Biology Enzymes SZABMU 2024
PMDC Verified Question 2 of 79
A covalently bonded inorganic ion to protein part of enzyme is termed as:
A
Coenzyme
B
Holoenzyme
C
Apoenzyme
D
Prosthetic group
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Prosthetic group
Concept:

Cofactors are classified based on their permanence on the enzyme. The strength of their chemical bonds dictates their classification.

Solution:

  • When a non-protein component (whether organic or an inorganic ion) binds to the apoenzyme via strong, permanent covalent bonds, it becomes a fixed structural component of the enzyme.
  • This tightly, permanently bound helper is defined strictly as a Prosthetic group.


Why other options are incorrect:

A coenzyme is loosely and temporarily attached. An apoenzyme is just the naked protein without the cofactor. The holoenzyme is the entire active complex (protein + cofactor combined), not the term for the bound ion itself.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

Previous Question All Enzymes MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App