The following statements describe events occurring during photosynthesis:
1 - Scottish Highers Biology - Question 18 - 2022
Question 18
The following statements describe events occurring during photosynthesis:
1. Carbon dioxide combines with RuBP.
2. ATP synthase generates ATP from ADP and Pi.
3. Hyd... show full transcript
Worked Solution & Example Answer:The following statements describe events occurring during photosynthesis:
1 - Scottish Highers Biology - Question 18 - 2022
Step 1
1. Carbon dioxide combines with RuBP.
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Answer
This statement is correct as this reaction initiates the Calvin cycle in carbon fixation, where carbon dioxide is fixed to form 3-phosphoglycerate (3PG).
Step 2
2. ATP synthase generates ATP from ADP and Pi.
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Answer
This statement is not relevant to carbon fixation. ATP synthase operates during the light-dependent reactions to produce ATP, which is used in the Calvin cycle but is not a direct event of carbon fixation.
Step 3
3. Hydrogen binds with the coenzyme NADP.
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Answer
This statement refers to the reduction phase of the light reactions, where NADP is reduced to NADPH. While NADPH is utilized in the Calvin cycle, this event does not occur during the carbon fixation process itself.
Step 4
4. 3PG is phosphorylated by ATP.
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Answer
This statement is correct as it reflects the subsequent step in the Calvin cycle where 3-phosphoglycerate (3PG) is phosphorylated to create 1,3-bisphosphoglycerate, a crucial step in carbon fixation.
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