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Question

How many molecules of ATP are required during the formation of one molecule of glucose?

A
8
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B
18
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C
28
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D
2
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Solution

The correct option is B 18
A) 18 molecules of ATP are required.
B) 3 ATPs are consumed for every carbon dioxide molecule fixed in the C3 cycle. Glucose is a 6 carbon compound. So, 6 x 3 = 18 ATP.
C) 18 molecules of ATP are required during the formation of one molecule of glucose.
D) 2 ATP is sufficient to fix only one carbon dioxide molecule in the C4 cycle.
So the correct answer is '18'.

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