Biology Biomolecules UHS 2023
PMDC Verified Question 42 of 142
The specific heat of vaporization of water plays an important role in the regulation of heat produced by ____.
A
Reduction
B
Redox
C
Oxidation
D
None of above
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Oxidation
Concept:

Metabolism is fundamentally an exothermic burning of carbon fuels, requiring an efficient cooling system.

Solution:

  • Cellular respiration continuously extracts energy from food molecules (like glucose) primarily through severe Oxidation reactions (stripping away high-energy hydrogen electrons).


  • These massive oxidative cascades are not 100% efficient; large amounts of the energy are inevitably lost as waste heat.


  • If not removed, this oxidative waste heat would denature cellular enzymes. The body utilizes water's high heat of vaporization (sweating) to absorb and carry away this specific metabolic heat.


Why other options are incorrect:

  • Reduction: Usually requires energy input, rather than releasing waste heat.


  • Redox: While respiration involves redox entirely, "oxidation of food" is the specific term universally used to describe the heat-generating breakdown of carbon fuels.

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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