Generation of proton gradients across membranes occurs during which of the following reactions?
A)photosynthesis only
B)cellular respiration only
C)both photosynthesis and cellular respiration
D)photosynthesis,cellular respiration,and alcohol fermentation in yeast

Question

Quizplus · Accepted Answer

Proton gradients are generated during both photosynthesis and cellular respiration as a result of electron transport chain reactions. In photosynthesis, the proton gradient is generated across the thylakoid membrane of chloroplasts. In cellular respiration, the proton gradient is generated across the inner mitochondrial membrane. Alcohol fermentation does not involve electron transport chain reactions and therefore does not generate a proton gradient.

Generation of Proton Gradients Across Membranes Occurs During Which of the Following