Question # 1

Tundra ecosystem is a vast treeless region bordering the:

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Pacific ocean

Atlantic ocean

Arctic ocean

Arabian sea

Substances cross the cell membrane more easily when they are

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water soluble

protein soluble

alcohol soluble

lipid soluble

The body of a Hydra can be divided in two equal halves vertically in

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One plane only

Two planes

Three planes

Any plane

Parasites that live inside the body of the host:

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Endoparasites

Ectoparasites

Mesoparasites

Both a & c

What are chances for having Rh-ve baby if one parent is Rh+ve and (homozygous) and other is Rh-ve

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25%

50%

100%

0%

Fungi as well as bacteria are generally known as

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Producers

Consumers

Decomposers

None

The study of relationship of an organism to their environment is knows as:

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biology

ecology

zoology

mycology

Deficiency of sex hormones in adults results in

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Sexual immaturity

Mortality

UTI

sterility

The intake of liquid material across the cell membrane is called as

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Phagocytosis

Pinocytosis

Endocytosis

Exocytosis

Pyramid always starts at

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T₁

T₂

T₃

T₄

Sickle cell mutation affects

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One beta chain

Both beta chains

Only alpha chain

None of the alpha or beta chain

Abiotic factors include:

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Geomagnetism

Gravity

Water

All these

Blood pressure is also an example of _______ trait

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Multifactorial

Qualitative

Single genic

Both a & b

The concept that all living things came into existence in their present forms especially created by Nature is called as

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Theory of special creation

Theory of special selection

Theory of natural creation

Theory of natural selection

Mutation may be caused by

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Chemicals

Radiations

Mutagens

All of these

What happens when both alleles of a gene pair independently express in a heterozygote?

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dominance

incomplete dominance

over dominance

codominance

The productivity of aquatic ecosystem is basically determined by the:

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Light and nutrients

Light and carbohydrates

Light and proteins

Light and minerals

Which of the following reaction is reverse of others

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Hydrolysis

Decondensation

Decomposition

Condensation

All food chain and food web begin with:

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Producers

Consumers

Decomposers

Prey

Between 80 to 90% of the original energy is lost as heat as a byproduct of

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Photosyntheis

Urine

Respiration

All of the above

Part of brain that is involved in learning

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Cerebrum

Thalamus

Cerebellum

Pons

An association between two organisms, which brings benefit to both the organisms is called:

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Parasitism

Commensalisms

Predation

Symbiosis

Tritanopia is blindness of

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Red Colour

Green Colour

Blue Colour

Pink Colour

Predator-prey relationship has a significant influence on:

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Distribution of organisms

Abundance of organisms

Both a & b

Non-availability of organisms

The major components of ecosystem are

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2

3

4

6

The idea of endosymbiont hypothesis was first proposed by:

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Lynn marguils

Wallace

Karlene Schwartz

Lamarck

Parasites which live inside the host body is called:

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Ectoparasite

Endoparasite

Intestinal parasite

Muscular parasite

The pairs of gills present in cyclostomata are

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5-7

10-12

6-14

4-5

Three principal stages of nitrogen cycle are:

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Ammonification, Nitrification, and Assimilation

Ammonification, Acidification, and Assilimlation

Esterification, Nitrification, and Assimilation

Ammonification, Nitrification, and Denitrification

Establishment of new forest at places where no forests existed previously is called

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Reforestation

Afforestration

Deforestration

Both a and b

Pick up the wrong statement from the following

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Oils are lighter than water

Animal fats are solid at room temperature

Specific gravity of fats is higher than water

Fats containing saturated fatty acids are solid

The smallest known virus is

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HIV virus

HBV virus

Influenza virus

Polio virus

On an average, there are 50 or more thylakoids piled to form one

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Intergranum

Crista

Granum

F_{_1}particle

How many nitrogen atoms are found in lecithin

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1

2

3

4

Which one of the following always contains DNA?

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Centriole

Lysosome

Golgi apparatus

Mitochondrion

We are reducing natural 'carbon dioxide's

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Sources

Sinks

Both

None

Ozone is present at about ________ km above earth

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5 -10

10 - 20

10 - 40

10 - 50

Insect and flower relationship is the example of

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Mutualism

Commensalism

Parasitism

All of above

How many number of autosomal chromosome pairs are present in human

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22

33

44

46

Parasites live outside of the body are

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Ectoparasites

Exoparasites

Endoparasites

All of these

Similar groups of individuals who can interbreed and produce organisms of their own kind form a:

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population

community

species

succession

The relationships between insects and flowering plants is an example of:

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Parasitism

Predation

Mutualism

None of these

Head of T4 bacteriophage contain

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Single stranded DNA

Double stranded DNA

Single stranded RNA

Both RNA and DNA

The gross production of an ecosystem is its total

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Photosynthesis

Net production

Photosynthate

Biomass

Global warming is due to

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CFC's

SO₂

O₃depletion

CO₂

The rate of enzyme action will be minimum at

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Optimum pH

Optimum temperature

Optimum conditions

Maximum temperature

Nutrients required by organism in large amount like water, carbon, hydrogen, oxygen, nitrogen, phosphorus, sulphur and calcium are:

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Macronutrients

Micronutrients

Mega Nutrients

Both a & c

The combination of many food chains is termed as

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Food chain

Food web

Trophic level

None of above

Tape worm is the example of

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Endoparasite

Ectoparasite

Outer parasite

All of above

A dominant plant of temperate deciduous forests is the :

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Euphorbia

Taxus baccata

cactus

Acacia

Diseases in living organisms caused by parasites are called:

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Infestations

Plaques

Influxes

Swarms

Example of a virus having tadpole shape consisted of head and tail

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Bacteriophage

Polio virus

HIV

HV

Insulin receptors are present in

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Cytoplasm of muscle cells

Cell membrane of liver cells

Cell membrane of muscles and liver cells

Cell membrane of all body cells

Global warming is the result of

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Ozone layer depletion

Acid rain

Green house gases

All of them

Biosphere is spread over the surface of plant earth, extending upto:

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8 to 10 km

5 to 6 km

10 to 20 km

8 to 16 km

Biosphere is spread out over the surface of planet earth extending about:

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2/4 km

4/6 km

6/8 km

8/10 km

Each biome consists of a combination of plants and animals in the fully developed

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Climax community

Community

Population

None of above

X and Y linked genes are also called as

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Sex genes

Dominant genes

Autosomal genes

Pseudoautosomal genes

In 1917, Joseph Grinnell an American ornithologist first proposed the term niche in:

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Taxonomy

Neurology

Ecology

Embryology

The organisms of same species live in a same place is called

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Community

Population

Consumers

All of these

Body of _____ consists of segments called proglottids which contains mainly sex organ

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Planaria

Fasciola

Ascaris

Tapeworm

______form the raw material for coenzyme

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Nucleic acid

Lipids

Vitamins

Proteins

------------------- are the autotrophs that capture and bring light energy into ecosystem

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Decomposers

Algae

Producers

None o these

The major unit of ecology is the:

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Physical component

Biotic component

Ecosystem

Logos

Pick up the correct sequence of path followed by a testosterone molecule till its export

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SER>RER>Transport vesicle>Golgi apparatus>secretory vesicle>cell membrane

SER>Golgi apparatus>Transport vesicle> secretory vesicle>cell membrane

SER>RER>Golgi apparatus> Transport vesicle>secretory vesicle>cell membrane

SER>Transport vesicle>Golgi apparatus>secretory vesicle>cell membrane

Which type of hepatitis leads to chronic liver disease?

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Hepatitis D

Hepatitis A

Hepatitis B

Hepatitis C

Major cells infected by HIV are

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Monocytes

B lymphocytes

T lymphocytes

RBC

Which of the following is not a homopolysccharide?

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Starch

Chitin

Pectin

Glycogen

Non-neural cells which encapsule the axon of neurons are

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Microglial

Microbodies

Schwann cells

Companion cells

Snails are the intermediate hosts of

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Fasciola hepatica

Schistoma

Taenia solium

Ancyclosoma duodenale

Which enzyme deficiency leads to phenylketonuria

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Phenylalanine oxidase

Phenylalanine hydroxylase

Phenylalanine synthase

Phenylalanine carboxylase

When bacteria in soil oxidize ammonia or ammonium ions this is called:

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Oxidation

Denitrification

Ammonification

Nitrification

Green, plants are basically:

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Producers

Consumers

Decomposers

None of these

Newly synthesized Large proteins are digested into small viral proteins by

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Host protease

Viral protease

Viral RT

Host pepsin

Which one of the following is not the main ionic nutrient

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Ca

Na

K

U

Motor neurons are

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Multipolar

Bipolar

Unipolar

Tripolar

The simplest mono saccharide containing keto group is:

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Glyceraldehyde

Glucose

Dihydroxyacetone

Ribose

What is done to monkeys by HIV

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Multiplication and disease

Infection and multiplication

Infection and disease

None

Catalase and chymotrypsin have similar

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Substrate

Product

Optimum pH

Metabolic impact

Joining of viral DNA with host DNA is carried out by

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Integerase

Ligase

Both

Polymerse

Which of the following bond is not present in tertiary structure of proteins

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Peptide

Hydrogen

Ionic

Ester