In green plant photosynthesis, how many protons are transferred into the thylakoid lumen after absorption of four photons to PSII and four photons to PSI?
A) 2
B) 4
C) 8
D) 12
E) 18

Question

Quizplus · Accepted Answer

For every four photons absorbed by both PSII and PSI, a total of 12 protons are transferred into the thylakoid lumen. This includes the splitting of two water molecules (producing 4 protons), and the transport of 8 additional protons by the cytochrome b6f complex as part of the Q cycle.

In Green Plant Photosynthesis, How Many Protons Are Transferred into the Thylakoid