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Which pair is correctly matched?

  • (a) Cyclic photophosphorylation - evolution of O2 Your answer
  • (b) Non-cyclic photophosphorylation - PS II and PS I Correct
  • (c) Non-cyclic photophosphorylation - PS I alone Your answer
  • (d) Cyclic photophosphorylation - ATP and NADPH both Your answer
Your answer: Correct answer: (b)
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Explanation

Why (b) is correct

Non-cyclic photophosphorylation involves both PS II and PS I. The other pairs are wrong.

Why the other options are wrong

  • (a) · your answer Cyclic flow does not evolve O2.
  • (c) · your answer Non-cyclic flow needs both photosystems, not PS I alone.
  • (d) · your answer Cyclic flow forms ATP only, not NADPH.
NCERT point: Non-cyclic: ATP + NADPH + O2.
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