Question

Identify the wrong statements:

(A) The substrate binds to the active site of the enzyme and not fitting into the active site.
(B) The binding of the substrate induces the enzyme to alter its shape.
(C) Chemical bonds of the substrate does not break down to form new enzyme-product complex.
(D) The enzyme releases the reaction and runs through the catalytic cycle once again.

• A. A, C
• B. B, D
• C. B, C
• D. A, D

Answer 1

Answer: (A)

A, C

• The fitting between an enzyme's active site and the substrate is like lock and key. The binding of the substrate induces the enzyme to alter it shape i.e. induced key model.
• The enzyme-substrate complex can also lower activation energy by binding substrate molecules in a way that facilitates bond breaking, helping to reach the transition state.

The enzyme releases the products of the reaction and free enzyme is geared up to bind to another molecule of the substrate and pass through the catalytic cycle once again.

So, the correct option is A.