21. Which of the following is correct concerning the mitochondrial ATP synthase?
(A) It can synthesize ATP after it is extracted from broken mitochondria
(B) It catalyzes the formation of ATP even though the reaction has a large positive G'°
(C) It consists of F0 and F1 subunits, which are transmembrane (integral) polypeptides
(D) It is actually an ATPase and only catalyzes the hydrolysis of ATP
(E) When it catalyzes the ATP synthesis reaction, the G'° is actually close to zero