

(c)

cannot penetrate the egg

(d)

cannot get energy

Ina normal pregnant woman, the amount of total gonadotropin activity was assessed. the result expected was

1

(a)

High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo

(b)

High level of circulating HCG to stimulate endometrial thickening

(c)

High level of FSH and LH in uterus to stimulate endometrial thickening

(d)

high level of circulating Hcg to stimulate estrogen and progesterone synthesis

Diaphragms are contraceptive devices used by the females. Choose the correct option from the statements given below:
(i)  They are introduced into the uterus
(ii)  They are placed to cover the cervical region
(iii) They act as physical barriers for sperm entry
(iv)  They act as spermicidal agents

1

(a)

(i) and (ii)

(b)

(i) and (iii)

(c)

(ii) and (iii)

(d)

(iii) and (iv)

In-vitro fertilization is a technique that involves transfer of which one of the following into the fallopian tube??

1

(a)

Zygote only

(b)

Embryo only, upto 8 cell stage

(c)

Either zygote or early embryo foetus

(d)

embryo of 32 cell stage

The permissible use of the technique amniocentesis is for

1

(a)

detecting any genetic abnormally

(b)

detecting sex of the unborn foetus

(c)

artificial insemination

(d)

transfer of embryo into the uterus of a surrogate mother

Cu-T prevents pregnancy by preventing

1

(a)

Fertilization

(b)

ovulation

(c)

implantation of fertilized egg

(d)

none of these

It is a disease which mainly affects mucous membrane of urinogenital tract. In males, burning feeling on passing urine, after a yellow discharge occurs, that is accompanied by fever, headache and feeling of illness. Its name is

1

(a)

syphilis

(b)

gonorrhoea

(c)

AIDS

(d)

none of these.

Female heterogamy is found in

1

(a)

Birds

(b)

Grasshopper

(c)

Both a and b

(d)

Drosophila

In a monohybrid cross involving incomplete dominance the phenotypic ratio equals the genotypic ratio in F₂ generation. The ratio is

1

(a)

3 : 1

(b)

1 : 2 : 1

(c)

1 : 1 : 1 : 1

(d)

9 : 7

In the F₂ generation of a Mendelian dihybrid cross the number of phenotypes and genotypes are :

1

(a)

phenotypes - 4; genotypes - 16

(b)

phenotypes - 9; genotypes - 4

(c)

phenotypes - 4; genotypes - 8

(d)

phenotypes - 4; genotypes - 9

Which one of the following symbols and its representation, used in human pedigree analysis is correct.

1

(a)

(b)

(c)

(d)

Test cross is a cross between :

1

(a)

Hybrid X dominant parent

(b)

Hybrid X Recessive parent

(c)

Hybrid X Hybrid parent

(d)

Two distantly related species

Which of the following conditions is called monosomics ?

1

(a)

2n + 1

(b)

2n + 2

(c)

n + 1

(d)

2 n - 1

The number of linkage group(s) present in Escherishia coil is :

1

(a)

1

(b)

2

(c)

3

(d)

7

During splicing, the exons are joined and the  enzyme which catalyzes this reaction is

1

(a)

RNA ligase

(b)

RNA catalase

(c)

RNA permease

(d)

RNA polymerase

mRNA directs the building of proteins through a sequence of

1

(a)

Exons

(b)

Introns

(c)

Codons

(d)

Anticodons

Regulatory proteins are the accessory proteins that interact with RNA polymerase and affect its role in transcription. Which of the following statements is correct about regulatory protein?

1

(a)

They only increase expression

(b)

They only decrease expression

(c)

They interact with RNA polymerase but do not affect the expression

(d)

They can act both as activators and as repressors

The unequivocal proof of DNA as the genetic material came from the studies on a

1

(a)

bacterium

(b)

fungus

(c)

viroid

(d)

bacterial virus

PCR and Restriction Fragment Length polymorphism are the methods for:

1

(a)

Study of enzymes

(b)

Genetic transformation

(c)

DNA sequencing

(d)

Genetic fingerprinting

In the developmental history of mammalian heart, it is observed that it passes through a 2-chambered fish-like heart, 3-chanbered frog-like heart and finally 4-chambered stag. To which hypothesis can the above statement be approximated?

1

(a)

Biogenetic law

(b)

Hardy-Weinberg law

(c)

Lamarck's principle

(d)

Mendelian principles

The finches of Galapagos islands provide an evidence in favour of

1

(a)

evolution due to mutation

(b)

retrogressive evolution

(c)

biogeographical evolution

(d)

special creation

Chemical theory of origin of life was given by

1

(a)

Stanley Miller

(b)

Spallanzani

(c)

Oparin and Haldane

(d)

Louis Pasteur

Match the scientists and their contributions in the fields of evolution

Name of the Scientist	Contributions
(A) Charles Darwin	(1) Mutation theory
(B) Lamarck	(2) Germplasm theory
(C) Hugo De Vries	(3) Philosophie Zoologique
(D) Ernest Haeckel	(4) The origin of species
(E) August Weismann	(5) Biogenetic law
	(6) Essay on populations

1

(a)

A-4,B-3,C-1,D-5,E-2

(b)

A-4,B-3,C-5,D-1,E-6

(c)

A-4,B-4,C-5,D-3,E-1

(d)

A-2,B-3,C-1,D-5,E-2

(e)

A-3,B-4,C-1,D-5,E-2

Which one of the following periods is largely associated with extinction of dinosaurs and the increase in flowering plants and reptiles?

1

(a)

Jurassic

(b)

triassic

(c)

cretaceous

(d)

permian

Which one of the following options gives one correct example each of convergent evolution and divergent evolution?

1

(a)

Convergent evolution	Divergent evolution
Eyes of octopus and mammals	Bones of forelimbs of verebrates

(b)

Convergent evolution	Divergent evolution
Thorns of Bougainvillia	Wings of butterflies and birds

(c)

Convergent evolution	Divergent evolution
Bones of forelimbs of vertebrates	Wings of butterfly and birds

(d)

Convergent evolution	Divergent evolution
Thorns of Bougainvillia and tendrils of Cucurbita	Eyes of Octopus and mammals

According to abiogenesis life orginated from

1

(a)

Nonliving

(b)

other planets

(c)

Preexisting life

(d)

spontaneously

(e)

chemicals

If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence?

1

(a)

Serum globulins

(b)

Fibrinogen in the plasma

(c)

Haemocytes

(d)

Serum albumins

Filariasis is caused by

1

(a)

Dead adult filariae

(b)

Microfilariae

(c)

Biting of filarial worm

(d)

Presence of bacteria in filarial wall

Choose the wrong statement regarding AIDS

1

(a)

AIDS is an innunodefiency disease.

(b)

It is caused by retrovirus HIV

(c)

HIV selectively infects and kills B-lymphocytes

(d)

Retroviruses have RNA genomes that replicate via DNA intermediate

(e)

Viral RNA genome is converted into DNA copy by reverse transcriptase

If the person shows the production of interferons in his body, chances are that he suffering from

1

(a)

Measles

(b)

Tetanus

(c)

Anthrax

(d)

Malaria

Which of the following pairs of diseases is viral as well as transmitted by mosquitoes?

1

(a)

Elephantiasis and dengue

(b)

Yellow fever and sleeping sickness

(c)

Encephalitis and sleeping sickness

(d)

Yellow fever and dengue

Most cultivated plants are

1

(a)

Autopolyploids

(b)

Allopolyploids

(c)

Aneuploids

(d)

Haploids

Somaclonal variation can be obtained by

1

(a)

Application of colochicine

(b)

Hybridisation

(c)

Irradiation with gamma rays

(d)

Tissue culture

The species of saccharum originally grown in India was

1

(a)

S.officinarum

(b)

S.Barberi

(c)

S.oulardii

(d)

S.munja

'Jaya' and Ratna' developed for green revolution in India are the varieties of

1

(a)

maize

(b)

rice

(c)

wheat

(d)

bajra

Which one of the following is a bread of cattle?

1

(a)

Aryshire

(b)

Ghagus

(c)

Kadakanath

(d)

Scampi

Bacillus thuringiensis (Bt) strains have been used for designing novel

1

(a)

Biofertilizers

(b)

Bio-metallurgical techniques

(c)

Bio-mineralization processes

(d)

Bio-insecticidal plants

Which one of the following is not used as a biopesticide?

1

(a)

Trichoderma harzianum

(b)

Nuclear polyhedrosis virus (NPV)

(c)

Xanthomonas campestris

(d)

Bacillus thuringiensis

Mycorrhiza does not help the host plant in:

1

(a)

Enhancing its phosphorus uptake capacity

(b)

Increasing its tolerance to drought

(c)

Enhancing its resistance to root pathogens

(d)

Increasing its resistance to insects

Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statements is not correct during the process?

1

(a)

Leghaemoglobin scavenges oxygen and is pinkish in colour.

(b)

Nodules act as sites of nitrogen fixation.

(c)

The enzyme nitrogenase catalyses the conversion of atmospheric N₂ to NH₃

(d)

Nitrogenase is insensitive to oxygen.

Which one of the following is used as biological insecticide

1

(a)

Tiger beetle

(b)

Caterpillar

(c)

Silk moth

(d)

Mazra Poka

Bacillus thuringiensis is used to control

1

(a)

bacterial pathogens

(b)

fungal pathogens

(c)

nematodes

(d)

insect pests

Ethanol is commercially produced through a particular species of

1

(a)

Saccharomyces

(b)

Clostridium

(c)

Trichoderma

(d)

Aspergillus

The process of reverse transcription was brought to light by the work of

1

(a)

George Beadle and Edward Tatum

(b)

Garrod

(c)

H.W. Temin and D. Baltimore

(d)

R.W. Holley and Grover

(e)

Marshall and W. Nirenberg

Find out the wrong statement

1

(a)

Mobile genetic elements, transposons were visualized by Barbara Mc. Clintock

(b)

Udder cell, a somatic cell is used to produce the cloned sheep by nuclear transplantation method.

(c)

In pedigree analysis, a person immediately affected by an action is called propositus.

(d)

Dr. Ian Wilmut produced a cloned sheep called Dolly.

(e)

DNA ligases are used to cleave a DNA molecule.

Polyethylene glycol method is used for

1

(a)

Biodiesel production

(b)

Seedless fruit production

(c)

Energy production from sewage

(d)

Gene transfer without a vector

Read the following four statements (A-D) about certain mistakes in two of them:
(A) The first transgenic buffalo, Rosie produced milk which was human alpha-lactalbumin enriched
(B) Restriction enzymes are used in isolation of DNA from other macromolecules
(C) Downstream processing is one of the steps of rDNA technology
(D) Disarmed pathogen vectors are also used in transfer of rDNA into the host
Which of the two statements have mistakes?

1

(a)

B and C

(b)

C and D

(c)

A and C

(d)

A and B

Which one of the following is a case of wrong matching?

1

(a)

Somantic hybridization - Fusion of two diverse cells

(b)

Vector DNA-Site for t-RNA synthesis

(c)

Micropropagation - In vitro production of plants in large numbers

(d)

Callus - Unorganised mass of cell produced in tissue culture

Insect resistance trangenic cotton has been produced by inserting a piece of DNA from

1

(a)

an insect

(b)

a bacterium

(c)

a wild relative of cotton

(d)

a virus

A genetically engineered micro-organism used successfully in bioremediation of oil spills is a species of

1

(a)

Trichoderma

(b)

Xanthomonas

(c)

Bacillus

(d)

Pseudomonas

In cloning of cattle a fertilized egg is taken out of the mother's womb and

1

(a)

In the eight cell stage, cells are separated and cultured until small embryos are formed which are implanted into the womb of other cows

(b)

In the eight cell stage, the individual cells are separated under electrical field for further development in culture media

(c)

From this upto eight identical twins can be produced

(d)

The egg is divided into 4 pairs of cells which are implanted into the womb of other cows

The bacterium bacillus thuringiensis is widely used in contemporary biology as

1

(a)

Insecticide

(b)

Agent for production of dairy products

(c)

Source of industrial enzyme

(d)

Indicator of water pollution

The first clinical gene therapy was given for treating

1

(a)

diabetes mellitus

(b)

chicken pox

(c)

rheumatoid arthritis

(d)

adenosine deaminase deficiency

Popluation density of terrestrial organism is measured in terms of individual per

1

(a)

meter³

(b)

meter⁴

(c)

meter

(d)

meter²

Match the following with correct combination

Column I	Column II
A. Camouflag	1. Dendrobates purnilio
B. Batesian mimicry	2. Horse-shoe bat
C. Warning colouration	3. Monarch butterfly
D. Echolocation	4.Praying mantis

1

(a)

A-2,B-4,C-3,D-1

(b)

A-2,B-4,C-2,D-1

(c)

A-4,B-1,C-3,D-2

(d)

A-4,B-3,C-1,D-2

(e)

A-3,B-4,C-1,D-2

Parasite can be explained as an organism which depends on others.

1

(a)

for food

(b)

for shelter

(c)

for both food and shelter

(d)

for reproduction

Which one of the following is most appropriately defined?

1

(a)

Host is an organism which provides food to another organism

(b)

Amensalism is a relationship in which one species is benefitted the other is unaffected.

(c)

Predator is an organism that catches and kills other organisms for food

(d)

Parasite is an organism which always lives inside the body of other organism and may kill

The logistic population growth is expressed by the equation

1

(a)

\({ dt }/{ dN }=N\gamma (\frac { K-N }{ K } )\) 

(b)

\({ dN }/{ dt }=\gamma N(\frac { K-N }{ K } )\)

(c)

\({ dN }/{ dt }=\gamma N\)

(d)

\({ dN }/{ dt }=\gamma N(\frac { K-N }{ N } )\)

Secondary producers are

1

(a)

Herbivores

(b)

Producers

(c)

Carnivores

(d)

None of the above

Which of the following process helps in nutrient conservation?

1

(a)

Mineralisation

(b)

Immobilisation

(c)

Leaching

(d)

Nitrification

Maximum absorption of rainfall water is done by 

1

(a)

tropical deciduous forest

(b)

tropical evergreen forest

(c)

tropical savannah

(d)

scrub forest

Which one of the following is not used for construction of ecological pyramids?

1

(a)

fresh weight 

(b)

dry weight 

(c)

number of individuals

(d)

rate of energy flow

Which one of the following ecosystem types has the highest annual net primary productivity?

1

(a)

tropical deciduous forest

(b)

temperate evergreen forest

(c)

temperate deciduous forest

(d)

tropical rain forest

Nutrient enrichment of a lake will cause

1

(a)

eutrophication

(b)

stratification

(c)

biomagnification

(d)

bioaccumulation

The second stage of hydrosere is occupied by plants like

1

(a)

Azolla

(b)

Typha

(c)

Salix

(d)

Vallisneria

Minamata disease was caused due to the consumption of

1

(a)

Sea food containing lot of cadmium

(b)

Fish contaminated with mercury

(c)

Oysters with lots of pesticide

(d)

Sea food contaminated with selenium

Which of the following is being utilized as a source of biodiesel in the Indian countryside?

1

(a)

beetroot

(b)

sugarcane

(c)

Pongamia

(d)

Euphorbia

Ozone is spread in the swimming pool because

1

(a)

it acts as disinfectant

(b)

it absorbs UV radiations

(c)

ozone is easily available from O₂

(d)

all of the above

SO₂ pollution is indicated by

1

(a)

Desmodium (grasses)

(b)

Sphagnum (mosses)

(c)

Usnea (lichens)

(d)

Cucurbita (Climbers)

Which one of the following is a wrong statement?

1

(a)

Most of the forests have been lost in tropical areas

(b)

Ozone in upper part of atmosphere is harmful to animals.

(c)

Greenhouse effect is a natural phenomenon.

(d)

Eutrophication is a natural phenomenon in freshwater bodies.

What is the main cause for the extinction of some species in a tropical forest?

1

(a)

Deforestation

(b)

afforestation

(c)

pollution

(d)

soil erosion

In India, We find mangoes with different flavors, colors, fiber content, sugar content and even shelf-life.The large variation is on account of

1

(a)

species diversity

(b)

Induced mutations

(c)

genetic diversity

(d)

hybridization

Which one of the following is not observed in biodiversity hotspots?

1

(a)

lesser inter-specific competition

(b)

species richness

(c)

endemism

(d)

accelerated species loss

Which of the following group of plants exhibit more species diversity?

1

(a)

Angiosperms

(b)

Algae

(c)

Bryophytes

(d)

Fungi

India's share in the global species diversity is about

1

(a)

2%

(b)

4%

(c)

6%

(d)

8%