The Light Reactions of Photosynthesis Supply the Calvin Cycle With

Question

The light reactions of photosynthesis supply the Calvin cycle with
A)light energy.
B)CO₂ and ATP.
C)H₂O and NADPH.
D)ATP and NADPH.
E)sugar and O₂.

Accepted Answer

The light reactions of photosynthesis provide the Calvin cycle with ATP and NADPH, which are used as energy and reducing power to drive the fixation of carbon dioxide into organic molecules. CO₂ is also required for the Calvin cycle, but it is not supplied by the light reactions. Water and oxygen are not directly involved in the Calvin cycle, although water is used as an electron donor in the light reactions and oxygen is produced as a byproduct. Sugar and oxygen are the overall products of photosynthesis, but they are not supplied to the Calvin cycle by the light reactions.