Biology Biomolecules SZABMU 2022
PMDC Verified Question 91 of 142
Which function is not performed by proteins?
A
Providing structural support to cell
B
Catalyzing biochemical reactions
C
Transporting materials across cell membrane
D
Providing insulation against heat loss
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Providing insulation against heat loss
Concept:

While proteins are the most versatile macromolecules in the body, certain passive, long-term physiological roles are delegated to other biomolecules.

Solution:

  • Providing insulation against heat loss is fundamentally the physiological role of adipose tissue (fat), which consists of lipids (specifically triglycerides).


  • Lipids form thick, non-conductive subcutaneous layers (like blubber) that trap heat, a function proteins do not inherently perform.


Why other options are incorrect:

  • Structural support: Performed by fibrous proteins like cytoskeleton, collagen, and keratin.


  • Catalyzing reactions: Performed by enzymatic proteins.


  • Transporting materials: Performed by channel/carrier proteins and hemoglobin.

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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