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Important Questions

Chemistry

Biomolecules

Biomolecules Important Questions for NEET Chemistry - 2026

Q: 2. Which topics in the biomolecules chapter are frequently asked in NEET exams?

Most NEET important questions come from: Classification of carbohydrates (aldoses vs ketoses) Structures of glucose, fructose, sucrose, lactose, and maltose Levels of protein structure and protein denaturation Functions of vitamins DNA vs RNA composition and function

Q: 4. Are match-the-following and diagram-based questions common in NEET for biomolecules?

Yes, NEET often includes match-the-following and simple diagram-based questions on structures of glucose, amino acids, and nucleic acids. To prepare, practice drawing key diagrams and matching terms with functions or properties. Visual memory can help you answer these questions quickly and accurately during the exam.

Q: 5. What are common mistakes students make while attempting NEET important questions from the biomolecules chapter?

Common pitfalls include confusion between monosaccharides and oligosaccharides, mixing up protein structure levels, and memorizing vitamin functions superficially. To avoid errors: Use flowcharts for classifications Revise structures side-by-side Learn vitamin functions through mnemonics

Q: 7. What strategy works best for mastering chapter-wise practice questions on biomolecules for NEET Chemistry?

Effective strategy includes regular timed practice of chapter-wise NEET questions, focusing on different formats—MCQs, assertion-reason, match-the-following, and diagrams. Analyze mistakes, revisit weak areas, and use summary tables for quick recall. Consistent practice is key for scoring in the biomolecules section.

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Practice Biomolecules Important Questions - Free PDF Download

Prepare for NEET Chemistry with these Important Questions on the chapter Biomolecules by Vedantu. This page covers key topics and questions you may face on NEET. Make sure you understand the concepts well before practicing.

Biomolecules includes a general introduction, the role of carbohydrates, classification of monosaccharides, and examples like glucose and fructose. It also covers proteins, amino acids, types of protein structures, denaturation, and enzymes. Vitamins, their functions, the structure of DNA and RNA, the role of nucleic acids, and a basic idea about hormones are also included.

Practicing with Vedantu’s NEET Important Questions with Answers will help you grasp these important topics. These questions match the NEET exam pattern and clarify your doubts. Download the free PDF to review and practice all key biomolecule questions for your NEET exam preparation.

Practice Biomolecules Important Questions - Free PDF Download

1. Multiple choice questions.

1. Which of the following is a disaccharide?

(a) Glucose
(b) Sucrose
(c) Fructose
(d) Ribose

Answer: (b) Sucrose.

2. The basic structural unit of proteins is:

(a) Nucleotide
(b) Glycerol
(c) Amino acid
(d) Fatty acid

Answer: (c) Amino acid.

3. DNA differs from RNA because DNA contains:

(a) Ribose sugar
(b) Thymine
(c) Uracil
(d) Peptide bond

Answer: (b) Thymine.

4. Which vitamin is water-soluble?

(a) Vitamin A
(b) Vitamin D
(c) Vitamin C
(d) Vitamin E

Answer: (c) Vitamin C.

5. The bond joining two amino acids is called:

(a) Glycosidic bond
(b) Peptide bond
(c) Phosphodiester bond
(d) Hydrogen bond

Answer: (b) Peptide bond.

2. Very Short Answer (VSA).

6. What are biomolecules?

Answer: Biomolecules are organic molecules produced by living organisms, including carbohydrates, proteins, lipids, nucleic acids, vitamins, and hormones.

7. Name the monosaccharide present in both sucrose and maltose.

Answer: Glucose is the monosaccharide found in both sucrose and maltose.

8. Define a peptide bond.

Answer: A peptide bond is a covalent bond formed between the carboxyl group of one amino acid and the amino group of another.

9. Which vitamin helps in blood clotting?

Answer: Vitamin K helps in the process of blood clotting.

10. Name the sugar present in RNA.

Answer: Ribose is the pentose sugar present in RNA molecules.

3. Short Answer Questions.

11. Explain the classification of carbohydrates with examples.

Answer: Carbohydrates are classified into monosaccharides (glucose, fructose), disaccharides (sucrose, lactose), and polysaccharides (starch, cellulose). Monosaccharides are simple sugars, disaccharides consist of two monosaccharides, and polysaccharides are long-chain polymers of monosaccharide units.

12. What is protein denaturation? State its effect.

Answer: Denaturation of proteins occurs when the native structure of a protein is disrupted by heat or chemicals, breaking non-covalent bonds. This causes loss of biological activity but does not change the primary structure of the protein.

13. Describe the biological functions of nucleic acids.

Answer: Nucleic acids (DNA and RNA) store genetic information and control the synthesis of proteins. DNA is responsible for heredity, while RNA translates genetic code for protein synthesis and regulates gene expression.

14. Give a qualitative idea of primary and secondary protein structure.

Answer: The primary structure of a protein is the linear sequence of amino acids linked by peptide bonds. Secondary structure refers to local folding, such as α-helix and β-pleated sheet, stabilized by hydrogen bonds among backbone atoms.

15. Write two differences between DNA and RNA based on their chemical constitution.

Answer: DNA contains deoxyribose sugar and thymine, while RNA has ribose sugar and uracil. DNA is double-stranded and stable, whereas RNA is mostly single-stranded and less stable.

4. True or False Questions.

16. Maltose consists of two glucose units linked by a glycosidic bond.

Answer: True.

17. Proteins are polymers of nucleotides.

Answer: False.

18. Enzymes are biological catalysts made up of proteins.

Answer: True.

19. Sucrose is a reducing sugar.

Answer: False.

20. DNA has a double-helix structure.

Answer: True.

3. Fill in the Blanks Questions.

21. The enzyme that converts glucose to glucose-6-phosphate is ________.

Answer: Hexokinase.

22. The hormone responsible for regulating blood sugar is ________.

Answer: Insulin.

23. ________ is the vitamin necessary for the absorption of calcium and phosphorus.

Answer: Vitamin D.

24. The monosaccharide present in both DNA and RNA is ________.

Answer: Pentose.

25. The primary structure of a protein is determined by the sequence of ________.

Answer: Amino acids.

Why Understanding Biomolecules Is Crucial for NEET Chemistry

Studying biomolecules helps NEET aspirants clarify tough topics like DNA, proteins, and carbohydrates. These questions often appear in the exam. Understanding core facts gives you an edge, making Chemistry both interesting and more confident during your NEET journey.

Biomolecules link structure and function in living organisms. For NEET, knowing carbohydrate classification, amino acids, and nucleic acids builds strong foundational knowledge. This boosts your performance in both conceptual and factual questions in NEET Chemistry exams from every angle.

From vitamins and enzymes to hormones, these concepts frequently feature in NEET Chemistry. Solid revision of these basics with Vedantu can make tricky questions easier and help you score higher, ensuring you’re always ready to solve twists confidently.

FAQs on Biomolecules Important Questions for NEET Chemistry - 2026

1. What are the most important NEET questions on biomolecules and how should students approach them?

Exam-focused questions on biomolecules usually test concepts like carbohydrate classification, structures of proteins, and differences between DNA and RNA. Practice by solving NCERT-based MCQs, focusing on diagrams, definitions, and assertion-reason type questions. Revise functions and examples regularly to avoid confusion between similar terms.

2. Which topics in the biomolecules chapter are frequently asked in NEET exams?

Most NEET important questions come from:

Classification of carbohydrates (aldoses vs ketoses)
Structures of glucose, fructose, sucrose, lactose, and maltose
Levels of protein structure and protein denaturation
Functions of vitamins
DNA vs RNA composition and function

3. How to identify expected assertion-reason and MCQ patterns from the biomolecules chapter?

Assertion-reason and MCQ questions often center on basic differences (like aldoses vs ketoses), sequential processes, or exceptions. Focus on:

Classifications, e.g., types of amino acids
Functional differences, e.g., DNA vs RNA
Unique properties and exceptions

Practice by grouping similar facts and testing yourself with assertion-reason sets.

4. Are match-the-following and diagram-based questions common in NEET for biomolecules?

Yes, NEET often includes match-the-following and simple diagram-based questions on structures of glucose, amino acids, and nucleic acids. To prepare, practice drawing key diagrams and matching terms with functions or properties. Visual memory can help you answer these questions quickly and accurately during the exam.

5. What are common mistakes students make while attempting NEET important questions from the biomolecules chapter?

Common pitfalls include confusion between monosaccharides and oligosaccharides, mixing up protein structure levels, and memorizing vitamin functions superficially. To avoid errors:

Use flowcharts for classifications
Revise structures side-by-side
Learn vitamin functions through mnemonics

6. How can students quickly revise key definitions and concepts for biomolecules before the NEET exam?

For last-minute revision of important questions:

Prepare a one-page summary for each subtopic: carbohydrates, proteins, vitamins, nucleic acids, hormones
Focus on structural formulas and functional highlights
Practice NEET-style MCQs from past years

7. What strategy works best for mastering chapter-wise practice questions on biomolecules for NEET Chemistry?

Effective strategy includes regular timed practice of chapter-wise NEET questions, focusing on different formats—MCQs, assertion-reason, match-the-following, and diagrams. Analyze mistakes, revisit weak areas, and use summary tables for quick recall. Consistent practice is key for scoring in the biomolecules section.