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Chapter 4 of 12
Chapter Summary

Enzymes and Bioenergetics

CBSE · Class 11 · Biotechnology

Summary of Enzymes and Bioenergetics for CBSE Class 11 Biotechnology. Key concepts, important points, and chapter overview.

58 questions80 flashcards5 concepts

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Overview

Enzymes are highly specific biocatalysts that speed up biochemical reactions in living systems without being used up. Most enzymes are proteins, while ribozymes are the small exception made of catalytic RNA. Their action depends on active sites, cofactors, temperature, pH, and substrate concentratio

Key Concepts

Enzymes catalyse biochemical reactions both

Enzymes catalyse biochemical reactions both in vivo and in vitro. They have great catalytic power and are highly specific for substrates. Their molecu

All enzymes are proteins except

All enzymes are proteins except a small group of catalytic RNA molecules called ribozymes.

Many enzymes need cofactors for activity

Many enzymes need cofactors for activity. A cofactor may be a coenzyme or a metal ion. The protein part alone is the apoenzyme, and the complete activ

Enzymes are classified into seven classes

Enzymes are classified into seven classes based on the reaction they catalyse: oxidoreductases, transferases, hydrolases, lyases, isomerases, ligases,

Isozymes are multiple molecular forms

Isozymes are multiple molecular forms of the same enzyme present in the same species, tissue, or cell. They catalyse the same reaction but may differ

Learning Objectives

  • Understand the nature, properties, and structure-related behaviour of enzymes
  • Learn enzyme classification by the International Union of Biochemistry system
  • Explain enzyme specificity, active site function, and the lock and key and induced fit models
  • Describe how temperature, pH, and substrate concentration affect enzyme activity
  • Interpret Michaelis-Menten kinetics and the meaning of Km and Vmax

Frequently Asked Questions

What are the important topics in Enzymes and Bioenergetics for CBSE Class 11 Biotechnology?
Enzymes and Bioenergetics covers several key topics that are frequently asked in CBSE Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Enzymes and Bioenergetics — CBSE Class 11 Biotechnology?
Understand the core concepts first, then work through the 58 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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