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) Form cell membranes

B) Digest food particles

C) Carry hereditary information

D) Store energy for cellular activities

2 / 15

Why is DNA called the hereditary material?

A) It provides immediate energy.

B) It passes genetic traits from parents to offspring.

C) It stores fats.

D) It forms enzymes.

3 / 15

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

A) Body temperature of the environment

B) Type of soil

C) Amount of rainfall

D) Inherited traits such as eye color

4 / 15

A child resembles both parents because:

A) Children automatically copy parental behavior.

B) Parents transfer proteins directly to offspring.

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

D) Parents provide equal amounts of carbohydrates.

5 / 15

Which statement best explains the role of DNA in heredity?

A) DNA acts as a nutrient reserve.

B) DNA stores and transmits biological information.

C) DNA forms cell walls.

D) DNA produces energy directly.

6 / 15

A mutation in DNA is most likely to affect:

A) Inherited characteristics

B) Mineral content of soil

C) Atmospheric pressure

D) Water absorption only

7 / 15

Which cellular component contains the instructions for making proteins?

A) Lipids

B) DNA

C) Water

D) Carbohydrates

8 / 15

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

A) DNA

B) Lipids

C) Vitamins

D) Minerals

9 / 15

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

A) Digestion of food

B) Inheritance of traits

C) Blood circulation

D) Absorption of water

10 / 15

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

A) A plant absorbing water through roots

B) A leaf performing photosynthesis

C) A bird building a nest

D) A child inheriting blood group from parents

11 / 15

DNA is important because it contains:

A) Oxygen for respiration

B) Mineral reserves

C) Stored fats for energy

D) Instructions for the structure and function of an organism

12 / 15

Which statement supports the role of DNA as hereditary material?

A) DNA stores fats.

B) DNA dissolves in water.

C) DNA forms cell membranes.

D) DNA is found in chromosomes.

13 / 15

Two siblings have different appearances because:

A) Their bodies contain different amounts of water only.

B) Their cells contain different minerals.

C) Their DNA contains different combinations of inherited information.

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) Vitamins

B) Lipids

C) DNA

D) Carbohydrates

15 / 15

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

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

B) The trait is caused by carbohydrates.

C) The trait is unrelated to genetics.

D) The trait is stored in lipids.

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