Biology Biomolecules SZABMU 2022
PMDC Verified Question 90 of 142
Select an example of fibrous protein:
A
Enzymes
B
Collagen
C
Hemoglobin
D
Hormones
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Collagen
Concept:

Proteins are structurally classed into two main groups: fibrous (long, structural strands) and globular (spherical, functional folded units).

Solution:

  • Collagen consists of three polypeptide chains wrapped around each other into a tough, rope-like triple helix.


  • This extended, uncoiled macroscopic shape makes it the classic example of a fibrous protein, granting immense tensile strength to tendons, ligaments, and skin.


Why other options are incorrect:

  • Enzymes, Hemoglobin, Hormones: These perform highly specific, dynamic metabolic tasks (catalysis, transport, signaling) and must fold into complex 3D spherical active shapes, making them strictly globular proteins.

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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