Oligomycin
Yes, ATP synthase is a protein.
ATP synthase catalyzes the addition of a phosphate group to an ADP molecule. ADP + ATP synthase + P --> ATP + ATP synthase (ATP synthase on both sides of the equation indicates that, as an enzyme, it is not used up in the reaction.)
Yes, ATP synthase is an integral protein.
Yes, ATP synthase is an enzyme that plays a key role in the production of ATP in cells.
Rotenone
The catalytic knobs of ATP synthase would be located on the stromal side of the membrane. Protons travel through ATP synthase from the thylakoid space to the stroma.
Citrate synthase is inhibited by ATP. Obviously, the Krebs cycle produces ATP. This is the first step and one of the major regulatory steps in the pathway. If the cell has plenty of ATP, then it wouldn't need to keep making it, thus the pathway needs to be shut off. ATP inhibits the enzyme to shut off the pathway. This is an example of feedback inhibition (you can also call it negative inhibition or even product inhibition). Feedback inhibition is when the products of a certain biochemical pathway inhibit earlier enzymes, shutting down the pathway.
ATP Synthase
At least 10 protons pass through ATP synthase in order to make a molecule of ATP.
Cyanide blocks cytochrome c oxidase in the mitochondria. This is a transmembrane protein that establishes a proton gradient used by ATP synthase to create ATP. This shuts down ATP production leading to a quick death if exposure is high enough.
Cyanide
Antimycin