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What is carbon fixation, and how does it relate to photosynthesis?

A. It is the absorption of CO₂ from the air, and it occurs during the light-dependent reactions.

B. It is the reduction of CO₂, and it occurs during the Calvin cycle.

C. It is the conversion of CO₂ into organic compounds, and it forms 3-PGA.

D. It is the production of CO₂ during regeneration, and it forms RuBP.

Answer :

Final answer:

Carbon fixation is the conversion of CO2 into organic compounds during photosynthesis.


Explanation:

Carbon fixation is the conversion of CO2 into organic compounds, and it occurs during the Calvin cycle of photosynthesis. In this process, the enzyme Rubisco catalyzes the fixation of CO2 by combining it with a five-carbon molecule called RuBP. This forms an unstable six-carbon molecule, which quickly breaks down into two molecules of a three-carbon compound called 3-phosphoglycerate (3-PGA).


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