---
type: "Chapter"
knowledge_type: "chapter"
entity_type: "chapter"
id: "66f147ea0821118bf5c5ea5c"
title: "Biomolecules"
board: "CBSE"
curriculum: "CBSE"
class: "Class 11"
subject: "Biotechnology"
book: "Biotechnology"
chapter: "Biomolecules"
chapter_slug: "biomolecules"
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source: "Edzy"
version: 1
last_updated: "2026-06-20"
---

# Biomolecules

Biomolecules are essential macromolecules found in all living organisms. They constitute fundamental components of cellular organelles, including cell membranes, cell walls, and chromosomes which perform various vital functions in cellular processes.

## Knowledge Snapshot

| Field | Details |
| :--- | :--- |
| Class | Class 11 |
| Subject | Biotechnology |
| Book | Biotechnology |
| Chapter | Biomolecules |
| Pages | 50-84 |

## Chapter Summary

### Short Summary
This chapter explores the structures and functions of biomolecules, specifically carbohydrates, proteins, lipids, and nucleic acids, which are crucial for cellular processes.

### Detailed Summary
Biomolecules serve as structural entities of cells and participate in various cellular functions. Carbohydrates, one of the key classes, are categorized into monosaccharides, oligosaccharides, and polysaccharides, each playing significant roles in energy production and storage as well as being part of structural components in organisms. The chapter provides detailed classifications, structures, and properties of these carbohydrates, emphasizing their critical functions within biological systems.

## Topic-Wise Explanation

### Carbohydrates
Carbohydrates are abundant biomolecules structured as derivatives of aldehydes and ketones of polyhydric alcohols, primarily serving as a major energy source and structural components in cells. They are classified into monosaccharides, oligosaccharides, and polysaccharides, each with unique properties and functions.

### Fatty Acids and Lipids
[Omission: This topic is not covered in the context.]

### Amino Acids
[Omission: This topic is not covered in the context.]

### Protein Structure
[Omission: This topic is not covered in the context.]

### Nucleic Acids
[Omission: This topic is not covered in the context.]

## Core Ideas

| Idea | Explanation |
| :--- | :--- |
| Classification of Carbohydrates | Carbohydrates are classified into monosaccharides, oligosaccharides, and polysaccharides based on structure and composition. |

## Key Concepts

| Concept | Meaning |
| :--- | :--- |
| Monosaccharides | Simple sugars that cannot be hydrolyzed further, possessing free aldehyde or ketone groups. |
| Oligosaccharides | Carbohydrates of 2 to 10 monosaccharide units linked together by glycosidic bonds. |
| Polysaccharides | Carbohydrate polymers with more than 10 monosaccharide units linked together. |

## Important Points for Revision

* Biomolecules include carbohydrates, proteins, lipids, and nucleic acids.
* Carbohydrates are major energy sources and structural components in organisms.
* The three main types of carbohydrates are monosaccharides, oligosaccharides, and polysaccharides.
* Monosaccharides are classified by the number of carbon atoms and functional groups.
* Oligosaccharides consist of 2 to 10 monosaccharides linked by glycosidic bonds.
* Polysaccharides include starch, glycogen, cellulose, and chitin.
* Glycoconjugates, such as glycoproteins and glycolipids, are formed by linking carbohydrates with proteins or lipids.
* Monosaccharides exhibit structures that can be cyclic or linear and possess chiral centers.
* Mutarotation is the interconversion between α and β anomers in aqueous solutions.

## Vocabulary and Glossary

| Word / Phrase | Meaning |
| :--- | :--- |
| Glycoconjugates | Molecules formed from carbohydrates linked to proteins or lipids. |

## Practice Questions

### Short Answer Questions
1. What are the main types of carbohydrates?
2. Define monosaccharides and give two examples.
3. What role do carbohydrates play in living organisms?
4. Describe the structure of glucose.
5. What is mutarotation?

### Long Answer Questions
1. Explain the classification of carbohydrates with examples.
2. Discuss the structural differences between aldoses and ketoses.
3. Describe the significance of glycoconjugates in biological systems.

## Related Concepts
[Omission: No related concepts are mentioned in the context.]

## Source Attribution

| Field | Value |
| :--- | :--- |
| Source | Edzy |
| Reference Type | examSubjectBookChapter |
| Reference ID | 66f147ea0821118bf5c5ea5c |
| Canonical URL | https://www.edzy.ai/cbse-class-11-biotechnology-biomolecules |
| Markdown URL | https://www.edzy.ai/okf/chapter/cbse-class-11-biotechnology-biomolecules.md |