NSO Level 1- Science Olympiad (SOF) Class 12: Questions 36 - 38 of 106

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Question 36

Question

MCQ▾

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

Question 37

Question

MCQ▾

There is a table given below which shows the difference between Gene cloning and PCR, which is an incorrect difference from those given?

Choices

Choice (4)Response

a.

The Difference between Gene Cloning and PCR
ParameterPCRGene cloning
Error probabilityLessMore

b.

The Difference between Gene Cloning and PCR
ParameterPCRGene cloning
Time for an experiment2 - 4 days4 hours

c.

The Difference between Gene Cloning and PCR
ParameterPCRGene cloning
CostMoreLess

d.

Both b. and c. are correct

Question 38

Question

MCQ▾

Which of the following plant hormone is responsible for increase in transcription of protease and amylase and are present in aleurone layer of barley?

Choices

Choice (4)Response

a.

Auxin

b.

Cytokinin

c.

Gibberellin

d.

Ethylene

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