Question # 1

Glyosidic bond is formed by the

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Removal of Oxygen

Addition of Water

Addition of Oxygen

Removal of Water

Most of the vectors for spreading important human diseases belong to:

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Radiata

Acoelomates

Pseudocoelomates

Coelomates

These are the receptors which respond to the mechanical condition of internal organs

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Nocireceptors

Receptors of skin

Receptors of stomach wall

Receptors of eye

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

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Intertidal zone

Littoral zone

profundal zone

Limnetic zone

A heterrozygote offspring quantitatively exceeds the phenotypic expression of both the homozygote parents due to:

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dominance

incomplete dominance

over dominance

codominance

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

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%

Due to the trampling of the soil layer by the hooves of grazing animals the rain water will:

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Penetrate deep into the soil

Not penetrate this soil

Stop on the soil

Do not affect this layer of the soil

An animal which captures and readily kills living animals for its food is known as

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Parasite

Predator

Scavenger

Consumer

The basic role of an organism in the community is called

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Niche

Factor

Ability

None of above

In earthworm, the surface responsible for the gaseous exchange is

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Skin

Gills

Body surface

Trachea

DNA of non-virulent phage is

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Provirus

Prophage

Both

None

Abiotic factors include:

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Geomagnetism

Gravity

Water

All these

Darwin proposed a mechanism for evolution, which he termed

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Natural selection

Special reaction

Adaptation

Descent with modification

In limnetic zone the phytoplankton are:

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Cyanobacteria

Protozoan

Fungi

Bacteria

Phosphorylation of glucose molecule in glycolysis is carried out by

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ATPase

Kinase

Isomerase

Transferase

Substances cross the cell membrane more easily when they are

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water soluble

protein soluble

alcohol soluble

lipid soluble

The particles which do not contain any nucleic acid are

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Viruses

Prions

Viroids

All

Which of the following cannot cross the phospholipid bilayer easily

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Ions

Gas molecules

Ethanol

Steroids

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 only phylum included in Grade Radiata is:

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Porifera

Aschelminthes

Platyhelminthes

Cnidaria

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

Which of these diseases is not infectious?

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Measles

Influenza

Pneumonia

Tetany

Green photosynthetic plants are

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Producers

Consumers

Decomposers

None of the above

Omnivores are described by how many trophic levels

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Any 2

Any 3

Any 1

Primary & any higher

The symbiotic relationship in which both the partners get benefit is:

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Parasitism

Commensalism

Predation

Mutualism

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

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Little grazing

Moderate grazing

Over grazing

None grazing

Which of the following is a common feature of all viruses

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DNA replication in cytoplasm

RNA synthesis in nucleus

Protein synthesis in cytoplasm

Reverse transcription in cytoplasm

On poles, the average temperature is

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Zero°C

5°C

Below freezing point

None

It is not a germ layer

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Ectoderm

Endoderm

Blastoderm

Mesoderm

The inhibitor having structural similarity with substrate is

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Irreversible inhibitor

Reversible inhibitor

Competitive inhibitor

Noncompetitive inhibitor

A Crista is made of -------- membrane

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Lipoprotein

Glycoprotein

Nucleoprotein

Phospholipids

The best known phages are T phages that infect

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Pseudomonas

Mycoplasma

Escherichia Coli

Salmonella

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

It is an animal, but it does not have nerve or muscle tissue. It is neither diploblastic nor triploblastic. It is probably a

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Flatworm

Nematode

Cnidarian

Sponge

The larva formed during the life cycle of Annelida is

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Glochidium larva

Bipinnaria larva

Trochophore larva

Tornaria larva

Leech is preferably a

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Host

Parasite

Predator

Mutualist

A community is

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A collection of plants and animals

Autotrophs and heterotrops

Population of different species living together in the same area

Food chain

In temperature deciduous forest the average rainfall is:

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650 -1500 mm

750 -1500 mm

800 - 1600 mm

700 - 1500 mm

The amount of energy left after plants have met their respiratory needs is net primary production, which shows up as plant:

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Respiration

Photosynthesis

Biomass

Reserve

Nucleotide is to ___ as amino acid is to ___

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Nucleic acids, Lipids

Nucleic acids, Proteins

Proteins, Lipids

Lipids, proteins

______form the raw material for coenzyme

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Nucleic acid

Lipids

Vitamins

Proteins

Both ____ and ____ are detachable cofactors

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Apoenzyme, holoenzyme

Activator, coenzyme

Coenzyme, prosthetic group

Prosthetic group, activator

Tritanopia is blindness of

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Red Colour

Green Colour

Blue Colour

Pink Colour

A group of ribosomes attached with same mRNA form polysome for

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Better expression of Gene

Rapid production of protein

Increased production of protein

Protein export

Which of the following acts as template strand for reverse transcription

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Viral DNA

Viral RNA

Host DNA

Host RNA

The neuron which has central and peripheral branches is

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Sensory neuron

Motor neuron

Associative neuron

Relay neuron

Genetic basis of ABO blood group system was explained by:

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Landsteiner

Levine

Bernstein

Carl Correns

Primary succession that starts on a dry soil or rock is called:

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Hydrosere

Derosere

Xerosere

Aquasere

It lacks a true dendron

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Sensory neuron

Motor neuron

Associative neuron

Relay neuron

Nutrient cycle are also called us:

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Biogeochemical cycles

Elemental cycles

Geochemical cycles

Biochemical cycles

This is an association between a host and a parasite

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Predation

Anemies

Parasitism

None of above

The correct sequence in a food chain is

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Mice - green plants - snake - hawke

Green plants - mice - snake - hawk

Mice - snake - green plants - hawk

Green plants - hawk - snake - mice

Genome of the acellular particle mainly comprised of

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Protein

Sugars

Lipid

Nucleic acid

In deoxyribose, oxygen is removed from carbon number

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1

2

3

4

Succession starting in pond is called

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Hydrosere

Xerosere

Pioneers

None of these

The prokaryotes may have arisen more than

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420 million years ago

42 billion years ago

3.5 billion years ago

1.5 billion years ago

Primary consumers form ______ trophic level

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First

Second

Third

Forth

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

A common animal of temperate deciduous forests is the:

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Kangaroo

Cat

Leopard

Rhesus Monkey

An organelle having no nucleic acid in its chemical composition is

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Lysosomes

Ribosomes

Centriole

Mitochondria

The establishment of stable vegetation on an area is termed as

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Plant succession

Animal succession

Succession

All of the above

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

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

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Virus

Fungi

Bacteria

Nematods

Mutatuons are inherited only if they occur in the

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Gland cells

Gametes

Muscle cells

Somatic cells

Lichen is the example of

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Mutualism

Commenaslim

Parasitism

All of above

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

Fresh water ecosystem covers less than ______% of the hydrospheric ecosystems

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2

3

1

4

It brings about an increase in blood glucose level mainly by its production from glycogen

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Insulin

Glucagon

Cortisol

Aldosterone

Following enzymes are indicating the specificity of their action in their names, except

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Sucrase

Amylase

Pepsin

Lipase

Enzymes cannot work in which of the following

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Aqueous medium

Dry medium

Acidic medium

Alkaline medium

Which region of the nucleolus has DNA?

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Central fibrillar region

Central granular region

Peripheral granular region

Peripheral fibrillar region

Synaptic vesicles are present in synaptic knob that is part of

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Post synaptic neuron

Pre synaptic neuron

Both neurons

Second neuron

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

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Community

Population

Consumers

All of these

All the organisms, primarily animals, which obtain energy directly or indirectly from the produces as ready-organic food are:

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Decomposers

Consumers

Detritivores

Scavengers

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

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

About ______% of solar energy is used to evaporate water, heat up soil and then lost to the outer space

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95

97

98

99

--------------- and --------------- have same number of chromosome

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Man, Chimpanzee

Chimpanzee, Potato

Man, Potato

Potato, Tomato

Loins are

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Primary consumers

Secondary consumers

Tertiary consumer

All of above