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Question

The proteolytic enzyme found in gastric juice of infants which helps in digestion of milk protein is ______.

A
Rennin
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B
Salivary amylase
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C
Pepsin
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D
Lactase
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Solution

The correct option is A Rennin
  • The proteolytic enzyme found in the gastric juice of infants that helps in the digestion of milk protein is renin. Rennin cells are synthesized by chief cells. It is also known as chymosin. It helps in the coagulation of the milk in the stomach. It converts liquid milk to semisolid. It is present as a zymogen (inactive precursor of enzymes) in the stomach. In the presence of hydrochloric acid, pro-rennin is converted into rennin. It is secreted as an inactive prochymosin.
  • Salivary amylase breaks down carbohydrates into maltose.
  • Pepsin breaks down proteins into peptides. Pepsin is an enzyme that is present in an inactive form, pepsinogen.
  • Lactase is responsible for the breakdown of lactose into galactose and glucose.
  • Hence, the correct answer is option A.

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