Digestive enzymes MCQ - Practice Questions with Answers

Rennin, also called chymosin, acts on milk protein, especially casein, and curdles milk in the stomach of infants. That makes it the enzyme linked with digestion of milk protein in the standard school-level treatment of this question. Pepsin digests proteins generally in the stomach but is not the specific milk-curdling enzyme asked here. Trypsin acts in the small intestine on proteins and peptides. Erepsin completes peptide digestion into amino acids, so it is not the answer.