Question # 1

Formation of ES complex activates the______ site of an enzyme

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Active

Binding

Catalytic

Allosteric

An ecosystem is made up of three main components:

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The herbivores, carnivores and omnivores

The produces, the consumers and the decomposers

Primary, secondary and tertiary consumers

Producers, herbivores and carnivoers

Which hormone require 2nd messenger

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Insulin

Estrogen

Progesterone

Testosterone

The term ecology comes form the ______ words oikos, meaning "The family household"

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Greek

Latin

English

French

Animals involved in the construction of corals are

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Polyps

Medusae

Gonozooids

None

Bacterial live and get food from roots of plants is an example of

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Symbiosis

Mutualism

Parasitism

Infestation

Monoculture is

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One organism

A lab culture

A pure culture

Both b and c

The animals which feed on grasses are called:

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Grassers

Browsers

Grazers

Grazophytes

Which is irrelevant?

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Genome to virus structure

Capsomeres to Capsid

Tumors to retroviruses

Envelope to all viruses

Aerosol spray foams are potential sources of

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Carbon monoxide

Sulphur dioxide

Chlorofluorocarbons (CFCs)

Lead compounds

Ecology is a ______ word.

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German

British

French

Greek

Crystallization of viruses was done by _____ for the first time

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Ivanowsky

Twort

Stanley

Robert Koch

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

Newly synthesized Large proteins are digested into small viral proteins by

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Host protease

Viral protease

Viral RT

Host pepsin

STH promotes_____ after puberty

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Protein synthesis

Cell differentiation

Metabolism

Cell division

Features of most complex animals are

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Triploblastic with true coelom

Triploblastic with pseudocoelom

Triploblastic with bilateral symmetry

Triploblastic with radial symmetry

The rate of enzyme action will be minimum at

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Optimum pH

Optimum temperature

Optimum conditions

Maximum temperature

RNA and Proteins are components of

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Chromosomes

Receptors

Secretions

Ribosome

The second trophic level includes the:

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Producers

Tertiary consumers

Secondary consumers

Primary consumers

Plant and animals replace the earlier ones in a way of

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Community relay

Succession

Predecessors

All of these

These micro-organisms use the proteins and amino acids and release excess of ammonia (NH₃) or ammonium ions (NH₄). This process is known as

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Ammonification

Nitrification

Assimilation

All of above

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

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Parasitism

Commensalisms

Predation

Symbiosis

If you are studying the structure of HIV , you will observe spikes associated with the

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Core

Capsid

Envelope

Genome

Which of the following helps in recognition of substrate

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Active site

Catalytic site

Binding site

All

In deuterostomes mesoderm is derived from wall of developing

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Coelom

Heart

Archenteron

Blastopore

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

The term niche in ecolgy was first proposed by:

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Charles Eton

Ernst Haeckel

Joseph Grinnell

Carolus Linnaeus

There are ________ total possible genotypes of blood group ABO system

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3

4

6

7

Salt water ocean and sea are the largest ecosystem which cover __________ of earth surfaces.

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70%

71%

80%

65%

This is an association between a host and a parasite

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Predation

Anemies

Parasitism

None of above

A thin layer of earth in which all living organisms live is called:

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Biosphere

Habitat

Niche

Hydrosphere

Provirus is

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Genome of bacteriophage

Genome of HIV uncoiled in Host cell

Genome of HIV incorporated in Host genome

Genome of a host

A symbiotic relationship that benefits one species & neither helps nor harms the other is called

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Mycorrihza

Symbiosis

Commensalism

Mutualism

The pairs of gills present in cyclostomata are

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5-7

10-12

6-14

4-5

Iron, iodine and zinc required by the organisms are said to the:

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Macronutrients

Micronutrients

Moderate nutrients

Assimilation

Lamarck was incharge of invertebrate collection at Natural History Museum is

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Berlin

Paris

California

Brun

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

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Phagocytosis

Pinocytosis

Endocytosis

Exocytosis

According to fluid mosaic model of cell membrane

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The most common type of molecules in the membrane are proteins

Basic membrane structure results from how proteins interact with water

The membrane is highly mobile mixture of phospholipids and proteins

The unique properties of cell types are determined by their phospholipids

A mixture of sand and clay in:

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Silt

Kaolin

Humus

Loam

What will be the risk of heamophilia in sons if father is haemophilic and mother is normal

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0%

20%

25%

50%

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

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Little grazing

Moderate grazing

Over grazing

None grazing

The particles which do not contain any nucleic acid are

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Viruses

Prions

Viroids

All

Excessive ploughing of lands in arid regions results in the development of

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Forest

Deserts

Grassland

Fields

Green house effect, acid rain headaches and coughs are related to which of the followings?

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Oxides of nitrogen

Oxides of sulphur

CO

CFCs

The hormone which is not secreted by anterior lobe of pituitary is

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GH

ICSH

Prolactin

TRF

The competitive inhibitor competes with the

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Enzyme

Cofactor

Substrate

Coenzyme

A change in the community structure of an ecosystem over a period of time is:

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Progression

Sequence

Succession

String

The nutrients in aquatic ecosystem tends to be concentrated near the

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Bottom

Surface

Center of total depth

10 feet below the surface

Decrease in progesterone level in blood stimulates the secretion of

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Estrogen

FSH

Cortisol

Oxytocin

Shallow water zone of the lake near the shore is called:

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Intertidal zone

Littoral zone

profundal zone

Limnetic zone

Mycorrhiza is an association between the roots of plants growing in acid soil and certain

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Virus

Fungi

Bacteria

Nematods

The enzyme that works best at intermediate pH is

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Pepsin

Chymotrypsin

Sucrase

Pancreatic lipase

Which of the following is not an enzyme of HIV

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Reverse transcriptase

Integerase

Protease

Ligase

Both organisms benefit from the ______ relationship

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Mutualism

Commensalism

Parasitism

All of above

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

The actual location of place where an organisms live is called its:

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Ecosystem

Habitat

Niche

Biome

The animal that is caught and eaten is the

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Predator

Prey

Consumer

Both a and c

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

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1%

2%

3%

5%

Which is correct about myelin sheath

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It speeds up conduction

It is found in all axons

It is found in all dendrites

It is proteinaceous only

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

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Activator

Cofactor

Prosthetic group

Apo-enzyme

The gill pouches present in embryos of mammals :

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support that ontogeny recapitulates phylogeny

homologous structures

used by embryos to breathe

evidence for the degeneration

Which one of the following always contains DNA?

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Centriole

Lysosome

Golgi apparatus

Mitochondrion

Grasslands of tropic climate have woody trees and are called:

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Alpine

Boreal

Biome

Savanna

Chemical nature of spikes present on HIV

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Protein

Carbohydrate

Glycolipid

Glycoprotein

The amount of energy left after plants have met their respiratory needs shows up the plant:

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Not productivity

Gross productivity

Secondary productivity

Bio energy

The first comers in an area are termed as

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Consumers

Producers

Pioneers

All of above

Rh factor or antigen was first studied in :

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Man

Owl

Monkey

Fish

All carbon atoms in a monosaccharide ____ have hydroxyl group

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Except one

Except Two

Without Exception

Except last

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

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Nucleoside

Nucleic acid

Nucleotide

Nuclein

Dandruff is caused by

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Algae

Bacteria

Fungi

Virus

Genetic basis of ABO blood group system was explained by:

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Landsteiner

Levine

Bernstein

Carl Correns

The average rainfall in desert ecosystem is:

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20 - 30 cm

20 - 40 cm

25 - 50 cm

14 - 35 cm

The relationship of a single population towards its environment is called

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Ecology

Synecology

Autoecology

All of foregoing

The bond formed between glucose and fructose to form sucrose

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α 1 , 4 Glycosidic bond

β 1 , 4 Glycosidic bond

α 1 , 2 Glycosidic bond

β 1 , 2 Glycosidic bond

Which of the following cross is carried to check the genotype of an individual showing a dominant phenotype

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Check cross

Test Cross

Criss cross

Self cross

Leech is preferably a

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Host

Parasite

Predator

Mutualist

Animals are

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Producers

Consumers

Decomposers

Non of the above

Endangered plant species have been recorded to more than:

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600

400

500

300

Green plants are ______ trophic level

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First

Second

Third

Forth

Succession starting in pond is called

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Hydrosere

Xerosere

Pioneers

None of these

Man depends foams are potential sources of

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Carbon monoxide

Sulphur dioxide

Chlorofluorocarbons (CFCs)

Lead compounds