Biology Biomolecules UHS 2024
PMDC Verified Question 1 of 142
What is the percentage of H₂O in bone cells?
A
70%
B
20%
C
99%
D
60%
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: 20%
Concept:

Tissue water content is inversely proportional to the requirement for physical rigidity.

Solution:

  • Most human soft tissues average ~70% water.


  • However, bone cells (osteocytes) are encased in a dense, heavily calcified extracellular matrix designed for maximum rigid structural support.


  • Because this matrix is heavily mineralized, the overall water content of living bone tissue is uniquely low, strictly maintained at roughly 20%.


Why other options are incorrect:

  • 70-60%: Represents standard soft cellular tissues (muscle, liver).


  • 99%: Represents marine invertebrates like jellyfish.

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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