Biology · Enzymes

Rennin, also known as chymosin, is the correct answer. It is an enzyme found in the gastric juice of many infant mammals, including humans, that helps in the digestion of milk protein by coagulating it. The other options are incorrect because 'Renin' is a misspelling of the correct enzyme 'Rennin', 'Personage' is not a relevant enzyme, and 'Gastrin' is a hormone, not an enzyme involved in milk protein digestion.

Renin: Renin is an enzyme found in the gastric juice of many infant mammals, including humans. It plays a crucial role in the digestion of milk protein by causing its precipitation and curdling, which aids in the digestion process.

Personage: There is no specific enzyme called 'personage' related to the digestion of milk protein. It seems to be a misspelling or incorrect term.

Rennin: Rennin is another name for the enzyme renin. It is present in the gastric juice of infant mammals and helps in the digestion of milk protein by coagulating it.

Gastrin: Gastrin is not an enzyme involved in the digestion of milk protein. It is a hormone produced in the stomach that regulates the secretion of gastric acid and stimulates gastric motility.