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Example Questions
Example Question #1 : Carbohydrate Metabolism
What happens during stage 1 of the Calvin cycle?
Possible Answers:
2 ATP molecules react with 3-phosphoglycerate to form 1,3-bisphosphoglycerate
NADPH and 1,3 bisphosphoglycerate react to form glyceraldehyde-3-phosphate
Carbon dioxide and ribulose 1,5-bisphosphate react to form 3-phosphoglycerate
Fructose-6-phosphate becomes ribulose 5-phosphate
ATP reacts with ribulose 5-phosphate to become ribulose 1,5-bisphosphate
Correct answer:
Carbon dioxide and ribulose 1,5-bisphosphate react to form 3-phosphoglycerate
Explanation:
All of the answer choices are steps in the Calvin cycle, but the only one that describes the first stage - fixation - is and ribulose 1,5-bisphosphate reacting to form 3-phosphoglycerate.
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