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In the light reactions of photosynthesis, which molecule is produced as a byprod

Practice Questions

Q1
In the light reactions of photosynthesis, which molecule is produced as a byproduct?
  1. Glucose
  2. Oxygen
  3. NADPH
  4. ATP

Questions & Step-by-Step Solutions

In the light reactions of photosynthesis, which molecule is produced as a byproduct?
Correct Answer: Oxygen
  • Step 1: Understand that photosynthesis occurs in two main stages: light reactions and dark reactions.
  • Step 2: Focus on the light reactions, which take place in the thylakoid membranes of chloroplasts.
  • Step 3: Know that during the light reactions, sunlight is absorbed by chlorophyll.
  • Step 4: Realize that this energy is used to split water molecules (H2O).
  • Step 5: When water is split, it produces oxygen (O2) as a byproduct.
  • Step 6: Conclude that the molecule produced as a byproduct during the light reactions is oxygen.
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