PSI (P700) primarily
- A
Synthesizes glucose from CO₂ in the stroma, using ATP and NADPH from the cytochrome b6f complex
- Bcheck_circle
Re-energizes electrons that have passed through the cytochrome complex, ultimately reducing NADP⁺ to NADPH
- C
Splits water in the thylakoid lumen, releasing electrons that ultimately reduce plastoquinone to plastoquinol
- D
Pumps protons across the thylakoid membrane to generate the gradient that drives ATP synthase activity
Explanation
Light absorbed by PSI raises electron energy enough to reduce NADP⁺ via ferredoxin and FNR.