Biology Biomolecules ETEA 2019
PMDC Verified Question 115 of 142
Chitin is a:
A
Lipoprotein
B
Phospholipid
C
Polysaccharide
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 C: Polysaccharide
Concept:

Chitin is a modified, nitrogen-containing biological macromolecule.

Solution:

  • Chitin is a structural polysaccharide.


  • Unlike standard carbohydrates, it is a polymer composed of N-acetylglucosamine monomers.


  • It forms the structural backbone of fungal cell walls and the hard exoskeletons of arthropods (insects, crustaceans).


Why other options are incorrect:

  • Lipoproteins/Phospholipids: These are lipid-based structures related to transport and cell membranes.


  • Glycoprotein: A protein with a small carbohydrate chain attached, completely structurally distinct from the pure carbohydrate polymer chitin.

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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