Biology Bioenergetics NUMS 2023
PMDC Verified Question 36 of 67
Which are the end products of light reactions of photosynthesis?
A
ATP and NADPH
B
ATP and glucose
C
Glucose and NADP
D
ATP and water
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: ATP and NADPH
Concept:

The sole purpose of the light-dependent reactions is to trap solar energy into usable chemical forms for the dark reactions.

Solution:

  • Light energy drives the phosphorylation of ADP to create ATP.
  • Electrons from water are used to reduce \( NADP^+ \) to create NADPH.
  • These two molecules (collectively called assimilatory power) are the crucial end products sent to the stroma.


Why other options are incorrect:

  • Glucose is produced in the light-independent reactions (Calvin cycle).
  • Water is consumed (split via photolysis), not produced, during the light reactions.

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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