Here's a breakdown:
* Light-dependent reactions occur in the thylakoid membranes of chloroplasts and use light energy to:
* Split water molecules (photolysis), releasing electrons, protons (H+), and oxygen.
* Generate ATP through photophosphorylation, which uses the energy from light to pump protons across the thylakoid membrane, creating a concentration gradient that drives ATP synthase.
* Reduce NADP+ to NADPH using the electrons released from water.
* Light-independent reactions (Calvin cycle) occur in the stroma of chloroplasts and use the energy from ATP and NADPH produced in the light-dependent reactions to:
* Fix carbon dioxide from the atmosphere into organic molecules.
* Convert carbon dioxide into glucose using the reducing power of NADPH and the energy from ATP.
Therefore, the light-independent reactions rely on the energy stored in ATP and NADPH, which are the products of the light-dependent reactions.
