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Example Questions
Example Question #1 : Calvin Cycle
What happens during stage 1 of the Calvin cycle?
ATP reacts with ribulose 5-phosphate to become ribulose 1,5-bisphosphate
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
2 ATP molecules react with 3-phosphoglycerate to form 1,3-bisphosphoglycerate
Carbon dioxide and ribulose 1,5-bisphosphate react to form 3-phosphoglycerate
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.
Example Question #1 : Carbohydrate Metabolism
What are the three stages of the Calvin cycle?
Fixation, carboxylation, and regeneration
Reduction, oxidation, and regeneration
Fixation, oxidation, and regeneration
Carboxylation, reduction, and regeneration
Fixation, reduction, and regeneration
Fixation, reduction, and regeneration
The stages of the Calvin cycle in the order that they occur are fixation, reduction, and then regeneration. While carboxylation does occur as a part of the first stage, it is not what defines that stage.
Example Question #2 : Carbohydrate Metabolism
Which of the following is not true of the Calvin cycle?
NADPH and ATP are required to initiate the Calvin cycle
All of these are true of the Calvin cycle
The Calvin cycle does not need light to function
The Calvin cycle occurs in the stroma of a chloroplast
The first step of the Calvin cycle is carbon fixation
The Calvin cycle does not need light to function
Despite the Calvin cycle's other name (light independent reactions), light is indirectly required for this process to function. All other choices are true of the Calvin cycle.
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