Biomolecules Practice Questions

Class 12 · Chemistry · 3092 free MCQs with instant results and detailed explanations.

3092

Total

933

Easy

1535

Medium

624

Hard

Start Practicing Biomolecules

Take a timed quiz or customize your practice session

Quick Quiz (10 Qs) → Mock Test (25 Qs) ⚙ Customize

Topics in Biomolecules

Proteins 641

Vitamins 625

Enzymes 613

Carbohydrates 618

Nucleic Acids 595

Sample Questions from Biomolecules

Here are 10 sample questions. Start a quiz to get randomized questions with scoring.

Easy

Which of the following is a monosaccharide?

A. Glucose

B. Sucrose

C. Lactose

D. Maltose

Show Answer & Explanation

Correct Answer: A

Glucose is a simple sugar and is classified as a monosaccharide, while the others are disaccharides.

Easy

What is the common name for C6H12O6?

A. Fructose

B. Glucose

C. Galactose

D. Mannose

Show Answer & Explanation

Correct Answer: B

C6H12O6 represents glucose, a primary sugar used by cells for energy.

Easy

Which carbohydrate is known as table sugar?

A. Fructose

B. Glucose

C. Sucrose

D. Galactose

Show Answer & Explanation

Correct Answer: C

Sucrose is commonly known as table sugar and is a disaccharide composed of glucose and fructose.

Medium

Which of the following is the primary function of carbohydrates in living organisms?

A. Energy storage

B. Genetic information

C. Catalysis

D. Structural support

Show Answer & Explanation

Correct Answer: A

Carbohydrates primarily serve as a source of energy for living organisms.

Medium

Which of the following monosaccharides is a component of sucrose?

A. Glucose

B. Galactose

C. Fructose

D. Ribose

Show Answer & Explanation

Correct Answer: C

Sucrose is composed of glucose and fructose; thus, fructose is one of its components.

Medium

Which carbohydrate is known as 'blood sugar'?

A. Galactose

B. Fructose

C. Glucose

D. Sucrose

Show Answer & Explanation

Correct Answer: C

Glucose is commonly referred to as blood sugar as it circulates in the bloodstream.

Medium

Which of the following polysaccharides is commonly used for energy storage in plants?

A. Glycogen

B. Starch

C. Cellulose

D. Chitin

Show Answer & Explanation

Correct Answer: B

Starch is the primary energy storage polysaccharide in plants.

Hard

Which of the following carbohydrates is a non-reducing sugar?

A. Sucrose

B. Glucose

C. Fructose

D. Lactose

Show Answer & Explanation

Correct Answer: A

Sucrose is a non-reducing sugar because it does not have a free aldehyde or ketone group capable of reducing other compounds.

Hard

What is the primary function of carbohydrates in living organisms?

A. Storage of genetic information

B. Energy supply

C. Catalysis of biochemical reactions

D. Transport of oxygen

Show Answer & Explanation

Correct Answer: B

Carbohydrates primarily serve as an immediate source of energy for cells.

Q10

Hard

Which of the following statements about cellulose is FALSE?

A. Cellulose is a linear polymer.

B. Cellulose is composed of α-glucose units.

C. Cellulose provides structural support in plant cells.

D. Cellulose is insoluble in water.

Show Answer & Explanation

Correct Answer: B

Cellulose is composed of β-glucose units, not α-glucose units.

Showing 10 of 3092 questions. Start a quiz to practice all questions with scoring and timer.

Practice All 3092 Questions →

More Chemistry Chapters

2219 Qs →

1874 Qs →

2264 Qs →

2282 Qs →

2454 Qs →

6 General Principles of Isolation of Elements

2721 Qs →

7 The p-Block Elements

2986 Qs →

8 The d and f Block Elements

2760 Qs →

Other Class 12 Subjects

🧬 Biology → 📐 Mathematics → ⚡ Physics →

Biomolecules — Class 12 Chemistry Practice Questions Online

This page contains 3092 practice MCQs for the chapter Biomolecules in Class 12 Chemistry. The questions are organized by difficulty — 933 easy, 1535 medium, 624 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.