alleryStart learning →How many extra molecules of adenosine triphosphate are used in the regeneration reactions?
AOne extra molecule
BTwo extra molecules
CThree extra molecules
DSix extra molecules
Answer & Solution
Correct answer: C. Three extra molecules
1. The third stage of the cycle rebuilds the five-carbon acceptor from five three-carbon molecules.
2. Three more molecules of adenosine triphosphate are used in these regeneration reactions.
3. That is on top of the six spent during the reduction stage.
4. No further NADPH is named as being spent in this third stage.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 8 "Photosynthesis", section 8.3 Using Light Energy to Make Organic Molecules_
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