Biology Bioenergetics ETEA 2022
PMDC Verified Question 67 of 67
In aerobic respiration, glucose molecule is completely broken down into \( CO_2 \), \( H_2O \) and _.
A
2 ATP
B
4 ATP
C
34 ATP
D
36 ATP
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: 36 ATP
Concept:

Aerobic cellular respiration maximizes the extraction of energy from a single glucose molecule.

Solution:

  • In eukaryotic cells, the complete oxidation of one glucose molecule yields a net total of roughly 36 ATP.
  • This includes 2 net ATP from glycolysis, 2 from the Krebs cycle, and 32 from the electron transport chain.


Why other options are incorrect:

  • 2 ATP is the yield from anaerobic respiration (glycolysis only).
  • 34 ATP represents just the typical output of the electron transport chain (or an intermediate estimate), not the complete net yield.

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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