Biology for IGCSE & O level - Enzymes (Section 4 - No. 2)
What happens to the enzyme if it is exposed to an environment outside of its optimal pH?
The enzyme becomes more effective.
The enzyme becomes denatured.
The enzyme's reaction rate increases.
Nothing; pH doesn't affect enzymes.
Explanation
When an enzyme is exposed to an environment outside of its optimal pH, the shape of the active site is altered, leading to denaturation and a loss of catalytic activity.
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