NSO Level 1- Science Olympiad (SOF) Class 12: Questions 33 - 36 of 60

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Question number: 33

» Biology » Biology in Human Welfare

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MCQ▾

Question

How many times is the Urine produced by the human kidney concentrated than the initial filtrate formed?

Choices

Choice (4) Response

a.

1200

b.

4

c.

20

d.

2

Question number: 34

» Biology » Biotechnology

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MCQ▾

Question

What is the most challenging issue that genome sequencing is facing?

Choices

Choice (4) Response

a.

Inability to develop fast and accurate sequencing techniques

b.

The ethics of using information from genomes at individual level

c.

DNA availability and stability

d.

All of the above

Question number: 35

» Biology » Genetics and Evolution

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Question

Crime investigators found a small sample of blood at the crime site. Only a small amount of DNA could be extracted from the place and there is requirement of more DNA. How can they amplify this small quantity?

Choices

Choice (4) Response

a.

Subjecting the DNA sample to polymerase chain reaction.

b.

Subjecting the DNA sample to electrophoresis

c.

By using a molecular probe

d.

By treating DNA sample with restriction enzymes

Question number: 36

» Biology » Ecology

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MCQ▾

Question

From the statements given below select those which are incorrect for acid rain.

  1. Sulphur and nitrogen oxides are released from industries, exhausts, power plants, etc.

  2. Rainfall and other precipitation forms with a pH of less than 5 refer to acid rain.

  3. Nitrogen and sulphur oxides undergo reaction with water in air and form nitric acid and sulphuric acid.

  4. There are harmful effects on human beings and animals by acid rain but no effect by plants.

Choices

Choice (4) Response

a.

2 and 4

b.

1 and 3

c.

4 only

d.

2 only

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