Question # 1

How many hydrogen bounds are formed between adenine and thymine?

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1

2

3

4

E-Coil bacterium was made in.

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1970 AD

1977 AD

1975 AD

1980 AD

Conversion of Nitrates into nitrogen gas is called.

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Denitrification

Assimilation

Ammonification

Nitrogen fixtation

___________ is the longest bone in our body.

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Arm

Leg

Thigh

Foot

The materials flow forms one trophic level to the next by means of:

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food chains

food webs

energy pyramids

both A and B

Smoking may also lead to the cancers in:

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Kidneys and pancreas

Oral cavity and larynx

Breast and bladder

All of them

Which of the following statement regarding genes is FALSE.

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Genes are located on chromosomes

Genes consist of a long sequence of DNA

A gen contains information for the production of a protein

Each cell contain a single copy of every gene.

In ecosystem the role of decomposers is played by

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animals

plants

bacteria and fungi

algae

Example of Endoparasite is:

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Plasmodium

Mosquito

Leech

Lices

Aspirin is categorized as:

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A drug from animals

A synthetic durg

A drug form plants

A drug from minerals

Nose and larnyx are made up of:

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Hyaline Cartillage

Elastic Cartillage

Fibrous Cartillage

Bone

The drugs which is used to reduce the pain are called:

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Analgesics

Antiseptics

Antibiotics

Sedatives

Neurons in which direction of nerve impulses is towards brain cord are called;

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Sensory Neurons

Associative Neurons

Motor Neurons

_{Nerve impuse}

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