alleryIn the Z-scheme of photosynthesis, electrons flow:
AFrom PSI to water (downhill)
BFrom NADPH to PSII
CJust within PSI only
DFrom water → PSII → PSI → NADPH
Answer & Solution
Correct answer: D. From water → PSII → PSI → NADPH
NON-CYCLIC e⁻ flow (Z-scheme): water
→ PSII (P680) → ETC → PSI (P700) → NADPH.
Generates ATP + NADPH + O2. CYCLIC flow uses only PSI, generates ATP only.
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