Biology Cell NUMS 2023
PMDC Verified Question 33 of 143
Which of the following is absent from membrane of prokaryotes?
A
Phospholipid
B
Cholesterol
C
Glycolipid
D
Glycoprotein
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Cholesterol
Concept: Prokaryotic and eukaryotic plasma membranes share a basic lipid bilayer but differ in their stabilizing molecules.

Solution: Cholesterol is a sterol exclusively found in the cell membranes of eukaryotes (particularly animals), acting as a fluidity buffer. Prokaryotic membranes lack cholesterol (some use hopanoids instead).

Distractor Autopsy: Both prokaryotes and eukaryotes utilize phospholipids as their primary membrane matrix, along with glycoproteins and glycolipids for varied functions.

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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