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An enzyme that curdles milk by converting caseinogen into casein is-

  • A.Pepsin
  • B.Gastrin
  • C.Rennin
  • D.Lipase

Answer: C

The enzyme is rennin.

Rennin (chymosin) is secreted in the stomach of infants, especially of young calves. It converts the soluble milk protein caseinogen into casein, which combines with calcium to form a curd. Curdling keeps milk in the stomach longer, so protein-digesting enzymes have more time to act.

Pepsin digests proteins into peptides but is not the curdling enzyme. Gastrin is a hormone that stimulates gastric juice secretion, not an enzyme. Lipase digests fats.

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