AP Biology· difficulty 3/5
The O₂ released by photosynthesis comes from
Splitting H₂O at PSII
Reducing NADP⁺ at PSII
Splitting CO₂ at PSI
Oxidizing glucose at PSI
Explanation
The oxygen-evolving complex of PSII splits water; CO₂ atoms end up in glucose, not O₂.
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