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JAMB Biology 1995 Question 11

Question 11

Photosynthesis and Plant Nutrition

2H2O → 2H2 + O2(g). The equation above represents a part of the light stage of photosynthesis. Which of the following must be present for this reaction to occur?

  1. A.Enzyme and light energy
  2. B.Carbondioxide and light energy
  3. C.Light energy and chlorophyll
  4. D.Chlorophyll and enzyme.
Show the answer and explanation

Answer: C (Light energy and chlorophyll)

Explanation

Splitting water (photolysis) needs light energy trapped by chlorophyll; carbon dioxide is used later, in the dark stage.