If a C3 plant is provided with CO2 containing 14C, which molecule would show radioactivity first?
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Correct answer: 3-phosphoglycerate
As 3-phosphoglycerate (3-PGA) is the very first stable product formed after CO2 fixation in C3 plants, it would be the first molecule to incorporate the radioactive 14C.
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More Dark Reactions: Calvin Cycle and C3 Pathway questions
- In the C3 pathway, the conversion of 3-phosphoglyceric acid to 1,3-bisphosphoglyceric acid involves:
- Which of the following is the primary CO2 acceptor molecule in the C3 pathway (Calvin Cycle)?
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- The Calvin cycle proceeds in three distinct stages. What is the correct chronological order of these stages?
- How many molecules of ATP and NADPH are required for every molecule of CO2 fixed during the reduction step of the Calvin cycle?
- To produce one molecule of glucose, how many 'turns' of the Calvin cycle are required?