Biology 9th Chap 2 : Topic 8 - Maryam Publications

Biology Chapter 2 : Topic 8

Function of DNA

1 / 15

The primary function of DNA in living organisms is to:

A) Carry hereditary information

B) Form cell membranes

C) Digest food particles

D) Store energy for cellular activities

2 / 15

Why is DNA called the hereditary material?

A) It stores fats.

B) It forms enzymes.

C) It provides immediate energy.

D) It passes genetic traits from parents to offspring.

3 / 15

Which characteristic is most directly controlled by information stored in DNA?

A) Inherited traits such as eye color

B) Amount of rainfall

C) Body temperature of the environment

D) Type of soil

4 / 15

A child resembles both parents because:

A) Children automatically copy parental behavior.

B) Parents transfer proteins directly to offspring.

C) Parents provide equal amounts of carbohydrates.

D) DNA carrying hereditary information is inherited from both parents.

5 / 15

Which statement best explains the role of DNA in heredity?

A) DNA stores and transmits biological information.

B) DNA produces energy directly.

C) DNA forms cell walls.

D) DNA acts as a nutrient reserve.

6 / 15

A mutation in DNA is most likely to affect:

A) Atmospheric pressure

B) Water absorption only

C) Inherited characteristics

D) Mineral content of soil

7 / 15

Which cellular component contains the instructions for making proteins?

A) Carbohydrates

B) Lipids

C) Water

D) DNA

8 / 15

The transmission of hereditary information from parents to offspring depends mainly on:

A) Lipids

B) Vitamins

C) DNA

D) Minerals

9 / 15

If DNA could no longer store hereditary information, which process would be most affected?

A) Inheritance of traits

B) Digestion of food

C) Absorption of water

D) Blood circulation

10 / 15

Which example best demonstrates DNA acting as a carrier of hereditary information?

A) A child inheriting blood group from parents

B) A plant absorbing water through roots

C) A bird building a nest

D) A leaf performing photosynthesis

11 / 15

DNA is important because it contains:

A) Instructions for the structure and function of an organism

B) Stored fats for energy

C) Mineral reserves

D) Oxygen for respiration

12 / 15

Which statement supports the role of DNA as hereditary material?

A) DNA is found in chromosomes.

B) DNA forms cell membranes.

C) DNA dissolves in water.

D) DNA stores fats.

13 / 15

Two siblings have different appearances because:

A) Their DNA contains different combinations of inherited information.

B) Their bodies contain different amounts of water only.

C) Their cells contain different minerals.

D) They have different numbers of organs.

14 / 15

A scientist studying how traits are passed from one generation to the next would mainly study:

A) Carbohydrates

B) Lipids

C) DNA

D) Vitamins

15 / 15

Which conclusion can be drawn if a trait consistently appears in successive generations of a family?

A) The trait is caused by carbohydrates.

B) The trait is unrelated to genetics.

C) The trait is controlled by hereditary information carried in DNA.

D) The trait is stored in lipids.

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