The enzyme _______, secreted by the _______, activates a zymogen to produce the active protease _______, which can activate other proteases.

Question

Quizplus · Accepted Answer

Enterokinase is secreted by the small intestine and activates the zymogen trypsinogen to produce the active protease trypsin, which can then activate other proteases. Carboxypeptidase and chymotrypsin are also active proteases involved in protein digestion but are not activated by enterokinase. Pancreatic enzymes, including trypsinogen, are secreted by the pancreas, but trypsinogen must first be activated by enterokinase in the small intestine. Therefore, option A is the best choice.

The Enzyme _______, Secreted by the _______, Activates a Zymogen

The Enzyme _, Secreted by the _, Activates a Zymogen