Back to your test review

The total number of ATP used in the Calvin cycle to fix three molecules of CO2 is

  • (a) 6 Your answer
  • (b) 9 Correct
  • (c) 12 Your answer
  • (d) 18 Your answer
Your answer: Correct answer: (b)
Advertisement

Explanation

Why (b) is correct

The Calvin cycle uses 3 ATP per CO2, so fixing three CO2 uses 9 ATP.

Why the other options are wrong

  • (a) · your answer Six would be only 2 ATP per CO2.
  • (c) · your answer Twelve would be 4 ATP per CO2.
  • (d) · your answer Eighteen ATP are used for six CO2, not three.
NCERT point: ATP per CO2 = 3; NADPH per CO2 = 2.
What is wrong?
Thank you! We will check this question.
Practise Photosynthesis in Higher Plants
Take a free 15-question NEET Biology test on this chapter. Timed, scored instantly.
Start free test

Similar questions

The number of NADPH used to fix four molecules of CO2 in the Calvin cycle is Which compound is NOT an intermediate of the Calvin cycle? Which of the following is NOT required for the Calvin cycle?