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Complete digestion of protein occurs □ around pH 8 2 in the stomach D in the absence of pepsin. in the small intestine.

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Final answer:

Protein digestion occurs in two stages: the stomach and the small intestine. In the stomach, pepsin breaks down proteins into smaller polypeptides. In the small intestine, further protein digestion occurs with the help of enzymes such as trypsin and chymotrypsin.

Step-by-step explanation:

Proteins are digested in two stages: the stomach and the small intestine. In the stomach, protein digestion begins with the enzyme pepsin, which is activated by the highly acidic environment. Pepsin breaks down proteins into smaller polypeptides. The partially digested food, known as chyme, then enters the small intestine, where further protein digestion takes place with the help of enzymes such as trypsin and chymotrypsin.

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