Here's why:
* The Calvin Cycle uses NADPH and ATP: The Calvin cycle is the light-independent stage of photosynthesis, where carbon dioxide is converted into glucose. It requires the energy carriers NADPH and ATP, which are produced in the light-dependent reactions.
* Light-dependent reactions produce NADPH and ATP: The light-dependent reactions of photosynthesis occur within the thylakoid membranes of chloroplasts. They use light energy to create NADPH and ATP.
Think of it like this:
* Light-dependent reactions: Like a power plant, generating the energy carriers (NADPH and ATP).
* Calvin cycle: Like a factory, using the energy carriers to produce sugar (glucose).
Let me know if you have any other questions!
