Question

which of the following is true about the calvin cycle?
rubisco fixes o₂ to a carbohydrate molecule.
both atp and nadph are needed to make sugars.
light energy is converted to chemical energy.

Explanation:

• Rubisco fixes \(CO_2\) (not \(O_2\)) to a carbohydrate molecule (RuBP - ribulose bisphosphate) in the Calvin cycle.
• The Calvin cycle is a light - independent reaction. Light energy is converted to chemical energy (in the form of ATP and NADPH) in the light - dependent reactions, and these ATP and NADPH are then used in the Calvin cycle to make sugars.

Answer:

Both ATP and NADPH are needed to make sugars.