Which term is used to refer to an inactive enzyme precursor?
Correct answer: C. Zymogen
- A. Apoenzyme
- B. Null enzyme
- C. Zymogen
- D. Inhibitor
Explanation
Option A: Apoenzyme or apoprotein is an enzymatically inactive protein part of an enzyme, which requires a cofactor for its activity.Option C: Zymogens are the inactive precursors of proteolytic enzymes that become activated in a suitable environment. This term is general, in that it refers to a large variety of proteins.Option D: An enzyme inhibitor is a molecule that binds to an enzyme and blocks its activity
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Enzymes are biological catalysts that lower activation energy without being consumed, and their specificity is explained by the lock and key and induced fit models. Work includes the effects of temperature, pH and substrate concentration on reaction rate, plus competitive and non-competitive inhibition and how these differ.
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