Question # 1

The change in structure of community of an ecosystem during a time period is called

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Succession

Evolution

Mutation

Regression

Herbaceous stage in xerosere is the __________:

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First stage

Third stage

Fourth stage

Last stage

Both organisms benefit from the ______ relationship

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Mutualism

Commensalism

Parasitism

All of above

Among the scientists who believed in divine creation as

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Darwin

Carolous Linnaeous

Lamarck

Wallace

The oxidation of ammonia is

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Ammonification

Nitrogen fixation

Nitrification

Denitrification

The succession started after destruction of an area is called as

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Primary succession

Secondary succession

Tertiary succession

Quartnary succession

The deficiency of which one of the following is cause of goiter

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Iodine

Calcium

Potassium

Iron

The cells absent in sponges are

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Chondrocytes

Pinacocytes

Choanocytes

Archeocytes

About 20 years ago what was the rate at which human population was increasing

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1%

2%

3%

5%

Secondary structure is the ultimate structural level of which of the following proteins?

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Trypsin

Insulin

Keratin

Glucose

Motor neurons are

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Multipolar

Bipolar

Unipolar

Tripolar

Which include seral stages of a primary succession are

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Lichen & algae

Mosses and ferns

Grasses & shrubs

All of these

______form the raw material for coenzyme

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Nucleic acid

Lipids

Vitamins

Proteins

The type of association between two organisms, which brings benefit to both the organisms is called

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Commensalism

Predation

Mutualism

Parasitism

Plant and animals replace the earlier ones in a way of

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Community relay

Succession

Predecessors

All of these

Monosaccharides are major component of

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DNA, ATP, RuBP, Lecithin

DNA, NAD, Insulin

DNA, NAD, ATP, RuBP

DNA, RNA, Myosin

X and Y linked genes are also called as

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Sex genes

Dominant genes

Autosomal genes

Pseudoautosomal genes

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

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Parasitism

Commensalisms

Predation

Symbiosis

Resting membrane potential of a neuron is

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50mV

-70mv

-80mV

90mV

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

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Bacteriophage

Polio virus

HIV

HV

Rh factor is encoded by

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2 genes which occupy 3 loci

3 genes which occupy 2 loci

2 genes which occupy 2 loci

3 genes which occupy 3 loci

The competitive inhibitor competes with the

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Enzyme

Cofactor

Substrate

Coenzyme

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

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Grazing

Predation

Commensalization

None of these

Which of the following is not the true about predation

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Prey increases by increasing the predation

Predation increases by increasing the prey

Prey decreases by increasing the predation

Prey must follow the predation

Nucleotide is to ___ as amino acid is to ___

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Nucleic acids, Lipids

Nucleic acids, Proteins

Proteins, Lipids

Lipids, proteins

The hormones which share common hypothalamic factor are

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FSH and LH / ICSH

ACTH and GH

ICSH and LTH

Prolactin and FSH

Major cells infected by HIV are

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Monocytes

B lymphocytes

T lymphocytes

RBC

Charles Eton defined the niche as the species:

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Work

Employment

Job

Occupation

Which of the following hormone affects the supply of testosterone

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LH

GH

FSH

Aldosterone

Ecology is a ______ word.

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German

British

French

Greek

Genetic basis of ABO blood group system was explained by:

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Landsteiner

Levine

Bernstein

Carl Correns

Leech is preferably a

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Host

Parasite

Predator

Mutualist

Catalase and chymotrypsin have similar

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Substrate

Product

Optimum pH

Metabolic impact

Plants growing in extreme cold soil are called:

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Sciophytes

Psychrophytes

Heliophytes

Cyanophytes

The fungi and bacteria, which obtain their energy from the dead and decaying plants and animals are:

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Decomposers

Consumers

Producers

Scanvengers

Retroviruses cause tumors in

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Rodents

Fowls

Cats

All

What is cause of Eutrophication

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Excreta

Phosphate

Nitrates

All

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

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Fermentation

Respiration

Photosynthesis

Chemosynthesis

In mitochondria, small knob like structure called FI particles are found in

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Outer membrane

Inner membrane

Outer compartment

Inner compartment

Two main types of environment factors are:

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Geotropism and phototropism

Abiotic and biotic

Land aquatic

None of these

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%

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

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Oxidation

Denitrification

Ammonification

Nitrification

Actual place or location where an organism lives is called us:

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Niche

Terrain

Habitat

Domain

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

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Degeneration

Decomposition

Denitrification

Assimilation

All populations within an ecosystem are known as a:

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Population

Community

Species

Clan

Isosahedral viruses usually have ___

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10 faces

20 faces

15 faces

5 faces

This is a ------------------- relationship between algae and fungi

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Symbiotic

Mutualistic

Parasitic

Mycorrhizal

Group of interbreeding organisms residing together in space & times are

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Community

Population

Genus

Family

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

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Community

Population

Consumers

All of these

Pick up the correct statement according to induced fit model of enzyme action

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Enzyme induces changes in substrate structure

Substrate induces changes in enzyme structure

Active site of enzyme is a rigid structure

Active site of enzyme is used as a template +

Which of the following acts as a bridge between enzyme and substrate?

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Activator

Cofactor

Prosthetic group

Apo-enzyme

Enzymes cannot work in which of the following

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Aqueous medium

Dry medium

Acidic medium

Alkaline medium

STH promotes_____ after puberty

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Protein synthesis

Cell differentiation

Metabolism

Cell division

Vector for spread of African sleeping sickness is

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Anopheles

Commonhouse fly

Tse-tse fly

Honey bee

The idea of endosymbiont hypothesis was first proposed by:

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Lynn marguils

Wallace

Karlene Schwartz

Lamarck

Patient of AIDS is susceptible to many infections due to

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Severe pneumonia

Swollen lymph nodes

Loss of immune system

All of these

Which of the following properties is incorrect for both mitochondria and chloroplast?

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Both have an electron transport system

ATP synthesis

Both are present in all cells

Both have double membrane structures

Puffiness of hands is the character of

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Graves disease

Addinsons disease

Myxedema

Cretinism

The tundra vegetation supports the animals called:

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lemmings

Marchpolo sheeps

Goats

None of these

Both Glycoprotein and glycolipids are components of

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Plant Cell walls

Algal Cell Walls

Fungal Cell Wall

Biological Membranes

Which type of nucleic acid is found in the capsid of HIV

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RNA

DNA

ssDNA

None

Causative agent of mysterious brain infection is composed of

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DNA+Protein

RNA+Protein

RNA only

Protein only

In lithospheric ecosystem the availability of water is:

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Unlimited

UniForm

Limited

Zero

It acts on smooth muscles

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Insulin

Glucagon

Cortisol

Oxytocin

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

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dominance

incomplete dominance

over dominance

codominance

Fresh water ecosystem cover the land only:

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2%

3%

4%

1%

Which oxides causes headache and brain damage

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Nitrogen

Lead

CO₂

CO

How plants are deprived of nutrients by acid rain

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Due to teaching

Due to fall in pH

Acid creates a barrier to absorption

Unknown cause

The idea of inheritance of acquired characteristics was presented by

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Margulis

Lamarck

Linnaeus

Cuvier

Parapodia are organs of locomotion in ……

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Leech

Planaria

Earthworm

Neries

Overgrazing resulted in

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Diminishing the grasses

Desert

Barren land

All of these

Many cold=blooded animals remain inactive during winter season; it is called:

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Hibernation

Condensation

Morphosis

Proto-operation

Allosteric enzymes have ___ major sites

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1

2

3

4

Tritanopia is blindness of

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Red Colour

Green Colour

Blue Colour

Pink Colour

Which of the following helps in recognition of substrate

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Active site

Catalytic site

Binding site

All

Joseph Grinnell an American scientist was:

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Paleontologist

Embryologist

Ornithologist

All of these

The establishment of stable vegetation on an area is termed as

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Plant succession

Animal succession

Succession

All of the above

Major regional ecological community of plants and animals forms:

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Triomes

Biosphere

Biomes

Biogeography

Which of the following is an example of primary succession

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Foliage stage

Moss stage

Hydrosere and xerosere

None of these

Succession ends with a diverse and relatively stable:

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Xerosere

Derosere

Pioneers

Climax community

Dominant plant species in grassland are:

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Graminoids

Trees

Climbers

Herbs