Biology Biomolecules SZABMU 2023
PMDC Verified Question 66 of 142
The basic structural framework of all types of membranes is:
A
Glycolipids
B
Glycoproteins
C
Lipoproteins
D
Nucleoproteins
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Lipoproteins
Concept:

Biological membranes are fundamentally fluid mosaics composed of two distinct macromolecule classes working in tandem.

Solution:

  • The universal architecture of all biological membranes is a phospholipid bilayer extensively embedded with integral and peripheral proteins.


  • Because a membrane is essentially a massive, co-assembled structure of lipids providing the barrier and proteins providing the function, this entire structural framework is broadly classified as a massive Lipoprotein complex (a conjugated structure of lipids and proteins).


Why other options are incorrect:

  • Glycolipids & Glycoproteins: These are minor surface modifications for recognition, not the bulk basic structural framework spanning the entire membrane.


  • Nucleoproteins: Complexes of DNA/RNA and protein (like chromatin or ribosomes), completely unrelated to membranes.

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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