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Zoology · Biomolecules

NEET (UG) 2023 — Question 125

Given below are two statements : one is labelled as Statement I and the other is labelled as Statement II :

Statement I: Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity because proteins are denatured by heat.

Statement II: When the inhibitor closely resembles the substrate in its molecular structure and inhibits the activity of the enzyme, it is known as competitive inhibitor.

In the light of the above statements, choose the most appropriate answer from the options given below:

  1. Option A:

    Both statement I and statement Il are incorrect.

  2. Option B:

    Statement I is correct and statement Il is incorrect.

  3. Option C:

    Statement I is incorrect and statement Il is correct.

  4. Option D:

    Both statements 1 and statements ll are correct.

    Correct

Answer: D

Step-by-step solution

The correct answer is option (4) as low temperature preserves the enzyme in a temporarily inactive

state whereas high temperature destroys enzymatic activity because proteins are denatured by heat.

• Competitive inhibitor due to its close structural similarity with the substrate, competes with

the substrate for the substrate-binding site of the enzyme.

Answer key and solution verified before publishing.

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Exam
NEET (UG) 2023
Paper
2023 paper
Subject
Zoology
Chapter
Biomolecules
Topic
Enzymes

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