In chloroplasts, a proton gradient is established with a higher concentration of protons found in the ______ and a lower concentration in the ______.
A)thylakoid lumen, intermembrane space
B)intermembrane space, thylakoid lumen
C)thylakoid lumen, stroma
D)stroma, thylakoid lumen
E)intermembrane space, matrix

Question

Quizplus · Accepted Answer

In chloroplasts, the thylakoid lumen is the site of proton accumulation due to the electron transport chain in photosynthesis. As protons are pumped into the lumen, a high concentration is established there. In contrast, the stroma has a lower concentration of protons. Therefore, the correct answer is C) thylakoid lumen, stroma.

In Chloroplasts, a Proton Gradient Is Established with a Higher