Answer:
Complex V
Explanation:
In the mitochondria of normal cells, the ATP synthase, also referred to as Complex V of the electron transport chain, synthesizes ATP from ADP and phosphate by using a proton gradient. The electrons transferred by the complexes I, III, and IV extrude protons to the intermembrane region, thereby generating a proton electrochemical gradient that is used by this Complex (V) when protons pass back across the inner membrane to the matrix space. The complex V is composed of two major functional domains named F0 and F1.
