The document describes the light reaction of photosynthesis where chloroplasts use chlorophyll and photosystems I and II to split water molecules, releasing oxygen and energizing electrons. These energized electrons are passed through an electron transport chain and ATP synthase to produce ATP, with the electrons eventually being accepted by NADP to form NADPH, providing energy for the dark reaction of photosynthesis.

1. The Light Reaction of Photosynthesis Animation and Narration of

2. Chloroplast Chlorophyll

3. Photosystem II Chlorophyll

4. H 2 O Photosystem II 2 Hydrogen Oxygen

5. H H O 2 Photosystem II

6. H H Photosystem II Low Energy High Energy

7. Photosystem II Electron Transport Chain Redox Reactions Low Energy High Energy

8. ADP-P Photosystem II ATP

9. Low Energy High Energy

10. Photosystem I Chlorophyll 2

11. Photosystem I ATP H NADP NADPH DARK REACTION ATP NADPH