Question

what happens during the carbon fixation stage of the calvin cycle (light - independent reactions)?
a. the enzyme rubisco attaches co₂ to rubp, causing the formation of molecules of 3 - phosphoglycerate.
b. energy from atp and electrons from nadph are used to reduce 3 - phosphoglycerate to form g3p molecules (which can be used to form other organic molecules such as glucose).
c. the remaining g3p molecules that have not exited the cycle are used to re - form rubp through a series of chemical reactions, so that the calvin cycle can continue.
d. oxygen is produced through this process.
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Explanation:

In the carbon - fixation stage of the Calvin Cycle, the enzyme Rubisco attaches CO₂ to RuBP, forming 3 - phosphoglycerate. Option B describes the reduction stage, option C is the regeneration stage, and oxygen is not produced in the Calvin Cycle.

Answer:

A. The enzyme Rubisco attaches CO₂ to RuBP, causing the formation of molecules of 3 - phosphoglycerate.