NSO Level 1- Science Olympiad (SOF) Class 12: Questions 48 - 52 of 60

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Question number: 48

» Biology » Ecology

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MCQ▾

Question

Which of the following substance is obtained from plant roots and is used as coffee substitute and additive?

Choices

Choice (4) Response

a.

Milk powder

b.

Cardamom powder

c.

Chicory powder

d.

Cinnamon powder

Question number: 49

» Biology » Genetics and Evolution

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Matching-Pair▾

Question

Find matching pair:

Choices

Choice (4) Response

a.

Humans

Primate, family

b.

Cuttlefish

Musca, class

c.

Housefly

Mollusca, order

d.

Tiger

Tigris, species

Question number: 50

» Biology » Ecology

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MCQ▾

Question

If red light is subjected continuously to a plant then what will be its effect on phytochrome?

Choices

Choice (4) Response

a.

Phytochrome synthesis will increase

b.

Level of phytochrome will decrease

c.

Phytochrome will be destroyed

d.

Both a. and b. are correct

Question number: 51

» Biology » Genetics and Evolution

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MCQ▾

Question

There are two opposite views about modern man’s origin. According to one view Homo erectus in Aisa were ancestors of modern man. However research of DNA variation suggests African origin of modern man. DNA variation of what kind could suggest this?

Choices

Choice (4) Response

a.

Greater variation in Asia than in Africa

b.

Only variation in Asia and no variation in Africa

c.

Similar variation in Africa and Asia

d.

Greater variation in Africa than in Asia

Question number: 52

» Biology » Genetics and Evolution

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True-False▾

Statements

  1. A/T = C/G

  2. There are two phosphate groups, two bases and two deoxyribose sugar molecules.

  3. A + T = G + C

  4. After separation two strands of a double helix are identical.

  5. In aqueous cytoplasm stability to the double helical DNA is provided by hydrogen bonding.

  6. In aqueous cytoplasm stability to the double helical DNA is provided by hydrophobic bonding.

Choices

Choice (4) Response

a.

Statement Ⅱ, Ⅲ, Ⅳ & Ⅴ are all true. & Ⅵ are all true.

b.

Statement Ⅰ, Ⅲ & Ⅴ are all true.

c.

Statement Ⅰ, Ⅱ, Ⅴ & Ⅵ are all true.

d.

All the statements are correct.

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