Zoology - Digestion and Absorption Question with Solution | TestHub

Zymogen or pro-enzymes are inactivated forms of enzymes that get activated by certain conditions.

Fundic glands secrete pepsinogen. It is a zymogen that gets converted into pepsin in the presence of HCl. Pancreatic acini secrete trypsinogen, chymotrypsinogen, and procarboxypeptidase which are all zymogens. Parotid glands secrete salivary amylase which is not a pro-enzyme. The enzymes secreted by intestinal glands such as nucleotidase, nucleosidase, sucrose, lactase, maltase, aminopeptidase, dipeptidase, lipase are all secreted in the active form and are not zymogens