The cytochrome b_6 6
​
start subscript, 6, end subscriptf complex is an integral thylakoid membrane protein that forms an electrochemical gradient by pumping protons. In an experiment, researchers apply a toxin to a plant cell that inhibits the cytochrome b_6
6
​
start subscript, 6, end subscriptf complex.
Which of the following explains the most likely effect of this toxin on the light reactions of photosynthesis?
Choose 1
Choose 1

(Choice A)
A
Hydrogen ions will move across the thylakoid membrane using simple diffusion.

(Choice B)
B
ATP synthesis will not occur.

(Choice C)
C
NADP^{+}
+
start superscript, plus, end superscript will not be reduced to NADPH.

(Choice D)
D
Carbohydrates will not be produced in the stroma.