Answer:
I believe it is Adenosine 5'-triphosphate
Explanation:
I believe the corre term to fill in the blank is "a protein gradient." Chemiosmosis uses a protein gradient to supply the energy necessary to phosphorylate adp to atp. It<span> is the diffusion of hydrogen ions (protons) across the biological membrane via the ATP synthase.</span>
The top layer carry out photosynthesis