Biology Bioenergetics DUHS 2022
PMDC Verified Question 65 of 67
Net ATP produced at the end of glycolysis:
A
2 ATP
B
4 ATP
C
6 ATP
D
3 ATP
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: 2 ATP
Concept:

Glycolysis includes an investment (preparatory) phase and a payoff phase.

Solution:

  • During the preparatory phase, the cell consumes 2 ATP to phosphorylate glucose.
  • During the payoff phase, substrate-level phosphorylation produces a total of 4 ATP.
  • The net gain is calculated as: 4 (produced) - 2 (invested) = 2 ATP.


Why other options are incorrect:

  • 4 ATP is the gross production, not the net.
  • 6 and 3 ATP do not reflect the stoichiometry of glycolysis.

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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