Biology Biomolecules AJK 2019
PMDC Verified Question 113 of 142
Pure form of cellulose is:
A
Cellophane
B
Chitin
C
Cotton
D
Paper
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Cotton
Concept:

Cellulose is a linear β-D-glucose polymer found heavily in nature.

Solution:

  • Cotton fibers are renowned for being almost entirely composed of cellulose (upwards of 90-95%), representing the purest natural form of cellulose available.


Why other options are incorrect:

  • Paper & Cellophane: These are manufactured, derivative products made from cellulose, subjected to chemical processing and contain impurities/additives.


  • Chitin: A completely different structural polysaccharide (containing nitrogen) found in fungal walls and arthropod exoskeletons.

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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