Question

..................... is called as inactive precursor of an enzyme.

• A. Apoenzyme
• B. Proenzyme
• C. Zymogen
• D. Both B and C

Answer 1

The correct option is D Both B and C

Activation of an enzyme by proteolytic cleavage is a type of regulatory mechanism. An inactive precursor of the enzyme called as zymogen, is cleaved to form the active enzyme. Many proteolytic enzymes of the stomach and pancreas are regulated this way. Another term used for zymogens is proenzyme. Proenzymes are inactive precursors of the enzyme.