Select the set of correct statements regarding ETS in aerobic respiration.
A. $F_1$ catalyses the synthesis of ATP from ADP.
B. Protons are channeled from outer chamber of mitochondria into inner chamber by $F_0$ part of oxysome.
C. Cytochrome C acts as mobile electron carrier transferring electrons from Complex V and IV.
D. Cytochrome C is a small, calcium containing protein tightly associated with inner membrane.
E. Cytochrome C acts as mobile electron carrier transferring electrons from complex III to IV.
Select the correct option

Statement A is correct. The $F_1$ headpiece of ATP synthase contains the catalytic site for the synthesis of ATP from ADP and inorganic phosphate.

Statement B is correct. The $F_0$ part of the oxysome (ATP synthase) forms a transmembrane channel that facilitates the diffusion of protons from the intermembrane space (outer chamber) to the mitochondrial matrix (inner chamber).

Statement C is incorrect. Cytochrome c transfers electrons between Complex III (Cytochrome $bc_1$ complex) and Complex IV (Cytochrome c oxidase), not Complex V.

Statement D is incorrect. Cytochrome c is a small protein attached loosely to the outer surface of the inner mitochondrial membrane, and it contains iron (in its heme group), not calcium.

Statement E is correct. Cytochrome c acts as a mobile electron carrier transferring electrons from Complex III to Complex IV.

Therefore, statements A, B, and E are correct.

Answer: A, B and E only