Biology Cell NTS 2019
PMDC Verified Question 109 of 143
Cell permeability and transport processes of cell membrane depend upon its ____ component.
A
Cellulose
B
Carbohydrate
C
Polysaccharide
D
Phospholipid
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Phospholipid
Concept: The fundamental barrier to the movement of substances across a cell membrane is lipid in nature.

Solution: The phospholipid bilayer is the core component that regulates permeability. Its hydrophobic core strictly prevents the free passage of polar molecules and ions, making the membrane differentially permeable.

Distractor Autopsy: Carbohydrates act as recognition markers. Cellulose is not found in the cell membrane (it forms the plant cell wall).

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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