The optimum pH for pepsin is approximately
Correct answer: A. 2
- A. 2
- B. 7
- C. 8
- D. 10
Explanation
Pepsin works optimally at pH 1.5-2 in the stomach, where it is activated by HCl.
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About Factors Affecting Enzyme Action
Enzyme activity changes with temperature, pH, substrate concentration and enzyme concentration because these factors affect molecular collisions and the active site. Questions also examine optimum conditions, denaturation and inhibition, while distinguishing a fall in activity caused by unsuitable conditions from permanent enzyme damage.
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