Briefly explain the digestion, absorption and utilization of protein in our body.

Proteins taken in the diet are digested to amino acids in the stomach and small intestine. Gastric juice contains enzymes pepsin which digests protein in acid medium. It hydrolyses proteins to polypeptides.

Dietary Protein -> Pepsin -> Polypeptides

In the small intestine, pancreatic and intestinal juices contain proteolytic enzymes. Pancreatic juice contains trypsin, chymotrypsin and carboxyl peptidase.

They hydrolyse large protein molecule to smaller

polypeptide.

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