The GATE Grind

GATE 2026 BT – Question 25

General Biology · Biochemistry: Metabolism of carbohydrates, lipids, amino acids and nucleic acids, glycolysis, citric acid cycle, fatty acid oxidation, photosynthesis, respiration and electron transport · 1 mark · Multiple choice

Which one of the following options represents the products of light reactions of photosynthesis in plants?

  1. $O_2$/NADH/$H_2$
  2. $O_2$/NADP$^+$/$CO_2$
  3. $O_2$/NADPH/ATP
  4. $O_2$/NADP$^+$/ATP

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Correct answer: (C) $O_2$/NADPH/ATP

Explanation

The light reactions split water to give $O_2$, and the electron transport makes NADPH and ATP, which the Calvin cycle uses to fix $CO_2$.