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Question: Answered & Verified by Expert
Assertion : Activity of an enzyme is $\mathrm{pH}$-dependent.
Reason : Change in $\mathrm{pH}$ affects the solubility of the enzyme in water.
ChemistrySurface ChemistryAIIMSAIIMS 2017
Options:
  • A If both assertion and reason are true and reason is the correct explanation of assertion.
  • B If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C If assertion is true but reason is false.
  • D If both assertion and reason are false.
Solution:
1929 Upvotes Verified Answer
The correct answer is: If both assertion and reason are true but reason is not the correct explanation of assertion.
Activity of enzyme is maximum at $\mathrm{pH}=7.4$ (physiological $\mathrm{pH}$ ). In fact, as $\mathrm{pH}$ is increased, the rate rises to a maximum and then falls off.

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