Question

Suppose the interior of the thylakoids of isolated chloroplasts were made acidic and then transferred in the dark to a pH 8 solution. What would be likely to happen? A. Cyclic photophosphorylation will occur. B. The isolated chloroplasts will generate oxygen gas. C. The isolated chloroplasts will make ATP. D. The Calvin cycle will be activated. E. The isolated chloroplasts will reduce NADP+ to NADPH

Answer 1

C. The isolated chloroplasts will make ATP.

When the interior of the thylakoids becomes acidic due to the light-dependent reactions in photosynthesis and is then transferred to a higher pH solution (pH 8) in the dark, ATP synthesis through chemiosmotic phosphorylation is likely to occur. This process allows ATP to be generated using the proton gradient established during the light-dependent reactions.