NSO Level 1- Science Olympiad (SOF) Class 8: Questions 332 - 337 of 1076

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Question number: 332

» Microorganisms

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MCQ▾

Question

The first antibiotic prepared by human is

Choices

Choice (4) Response

a.

Tetracycline

b.

Streptomycin

c.

Erythromycin

d.

Penicillin

Question number: 333

» Microorganisms

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MCQ▾

Question

Yeast produces this gas to rise the dough when added to it.

Choices

Choice (4) Response

a.

Sulphur dioxide

b.

Nitrogen

c.

Oxygen

d.

Carbon dioxide

Question number: 334

» Microorganisms

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MCQ▾

Question

The grey coloured appearance seen on a moist bread slice is

Choices

Choice (4) Response

a.

Yeast

b.

Mould

c.

Protozoa

d.

Bacteria

Question number: 335

» Conservation of Plants and Animals

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MCQ▾

Question

Deforestation increases the level of carbon dioxide in the atmosphere. Correct explanation to this statement is

Choices

Choice (4) Response

a.

Cutting down trees decreases the utilization of carbon dioxide.

b.

Plants utilize carbon dioxide for photosynthesis

c.

A is the explanation of b

d.

None of the above

Question number: 336

» Microorganisms

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MCQ▾

Question

In which of the following food items, Pasteurization is used as a method of preservation?

Choices

Choice (4) Response

a.

Milk

b.

Milk products

c.

Vegetables

d.

Fruits

Question number: 337

» Crop Production and Management

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MCQ▾

Question

Growing leguminous plants helps in improving the nitrogen content in soil

  1. Rhizobium present in the root nodule of leguminous plants fix atmospheric nitrogen.

  2. Nitrogen is essential for plants to grow healthy.

  3. When these nodules decay, the nitrogen is released in to the soil.

Choices

Choice (4) Response

a.

2 and 3

b.

1 and 2

c.

1,2 and 3

d.

None of the above

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