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प्रश्न
Describe protein digestion in the human.
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उत्तर
Digestion of proteins in humans:
There is no digestion of protein in the oral cavity because protein digestive enzymes are absent in the saliva.
1. Digestion of protein in the stomach:
Gastric juice contains HCl and two proenzyme, pepsinogen and prorennin. HCI maintains a pH of 2 - 3.7 and kills bacteria and other pathogens. Gastric juice mixes with food until it becomes semi-solid mass called Chyme. Proenzymes become activated as below:
These enzymes act as follows:
2. Digestion of protein the small intestine
Action of pancreatic juice. It contains proenzymes trypsinogen, chymotry-psinogen and procarboxy peptidase.
Action of intestinal juice. Intestinal juice contains endokinase, aminopeptidase and dipeptidase. Actions of these enzymes are summarized below:
Peptides —Aminopentidase _. cm aller peptides + Amino acid
Peptides —Dipentidase_. amino acid
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