Which of the following statements best represents the relationships between the light reactions and the Calvin cycle? A)The light reactions provide ATP and NADPH to the Calvin cycle,and the Calvin cycle returns ADP,℗_i,and NADP⁺ to the light reactions. B)The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin cycle,and the Calvin cycle provides water and electrons to the light reactions. C)The light reactions supply the Calvin cycle with CO₂ to produce sugars,and the Calvin cycle supplies the light reactions with sugars to produce ATP. D)The light reactions provide the Calvin cycle with oxygen for carbon fixation,and the Calvin cycle provides the light reactions with sugars to produce ATP.

Question

Quizplus · Accepted Answer

The light reactions provide ATP and NADPH to the Calvin cycle, which uses them to fix carbon dioxide into sugars. In exchange, the Calvin cycle returns ADP, Pi, and NADP+ to the light reactions to be used again. This exchange of energy and electron carriers forms a functional relationship between the two processes.

Which of the Following Statements Best Represents the Relationships Between