AP BIOLOGY

Detailed explanation-1: -ATP synthase accepts one proton from the lumen space and releases a different proton into the stroma space to create the energy it needs to synthesize ATP. It must do this three times to synthesize one ATP. This transfer is powered by the proton gradient created by the other complexes in the photosynthetic ETC.

Detailed explanation-2: -The hydrogen ion gradient created by the electron transport chain is utilized by ATP synthase to create ATP from ADP and Pi. This is similar to the way ATP is synthesized in the mitochondria. ATP, NADPH, and molecular oxygen are the final, vital, products of photosynthesis.

Detailed explanation-3: -In the electron transport chain of photosynthesis, the ATP synthase complex accomplishes the phosphorylation of ADP to ATP, providing part of the energy for subsequent biosynthesis through the Calvin cycle.

Detailed explanation-4: -ATP is produced on the stromal side of the thylakoid membrane, so it is released into the stroma. The electron arrives at photosystem I and joins the P700 special pair of chlorophylls in the reaction center.