Discussion
Which enzyme is responsible for the digestion of proteins in the stomach?
Answer: C
Proteins are digested in the stomach by pepsin.
The stomach's chief cells secrete pepsinogen, which hydrochloric acid converts into the active enzyme pepsin. Pepsin breaks proteins into smaller peptides in the acidic conditions of the stomach.
Amylase digests starch, lipase digests fats and maltase splits maltose, so none of them digests protein.
Digestion of protein is completed in the small intestine by trypsin and other enzymes from the pancreas, after pepsin has begun the process in the stomach.
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