NCERT Class 11 Biotechnology Biotechnology: Chapter 2 — Biomolecules
This chapter, Biomolecules, is part of Unit II of the NCERT Class 11 Biotechnology textbook. It follows the chapter on Cellular Organelles and precedes the chapter on Enzymes and Bioenergetics. The unit focuses on understanding the cell as the fundamental unit of life, detailing its structure, growth, and theory. Chapter 3 specifically delves into the molecular compounds essential for cellular processes and sustaining life. It highlights the role of biocatalysts (enzymes) in facilitating biochemical reactions, which will be further discussed in the subsequent chapter. The chapter aims to provide students with a foundational understanding of the molecular basis of living systems, crucial for comprehending biological functions and advancements in biotechnology.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 11 |
| Subject | Biotechnology |
| Book | Biotechnology |
| Chapter | Chapter 2 — Biomolecules |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 2 minutes |
| Word count | 328 |
Learning outcomes
- Identify the key biomolecules present in living systems.
- Understand the structure and function of major classes of biomolecules.
- Appreciate the role of biomolecules in cellular processes.
- Recognize the importance of enzymes as biocatalysts.
Vocabulary
| Word | Meaning |
|---|---|
| Biomolecules | Organic and inorganic compounds that are found in living organisms and are essential for life. |
| Cellular Organelles | Specialized structures within a cell that perform specific functions. |
| Enzymes | Biological catalysts that speed up biochemical reactions. |
| Bioenergetics | The study of energy transformations in living organisms. |
| Biopolymers | Large molecules composed of repeating structural units (monomers). |
| Conformational Analysis | The study of the three-dimensional shapes of molecules and how they can change. |
| Ramachandran Plot | A plot used to visualize the allowed and disallowed conformations of amino acid residues in proteins. |
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Practice questions
- What is the main focus of Chapter 3, Biomolecules? Answer: Chapter 3 focuses on the molecular compounds responsible for carrying out various cellular processes and sustaining living systems.
- What is the role of biocatalysts in living systems? Answer: Biocatalysts, or enzymes, help in carrying out various biochemical reactions in a living system effectively.
- Who was G.N. Ramachandran and what is his significant contribution? Answer: G.N. Ramachandran was a scientist known for his work on the Triple Helical Structure of Collagen and the development of the 'Ramachandran plot' for analyzing protein conformations.
Frequently asked questions
What is the correct chapter title for Chapter 3 in NCERT Class 11 Biotechnology?
The correct chapter title for Chapter 3 is 'Biomolecules'.
What is the main theme of Unit II in the NCERT Class 11 Biotechnology textbook?
Unit II focuses on understanding the cell as the structural and functional unit of life, covering its characteristics, structure, growth, and molecular components.
Which chapter discusses enzymes in detail?
Chapter 4, 'Enzymes and Bioenergetics', discusses the importance of biocatalysts and their mechanism of action.
What is the significance of biomolecules in living systems?
Biomolecules are essential compounds responsible for carrying out various cellular processes and sustaining living systems.
Who developed the 'Ramachandran plot'?
The 'Ramachandran plot' was developed by G.N. Ramachandran.
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NCERT Class 11 Biotechnology — Biotechnology — Chapter 2 — Biomolecules. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.