NCERT Class 12 Chemistry Chapter 10: Biomolecules MCQs & PYQs

Chapter 10 of NCERT Class 12 Chemistry delves into the fascinating world of biomolecules—organic molecules essential for life, including carbohydrates, proteins, lipids, nucleic acids, and enzymes. Understanding these molecules is vital for comprehending biological processes like metabolism, genetic information transmission, and the functioning of living organisms. This chapter also covers the structure, classification, and functions of different types of biomolecules.

This article provides Class 12 Chemistry Chapter 10 resources, such as multiple-choice questions (MCQs), previous year questions (PYQs), and downloadable PDFs of Class 12 Chemistry Chapter 10 MCQs and previous year questions.

NCERT Class 12 Chemistry Chapters
Chapter 1: Solutions	Chapter 2: Electrochemistry
Chapter 3: Chemical Kinetics	Chapter 4: The d- and f-Block Elements
Chapter 5: Coordination Compounds	Chapter 6: Haloalkanes and Haloarenes
Chapter 7: Alcohols, Phenols and Ethers	Chapter 8: Aldehydes, Ketones and Carboxylic Acids
Chapter 9: Amines

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Class 12 Chemistry Chapter 10 MCQs

This section includes multiple-choice questions (MCQs) from previous years and expert-curated questions designed for Class 12 Chemistry Chapter 10: Biomolecules. Below are 5 sample questions, with a link to download the full set of MCQs in PDF format.

1.	The glycosidic linkage involved in linking the glucose units in amylase part of starch is: (a) C₁ – C₆ α linkage (b) C₁ – C₆ β linkage (c) C₁ – C₄ α linkage (d) C₁– C₄ β linkage
2.	When D-glucose reacts with HI, it forms (a) Gluconic acid (b) n-hexane (c) Saccharic acid (d) Iodohexane
3.	On hydrolysis, which of the following carbohydrates gives only glucose? (a) Starch (b) Fructose (c) Lactose (d) Sucrose
4.	In the ring structure of glucose, the anomeric carbon is : (a) C-2 (b) C-3 (c) C-4 (d) C-1
5.	Which of the following structures represents -D-glucose ? (a) (b) (c) (d)

Class 12 Chemistry Chapter 10 Subjective Questions Without Solutions

Here are 5 sample subjective questions based on previous years' CBSE exams (2 marks and above) for Class 12 Chemistry Chapter 10: Biomolecules. For the full set of subjective questions, download the PDF.

1.	(a) Write chemical reaction to show that open structure of D-glucose contains the straight chain. (b) What type of linkage is responsible for the formation of protein? (CBSE 2023, 2M)
2.	(i) How are carbohydrates stored in animal body? Mention any one organ where they are present. (ii) What is the basic structural difference between starch and cellulose? (CBSE 2023, 2M)
3.	Give the reaction of heating glucose with hydroxylamine. Presence of which group is confirmed by this reaction? (CBSE 2023, 2M)
4.	Define the following terms : (i) Oligosaccharides (ii) Invert sugar (CBSE 2022, 2M)
5.	Write the reactions showing the presence of following in the open structure of glucose: (i) a carbonyl group (ii) Straight chain with six carbon atoms (CBSE 2020, 2M)

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Science Subjects Table

Sub Topics of Chapter 10: Biomolecules

Chapter Name	Sub Topics of Chapter 10: Biomolecules
Biomolecules	10.1 Introduction to Biomolecules
	10.2 Carbohydrates: Structure, Classification, and Function
	10.3 Proteins: Structure, Classification, and Function
	10.4 Lipids: Structure, Classification, and Function
	10.5 Nucleic Acids: Structure and Function
	10.6 Enzymes: Structure and Mechanism of Action

Review of NCERT Class 12 Chemistry Chapter 10

Biomolecules (Chapter 10) introduces students to the diverse and vital class of organic molecules that make up living organisms. These molecules are fundamental to life processes such as metabolism, inheritance, and cellular functions. The chapter explains the types of biomolecules, including carbohydrates, proteins, lipids, nucleic acids, and enzymes.

Carbohydrates are sugars and starches, which provide energy to the body. Proteins are made up of amino acids and have multiple functions, including catalysis (enzymes), structural roles, and transport. Lipids, which include fats and oils, serve as energy reserves and components of cell membranes. Nucleic acids, such as DNA and RNA, carry genetic information, while enzymes facilitate biochemical reactions.

The chapter also covers the structures and functions of these biomolecules in detail, with a focus on their importance in various biochemical pathways. Understanding the structure-function relationship of biomolecules is crucial for fields such as biotechnology, genetics, and medicine.

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