In the following question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices:
Assertion: Activity of an enzyme is pH dependent .
Reason : Change in pH affects the solubility of the enzyme in water.
Answer & explanation
Correct answer: option 2
The activity of an enzyme is pH-dependent. The activity of an enzyme is maximum at pH = 7.4 (physiological pH). In fact, as pH is increased, the enzyme activity rises, reaches a maximum level and then falls off.
Change in pH affects the solubility of the enzyme in water.