The schematic shows the linear (Z-scheme) electron flow in the thylakoid membrane.
What is the immediate source of electrons that re-fill PSII after they are excited by light?
- A
ATP hydrolysis in the stroma
- Bcheck_circle
Splitting of water (photolysis), which also releases O2
- C
NADPH oxidation
- D
CO2 fixation in the Calvin cycle
Explanation
PSII replaces electrons by photolyzing water, producing O2, protons, and electrons. These electrons enter PSII's reaction center.