How many molecules of ATP and NADPH are required for every molecule of CO2 fixed in the Calvin cycle?
2 molecules of ATP and 2 molecules of NADPH
3 molecules of ATP and 3 molecules of NADPH
3 molecules of ATP and 2 molecules of NADPH
2 molecules of ATP and 3 molecules of NADPH
for every molecule of CO2 entering the Calvin cycle, a total of 3 molecules of ATP and 2 molecules of NADPH are required. Specifically, 2 molecules of ATP are utilised for phosphorylation and 2 of NADPH for reduction during the fixation steps, while 1 molecule of ATP is required for the regeneration of the acceptor molecule RuBP [Sources 104, 106].
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