When photosynthesis is fully operational under conditions of intense light, the pH of the thylakoid lumen may be as much as three full pH units lower than the pH of the stroma of the chloroplast. That means that there are _____ protons in the thylakoid compared to the stroma.
A)1000 times more
B)100 times more
C)3 times more
D)3 times fewer

Question

Quizplus · Accepted Answer

A pH difference of three units corresponds to a ten-fold difference in proton concentration. Therefore, the thylakoid lumen would have 1000 times more protons than the stroma.

When Photosynthesis Is Fully Operational Under Conditions of Intense Light