Which one of the following pairs of enzymes do <strong>NOT</strong> work at acidic pH?

  1. A. Trypsin and Pepsin
  2. B. Chymotrypsin and Pepsin
  3. C. Trypsin and Amylase
  4. D. Pepsin and Amylase

Correct Answer: C. Trypsin and Amylase

Explanation

Trypsin and amylase function optimally at an alkaline pH (in the small intestine and mouth respectively), whereas pepsin specifically requires an acidic pH (in the stomach) to function.

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