Which substance is NOT involved in protein digestion?

Question

Quizplus · Accepted Answer

Salivary proteases do not play a significant role in protein digestion. They are present in the mouth and help break down some proteins during chewing, but their action is limited and mostly inactive by the acidic environment of the stomach. The other choices (A, B, D, and E) are all involved in protein digestion in the stomach and small intestine. Pepsin and hydrochloric acid are secreted by the stomach and start the breakdown of proteins. Brush border enzymes and pancreatic proteases are secreted by the small intestine and help further break down proteins into smaller peptides and amino acids.

Which Substance Is NOT Involved in Protein Digestion