Biology Biomolecules UHS 2023
PMDC Verified Question 39 of 142
____ forms almost three-fourth of the body by weight.
A
Protein
B
Water
C
Carbohydrates
D
Lipids
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Water
Concept:

All biological reactions occur in an aqueous medium.

Solution:

  • Mammalian cells, extracellular fluids, blood plasma, and intracellular matrices are vastly composed of a single, small inorganic compound.


  • Water constitutes approximately 70% to 75% (nearly three-fourths) of the total mass of an adult human body.


  • This massive aqueous presence is required for thermal regulation, solvent capability, and transport.


Why other options are incorrect:

  • Protein (~18%), Lipids (~10-15%), Carbohydrates (~1%): While these organic macromolecules define structural form and function, their total combined mass is dwarfed by the sheer volume of inorganic water.

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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