The optimum pH at which the enzymes pepsin and trypsin of the human alimentary canal works are
- A. pH 2.0 and 7-9, respectively ✓
- B. pH 4.5 and 3.5, respectively
- C. pH 9.5 and 4.5, respectively
- D. pH 7.0 and 8.0, respectively
Correct Answer: A. pH 2.0 and 7-9, respectively
Explanation
Pepsin works optimally in the highly acidic environment of the stomach (pH ~2.0), whereas trypsin functions optimally in the alkaline environment of the small intestine (pH ~7 to 9).
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