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Example Questions
Example Question #5 :Photosynthesis
What happens during stage 1 of the Calvin cycle?
Possible Answers:
ATP reacts with ribulose 5-phosphate to become ribulose 1,5-bisphosphate
Carbon dioxide and ribulose 1,5-bisphosphate react to form 3-phosphoglycerate
NADPH and 1,3 bisphosphoglycerate react to form glyceraldehyde-3-phosphate
Fructose-6-phosphate becomes ribulose 5-phosphate
2 ATP molecules react with 3-phosphoglycerate to form 1,3-bisphosphoglycerate
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 - isand ribulose 1,5-bisphosphate reacting to form 3-phosphoglycerate.
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