Biology 9th Chap 2 : Topic 4 - Maryam Publications

Biology Chapter 2 : Topic 4

Structure and Functions of Lipids

1 / 15

Lipids are mainly composed of:

A) Amino acids only

B) Fatty acids and glycerol

C) Nucleotides

D) Glucose and fructose

2 / 15

Which property best distinguishes lipids from carbohydrates?

A) Lipids contain hydrogen.

B) Lipids are found in cells.

C) Lipids contain carbon.

D) Lipids are insoluble in water.

3 / 15

Which biomolecule serves as the body's major long-term energy reserve?

A) DNA

B) Lipid

C) RNA

D) Protein

4 / 15

A hibernating animal survives for months mainly by utilizing stored:

A) Vitamins

B) DNA

C) Lipids

D) RNA

5 / 15

Which cell structure contains a large amount of lipids?

A) Ribosome

B) Cell membrane

C) Nucleolus

D) Chromosome

6 / 15

Which function of lipids helps maintain body temperature in cold weather?

A) Enzyme formation

B) Genetic storage

C) Insulation beneath the skin

D) Protein synthesis

7 / 15

Which of the following is the richest source of lipids?

A) Fish muscle

B) Rice

C) Butter

D) Beans

8 / 15

A student consumes a diet rich in oils and butter. Which biomolecule is being consumed in the greatest amount?

A) Lipids

B) Proteins

C) Nucleic acids

D) Carbohydrates

9 / 15

Which pair is correctly matched?

A) Lipids — Long-term energy storage

B) Lipids — Genetic information storage

C) Lipids — Protein synthesis

D) Lipids — Immediate source of energy

10 / 15

Which statement about lipids is correct?

A) They are polymers of amino acids.

B) They are major components of cell membranes.

C) They are made of nucleotides.

D) They carry hereditary information.

11 / 15

Why do living organisms store excess energy as lipids instead of carbohydrates?

A) Lipids contain DNA.

B) Lipids dissolve easily in water.

C) Lipids are used for protein synthesis.

D) Lipids contain more stored energy per unit mass.

12 / 15

Which food is primarily a plant source of lipids?

A) Egg

B) Fish

C) Sunflower oil

D) Milk

13 / 15

A person lacking sufficient body fat may have difficulty with:

A) Storing hereditary information

B) Maintaining body insulation

C) Forming chromosomes

D) Producing RNA

14 / 15

Which of the following is NOT a function of lipids?

A) Energy storage

B) Insulation

C) Formation of cell membranes

D) Transmission of genetic information

15 / 15

The basic structural units of most lipids are:

A) Amino acids and nitrogen bases

B) Glucose and amino acids

C) Nucleotides and phosphates

D) Fatty acids and glycerol

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