Q56 / 180 · AIIMS 2017 · Chemistry

Assertion : Activity of an enzyme is $\mathrm{pH}$-dependent. Reason : Change in $\mathrm{pH}$ affects the solubility of the enzyme in water.

  • A
    If both assertion and reason are true and reason is the correct explanation of assertion.
  • Correct answer
    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

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.

Hence, the correct answer is option: 'B'.

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