Biology Bioenergetics NUMS 2022
PMDC Verified Question 57 of 67
End product of Calvin cycle is:
A
3-phosphoglycerate
B
1-3 bisphosphoglycerate
C
Glyceraldehyde 3-phosphate
D
Glucose
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Glyceraldehyde 3-phosphate
Concept:

The Calvin cycle synthesizes a 3-carbon sugar directly, which the plant then uses to synthesize larger carbohydrates.

Solution:

  • The actual carbohydrate product expelled by the Calvin cycle is Glyceraldehyde 3-phosphate (G3P).
  • For every three molecules of \( CO_2 \) that enter the cycle, one molecule of G3P is released as a net product.


Why other options are incorrect:

  • Glucose: is synthesized later in the cytoplasm by combining two molecules of G3P. It is not the direct end product of the cycle itself.
  • 3-phosphoglycerate & 1,3-bisphosphoglycerate: are intermediate compounds formed prior to the reduction phase of the cycle.

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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