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Which compound is NOT an intermediate of the Calvin cycle?

  • (a) oxaloacetic acid Correct
  • (b) RuBP Your answer
  • (c) triose phosphate Your answer
  • (d) 3-PGA Your answer
Your answer: Correct answer: (a)
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Explanation

Why (a) is correct

Oxaloacetic acid is the first product of the C4 pathway; it is not an intermediate of the Calvin cycle.

Why the other options are wrong

  • (b) · your answer RuBP is the acceptor in the Calvin cycle.
  • (c) · your answer Triose phosphate is formed in the reduction stage.
  • (d) · your answer 3-PGA is the first product of the Calvin cycle.
NCERT point: Calvin cycle compounds: RuBP, 3-PGA, triose phosphate.
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