Photosynthesis - Light Reactions

[skyisblue]

Let me know if the following makes sense:

Light is absorbed by chlorophyll and H2O is split b/c light energy drives a transfer of 2e's and 1 H+ from H2O to NADP+ reducing it to NADPH. This is with the help of enzymes of course and O2 is given off in the process when H2O is oxidized or split.

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[DailyDrivenTJ]

Remember the light reaction takes in two different photosystems. If I remember correctly, H2O is split in PII and in PI reduces the NADP+. In between ATP is generated via cyclic and non-cyclic pathways.