Biology for IGCSE & O level - Human Nutrition (Section 9 - No. 8)
Which of the following contributes to the digestion of proteins?
Pepsin in the stomach.
Trypsin in the small intestine.
Amylase in the mouth.
Hydrochloric acid in the stomach.
Explanation
Pepsin and trypsin are protein-digesting enzymes. Hydrochloric acid provides an optimal environment for pepsin. Amylase digests starch.
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