Question

What molecule is the source of the protons that are used to establish the proton gradient?.

Answer 1

Answer: However, at photo system II the energy derived from absorption of photons is used to split water molecules to molecular oxygen and protons (see Figure 10.22). This reaction takes place within the thylakoid lumen, so the release of protons from H2O establishes a proton gradient across the thylakoid membrane.

Explanation: ;3