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How many ATP molecules are needed by the Calvin cycle to make two molecules of glucose?

(a) 18 Your answer
(b) 24 Your answer
(c) 36 Correct
(d) 54 Your answer

Your answer: Correct answer: (c)

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Explanation

Why (c) is correct

One glucose needs 18 ATP, so two glucose need 36 ATP.

Why the other options are wrong

(a) · your answer 18 ATP is for one glucose.
(b) · your answer 24 ATP is too few.
(d) · your answer 54 ATP is for three glucose.

NCERT point: ATP per glucose = 18.

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