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WAEC Biology 2003 Question 27

Question 27

Photosynthesis and Plant Nutrition

Which of the following groups of compounds are products of the light stage of photosynthesis?
I. Ribulose bi-phosphate (RuBP)
II. Nicotin amide di-phosphorous (NADPH2)
III. Oxygen (O2)
IV. Adenosine Triphosphate (ATP)

  1. A.I, II and III
  2. B.I, III and IV
  3. C.II, III and IV
  4. D.I, II, III and IV
Show the answer and explanation

Answer: C (II, III and IV)

Explanation

The light stage splits water, giving oxygen, and makes ATP and NADPH2. RuBP belongs to the dark stage, where it picks up carbon dioxide.