Question

which of the answer choices is a required input to both the reduction step and the regeneration step of the calvin cycle?
o rubisco
o nadph
o o₂
o atp
o co₂

Explanation:

In the Calvin - cycle, ATP is used in both the reduction step (to convert 3 - phosphoglycerate to glyceraldehyde - 3 - phosphate) and the regeneration step (to convert glyceraldehyde - 3 - phosphate back to ribulose - 1,5 - bisphosphate). Rubisco is mainly involved in the carbon - fixation step. NADPH is mainly used in the reduction step. O₂ is not a key input for these steps. CO₂ is the input for the carbon - fixation step.

Answer:

ATP