All of the following are examples of a zymogen and its activating protease EXCEPT:
A) chymotrypsinogen and chymotrypsin.
B) procarboxypeptidase and elastase.
C) proelastase and elastase.
D) pepsinogen and pepsin.
E) trypsinogen and trypsin.

Question

Quizplus · Accepted Answer

Procarboxypeptidase and elastase are not zymogen and activating protease pair. They are both enzymes involved in protein digestion, but they do not have a zymogen-activated protease relationship. The other choices all match a zymogen with its activating protease. Chymotrypsinogen is activated by chymotrypsin, proelastase is activated by elastase, pepsinogen is activated by acid in the stomach, and trypsinogen is activated by enterokinase.

All of the Following Are Examples of a Zymogen and Its