Question # 1

The term enzyme was coined from a Greek word which means

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In yeast

In grapes

In apple

In bacteria

An organism of the lineage of animals in which the blastopore of the developing embryo becomes the anus, while a second opening becomes the mouth called:

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Triploblastic

Protostome

Diploblastic

Deuterostome

Which one of the following does not refer to mutialism

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Mycorrhiza

Parasitism

Lichen

Bacteria in the gut of cow

Tiny shaped structure located deep between cerebral hemispheres

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Thyroid gland

Pitutary gland

Pineal Gland

Corpus callosum

Animals involved in the construction of corals are

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Polyps

Medusae

Gonozooids

None

Lichen is the example of

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Mutualism

Commenaslim

Parasitism

All of above

Forest ecosystem is subdivided into ____ type of forests.

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Two

Four

Five

Three

Most of the plant cells lack following organelles EXCEPT

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Flagellum

Lysosome

Centriole

Mitochondria

___ gives blue color with iodine

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Glycogen

Dextrin

Cellulose

Starches

A carrier mother for colour blindness does not have

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A normal boy

A carrier boy

A colour blind boy

A normal daughter

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

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Mycorrihza

Symbiosis

Commensalism

Mutualism

The amount of DNA in _____ is one half to that of_____:

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Somatic cells, Germ cells

Osteocytes, Somatic cells

Germ cells, Somatic cells

Somatic cells, Gametocytes

The idea of inheritance of acquired characteristics was presented by

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Margulis

Lamarck

Linnaeus

Cuvier

Radial symmetry is present in

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Adults of annelida

Adults of echinodermata

Adults of Cnidaria

Both B and C

Pick a non-reducing sugar

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Lactose

Sucrose

Glucose

Fructose

The combination of many food chains is termed as

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Food chain

Food web

Trophic level

None of above

When succession starts on dry soil or rocks it is called:

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Hydrosere

Derosere

Xerosere

lithosere

Man has ____________ linkage group

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23

21

25

46

The study of different communities to environment is called

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Autecology

Synecology

Microbiology

Ornithology

The idea of endosymbiont hypothesis was first proposed by:

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Lynn marguils

Wallace

Karlene Schwartz

Lamarck

Chlorofluorocarbons are

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Organic

Inorganic

Intermediate

Solid

Fungi and bacteria are:

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Producers

Consumers

Decomposers

Predators

In a phospholipid molecule, fatty acid is attached to the carbon number_____ of glycerol.

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1

2

Both

3

Leech is preferably a

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Host

Parasite

Predator

Mutualist

The smallest known virus is

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HIV virus

HBV virus

Influenza virus

Polio virus

Man is

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Primary consumers

Secondary consumers

Tertiary consumers

All of above

Which include seral stages of a primary succession are

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Lichen & algae

Mosses and ferns

Grasses & shrubs

All of these

In tertiary structure, presence of hydrophilic amino acids at the surface of proteins and hydrophobic amino acids buried inside, indicate

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Nature of bonding

Function of protein

Nature of medium

Shape of protein

Slight change in pH can cause

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Denaturation

Crystallization

Ionization

All

All living organisms supported by biosphere are called

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Biotic components

Abiotic components

Autecology

Synecology

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

Choose the correct option about the following figure:

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A is showing Envelope

B is not showing envelope

C is showing RT

D is showing RNA

Major cells infected by HIV are

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Monocytes

B lymphocytes

T lymphocytes

RBC

Ozone is present at about ________ km above earth

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5 -10

10 - 20

10 - 40

10 - 50

The nutrient cycles are also called as

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Biogeochemical cycles

Biochemical cycles

Geo-cycles

All of above

Which of the following is not true about biotic components

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Producers

Consumers

Decomposers

Atmosphere

Diabetes insipidus is caused by

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Lack of aldosterone

Overproduction of ADH

Lack of ADH

Lack of insulin

______ is a group of interbreeding individuals occurring together in space and time

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Population

Species

Community

All of above

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

Part of brain that is involved in learning

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Cerebrum

Thalamus

Cerebellum

Pons

In free state Glucose is present in:

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Grapes

Dates

Figs

All Fruits

Primary consumers form ______ trophic level

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First

Second

Third

Forth

Which of the following virus is DNA enveloped

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Polio virus

Hepatitis B virus

HIV

Measles virus

Sharp rise in LH output due to estrogens is an example of

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Negative feedback

Positive feedback

Primary feedback

None

Plants growing on dry habitat is called:

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Hydrophytes

Mesophytes

Xerophytes

None of these above

Xerosere starts with __________ stage.

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Crustose lichen

Foliose lichen

Mass

Shrub

Which enzyme deficiency leads to phenylketonuria

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Phenylalanine oxidase

Phenylalanine hydroxylase

Phenylalanine synthase

Phenylalanine carboxylase

Endocytosis of an apoptotic body is termed as

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Pinocytosis

Exocytosis

Phagocytosis

Apoptosis

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

In this type of relationship only one organism benefits from the relationship. The other is not affected at all

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Mutualism

Commensalism

Parasitism

All of above

Annual rainfall in grassland is about:

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250 to 650 mm

250 to 850 mm

250 to 450 mm

250 to 750 mm

Which one of the following always contains DNA?

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Centriole

Lysosome

Golgi apparatus

Mitochondrion

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

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Forest

Deserts

Grassland

Fields

Plants growing in xeric (dry) condition are called:

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Hydrophytes

Xerophytes

Mesophytes

Derophytes

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

In earthworm, the surface responsible for the gaseous exchange is

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Skin

Gills

Body surface

Trachea

Pick up ester bond present in nucleotide

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P-O-C

C-O-C

N-O-C

S-O-C

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

Grazers feed mainly on which kind of plants

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Tree leaves

Shrubs

Grasses

Cereals

Circulatory system is open type in all of the following, EXCEPT

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Arthropoda

Bivalvia

Gastropoda

Cephalopoda

Animals are

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Producers

Consumers

Decomposers

Non of the above

Which of the following kind of inhibitors don’t compete for active site of enzyme

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Irreversible competitive

Reversible competitive

Reversible non competitive

Both b and c

An animal that preys other animals is a

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Predator

Carnivore

Consumer

All

Virus without envelope is

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HIV

Hepatitis B

Polio virus

Hepatatis C

Coniferous forests located at high latitude are called

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Boreal

Taiga

Tundra

Alpine

By adding _______in neutral pH, we get the optimum pH of pancreatic lipase

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1

2

3

4

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

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Decomposers

Algae

Producers

None o these

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

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

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Intergranum

Crista

Granum

F_{_1}particle

A Cell interacts with its external environment through

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Cell Wall

Nuclear membrane

Plasma membrane

Cytoplasm

Allele for whiteness in Drosophila is :

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Recessive

Codominant

Dominant

Partially Dominant

Which of the following hypothesis involved the evolution of eukaryotic cell from a prokaryotic cell

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Endosymbiont hypothesis

Membrane invagination hypothesis

Vent hypothesis

Both A and B

Genetic basis of ABO blood group system was explained by:

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Landsteiner

Levine

Bernstein

Carl Correns

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

High calcium concentration in blood causes the stimulation of

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Parathormone

Calcitonin

T₃

T₄

Nitrogen makes up ______ percent of the gases in atmosphere

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76

77

78

98

Causative agent of mysterious brain infection is composed of

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DNA+Protein

RNA+Protein

RNA only

Protein only

DNA of non-virulent phage is

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Provirus

Prophage

Both

None

Herpes type-1 virus causes

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Pitted scars

Swollen neck

Rashes on genitals

Vascular lesions

Lipids store double amount of energy as compared to same amount of carbohydrates, because of

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Higher proportion of C-H bonds

Higher proportion of C-N bonds

Higher proportion of C-O bonds

Lower proportion of C-O-P bonds

Which can't increase their weight in inorganic medium

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Producer

Consumer

Decomposer

Both b & c