Biology Enzymes SZABMU 2023
PMDC Verified Question 20 of 79
Non protein but inorganic detachable co-factor is called:
A
Prosthetic group
B
Co-enzyme
C
Activator
D
Apoenzyme
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Activator
Concept:

Co-factors are classified by two distinct properties: their chemical composition (organic vs. inorganic) and how tightly they bind to the enzyme (detachable vs. permanent).

Solution:

  • If a co-factor is inorganic (usually a metal ion like \( \text{Mg}^{2+} \) or \( \text{Zn}^{2+} \)) and detaches easily after the reaction, it is explicitly defined as an Activator.


Why other options are incorrect:

A Co-enzyme is detachable but is strictly organic (like NAD). A Prosthetic group is permanent/covalently bonded (can be organic or inorganic). The apoenzyme is the protein part itself.

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