Formation of enzyme-substrate complex (E | Class 11 Biology Chapter Biomolecules, Biomolecules NCERT Solutions

Current NCERT chapter

Academic session 2026-27, Chapter 9 in the current curriculum.

Welcome to the NCERT Solutions for Class 11 Biology - Chapter Biomolecules. This page offers a step-by-step solution to the specific question from Exercise 0, Question 1:

Formation of enzyme-substrate complex (ES) is the first step in catalysed reactions. Describe the other steps till the formation of product.
 

. With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 1:

Formation of enzyme-substrate complex (ES) is the first step in catalysed reactions. Describe the other steps till the formation of product.
 

Answer:

The combination of two is known as enzyme- substrate complex (ES). The enzyme molecule operated by chemically uniting with the substrate molecules. Steps that are followed during the catalytic cycle of an enzyme action are:

  1. The substrate binds to the active site of the enzyme which fits into the active site.
  2. Because of binding substrate, the enzyme induced to alter its size and will fit more tightly.
  3. A new complex enzyme is formed when the active site of the enzyme breaks the chemical bonds of the substrate.
  4. The enzyme releases the product of the reaction and the free enzyme is ready to bind another molecule of the substrate and run through catalytic cycle once again.
  5. When the enzyme- substrate complex is made, the product leaves the enzymes surface and is now free to receive a new set of starting molecules. Thus, the same enzyme is being used again and again.

Some reactions are as follows:

enzymes

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

  • Read the question carefully and focus on the core concept being asked.
  • Reference examples and data from the chapter when answering questions about Biomolecules.
  • Review previous year question papers to get an idea of how such questions may be framed in exams.
  • Practice answering questions within the time limit to improve your speed and accuracy.
  • Discuss your answers with your teachers or peers to get feedback and improve your understanding.

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Welcome to the NCERT Solutions for Class 11 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 0 , Question 1: Formation of enzyme-substrate complex (ES) is the first step in catalysed reactions. Describe the ot....

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