Biology Enzymes MDCAT 2018
PMDC Verified Question 68 of 79
A non-protein part essential for proper and essential functioning of enzyme is called:
A
Extra factor
B
Co-factor
C
Efficient co-factor
D
Additional factor
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Co-factor
Concept:

While all enzymes are proteins, many require an additional non-amino acid component to become fully catalytically active.

Solution:

  • This essential non-protein component is universally termed a co-factor.
  • Co-factors usually act as a bridge between the enzyme and its substrate, or directly participate in the chemical reaction (e.g., electron transfer).


Why other options are incorrect:

'Extra factor', 'Efficient co-factor', and 'Additional factor' are completely fabricated distractor terms that have no meaning in biochemistry.

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.

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