Biology Cell SZABMU 2024 Reconduct
PMDC Verified Question 27 of 143
A group of ribosomes attached to mRNA is known as polysome and the attachment is controlled by:
A
\(\text{Mg}^{+2}\)
B
\(\text{Na}^+\)
C
\(\text{Ca}^{+2}\)
D
\(\text{K}^+\)
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: \(\text{Mg}^{+2}\)
Concept: The structural integrity of the ribosome depends on specific divalent cations.

Solution: The two subunits (large and small) of a ribosome only associate to form a functional translation complex on an mRNA strand in the presence of adequate concentrations of magnesium ions, \(\text{Mg}^{+2}\).

Distractor Autopsy: Sodium, Calcium, and Potassium are vital for electrical signaling and muscle contraction, but do not mediate ribosomal subunit joining.

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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