Q.

Which one of following is complex V of the ETS of inner mitochondrial membrane
 a) NADH Dehydrogenase        b)    Cytochrome oxidase
 c) Ubiquinone                          d)    ATP synthase

1 A
2 B
3 C
4 D

Ans.

(d) The complex V of ETS of mitochondrial membrane is ATP synthase, which has a head piece, stalk and a base piece. Out of these, the head piece is identified as the coupling factor 1(F1), stalk portion is necessary for binding i to inner mitochondrial membrane and base piece is isolated as F_0 and present within the inner mitochondrial membrane.