Question # 1

The chief reservoir of nitrogen is the

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Atmosphere

Water

Soil

Rain

Much of nitrogen found in the soil is the result of:

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Degeneration

Decomposition

Denitrification

Assimilation

The pore by which the water leaves the body of sponges is called

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Ostia

Osculum

Spicules

Medreporite

The living organism which can prepare their own food are:

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predators

parasites

producers

prey

Ventral root of the spinal nerve contains

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Sensory nerve fibres

Motor nerve fibres

Mixed nerve fibres

All

Which of the following reaction is reverse of others

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Hydrolysis

Decondensation

Decomposition

Condensation

Eukaryotic ribosomes are composed of an almost equal amount of _____ and proteins

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DNA

RNA

Carbohydrates

Lipids

The parasite that lives inside the body of the host is called as

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Endoparasite

Ectoparasite

Outer parasite

All of above

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

Which of the following things were not collected by Darwin?

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Specimens of diverse faunas and floras of south America

South American fossils

13 types of finches

Turtles

Mycorrhiza is an association of

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Algae with roots of higher plants

Bryophytes with roots of higher plants

Fungi with roots of higher plants

Bacteria with roots of higher plants

Parasitism is an association between a host and a parasite, which ivolves providing the parasite with:

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Food

Protection

Conditions for its survival

All a, b, c

Normal fruit flies have :

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White eyes

Bright red eyes

Light red eyes

Black eyes

The compound formed by the combination of a base and a pentose sugar is called:

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Nucleoside

Nucleic acid

Nucleotide

Nuclein

Macronutrients are required by the organisms in:

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Small amount

Large amount

Traces

Never required

The biotic components of the ecosystem are the

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Producers

Consumers

Producers,consumers and the decomposers

Decomposers

A Cell interacts with its external environment through

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Cell Wall

Nuclear membrane

Plasma membrane

Cytoplasm

Genetic basis of ABO blood group system was explained by:

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Landsteiner

Levine

Bernstein

Carl Correns

The major components of ecosystem are

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2

3

4

6

The semicircular channels and system of tubes found in cytoplasm are known as

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Ribosomes

Glyoxisomes

E.R

Vacuoles

Which enzyme deficiency leads to phenylketonuria

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Phenylalanine oxidase

Phenylalanine hydroxylase

Phenylalanine synthase

Phenylalanine carboxylase

The land will be turned to barren land if there is:

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Little grazing

Moderate grazing

Over grazing

None grazing

Predation decreases by decreasing the prey due to

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Decrease in food

Decrease in water

Decrease in consumers

All of these

Vaccine for___ is under trial administration

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Hep A

Polio

Measles

AIDS

The succession started after destruction of an area is called as

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Primary succession

Secondary succession

Tertiary succession

Quartnary succession

It is incorrect statement about hormones

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Endocrine secretion

Initiate metabolism

Organic

Transported by blood

Melanin pigment is produced under the hormone

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ADH

MSH

STH

TSH

Pick up the correct statement about the following figure:

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2.Nucleolus, 4.Golgi apparatus, 10.cytoplasm, 7.Mitochondria

2.Nucleolus, 7.cell membrane, 9.cytoplasm, 7.Mitochondria

2.Nucleolus, 4.Golgi apparatus, 5.cytoplasm, 7.Mitochondria

2.Nucleolus, 4.Golgi apparatus, 10.cytoplasm, 7.Centriole

In lytic cycle, the relationship between bacterium and bacteriophages is

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Symbiotic

Master-slave

Husband wife

Host-guest

The oxygen concentration in the air is maintained by the green plants which release it during

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Fermentation

Respiration

Photosynthesis

Chemosynthesis

Which of the following is not an enzyme of HIV

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Reverse transcriptase

Integerase

Protease

Ligase

Bacterial and fungi are mainly included in the group of

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Consumers

Decomposers

Producers

None of these

Two parents of blood group A had a child of blood group O, what will be percentage chances of having such child again

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25%

50%

75%

None

Several bacteria in soil are able to oxidize ammonia or ammonium ions, this oxidation is known as:

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Ammonification

Nitrification

Denitrification

Amino-oxidation

______ lichens are the examples of foliose lichens

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Dermatocarpon

Permellia

Both a and b

None of above

Algae are

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Microproducers

Macroproducers

Both A and B

None of above

When Fructose form ring structure, It is

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6 Cornered

5 cornered

4 cornered

3 cornered

The optimum temperature for most of the enzymes in human body is

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37 ^oC

35^oC

37 ^oF

98.6^oC

This is an association between a host and a parasite

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Predation

Anemies

Parasitism

None of above

The establishment of stable vegetation on an area is termed as

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Plant succession

Animal succession

Succession

All of the above

A biotic components includes the components like:

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Air, water, and animals

Air, soil and plants

Air, water and soil,

air, soil, and, animals

Major cells infected by HIV are

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Monocytes

B lymphocytes

T lymphocytes

RBC

Flavin adenine dinucleotide is a

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Prosthetic group

Activator

Coenzyme

Inhibitor

Biosphere is spread out over the surface of planet earth extending about ______ kilometers in the upper reaches of atmosphere and also in same distance into the depths of oceans

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8 - 10

8 - 12

8 - 14

8 - 16

Grazers feed mainly on which kind of plants

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Tree leaves

Shrubs

Grasses

Cereals

Bilirubin

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Turns skin Yellow

Damages brain cells

Causes jaundice

All of these

A lichen is the symbiotic association between a

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Fungus and a bryophyte

Roots of higher plants and an alga

Fungus and an alga

Roots of a higher plants and a fungus

Which of these stages appears as a pioneer during succession on barren land?

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Foliage lichens

Mosses

Crustose lichens

Fruiticose lichens

Dominant plant species in grassland are:

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Graminoids

Trees

Climbers

Herbs

Parapodia are organs of locomotion in ……

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Leech

Planaria

Earthworm

Neries

______ symbiont the root nodules of legume plants

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Virus

Fungi

Bacteria

Nematods

Oxidative metabolism is carried out ____ of mitochondria

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In the intramembrane space

On the surface of inner membrane

In the inside of outer membrane

In the matrix

Slight change in pH can cause

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Denaturation

Crystallization

Ionization

All

In deoxyribose, oxygen is removed from carbon number

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1

2

3

4

Phosphorylation of glucose molecule in glycolysis is carried out by

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ATPase

Kinase

Isomerase

Transferase

Oxides of nitrogen are produced by burning of

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Carbonate

Leaded patrol

Fossil fuels

All of above

A blue cone monochormate

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Can perceivetwo colours

Can't perceiveany colour

Can perceive only blue colour

Can perceive only red colour

It is not a symptom of AIDS

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Swollen lymph nodes

Loss of immunity

Swollen neck

Pneumonia

Several bacteria in soil oxidize ammonia or ammonium ions this oxidation is known as

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Ammonification

Nitrification

Assimilation

All of above

Layer of earth where life is present is called

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Hydrosphere

Lithosphere

Biosphere

Topography

Depolarization of neural membrane is due to

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Influx of K+

Efflux of Na+

Influx of Na+

None

Two main types of environment factors are:

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Geotropism and phototropism

Abiotic and biotic

Land aquatic

None of these

Which of the following is an example of primary succession

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Foliage stage

Moss stage

Hydrosere and xerosere

None of these

The processes that have transformed life on earth from its earliest forms to the vast diversity that we observe today, are collectively referred as

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Evolution

Succession

Revolution

All of above

The study of relationship of a single population to its environment is called:

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Autecology

Synecology

Both a & b

None

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 nutrient cycles are also called:

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Biochemical cycles

Geochemical cycles

Biogeochemical cycles

Elemental cycles

Which of the following hormone affects the supply of testosterone

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LH

GH

FSH

Aldosterone

The bacteria in the root nodules fix ______ in soil air, converting it to amino acids

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Nitrogen

Phosphorus

Sulphur

Iron

The organelle that protect the cell from invading organisms is

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Centriole

Lysosome

Mitochondrion

Vacuole

The attachment of shark and small fish remoras is an example of:

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Mutualism

Parasitism

Predation

Commensalism

bare rocks are the habitats of

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Mosses

Lichens

Grasses

Trees

Chlorofluorocarbons are

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Organic

Inorganic

Intermediate

Solid

The dominance relations of a 4 O'clock plant can be described in terms of

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Complete dominance

Incomplete dominance

Partial dominance

Both B and C

Plants growing in extreme cold soil are called:

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Sciophytes

Psychrophytes

Heliophytes

Cyanophytes

The major unit of ecology is the:

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Physical component

Biotic component

Ecosystem

Logos

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

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Decomposers

Algae

Producers

None o these

The enzyme that works best at intermediate pH is

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Pepsin

Chymotrypsin

Sucrase

Pancreatic lipase

Syrinx produces voice in birds. It is located

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In voice box

Near origin of bronchi

At the upper end of trachea

Inside lungs

Which one of the following is site of oxidative Phosphorylation in mitochondria

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Cristae

Outer membrane

Matric

Ribosome

A process in which green plants are eaten by animals is called

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Grazing

Predation

Commensalization

None of these