Question

Match the following:

Column I	Column I
A. Complex I	I. Cytochrome c oxidase
B. Complex II	II. Cytochrome bc1 complex
C. Complex III	III. NADH dehydrogenase
D. Complex IV	IV. FADH2

• A. A-III, B-IV, C-II, D-I
• B. A-III, B-II, C-I, D-IV
• C. A-II, B-IV, C-III, D-I
• D. A-II, B-III, C-I, D-IV

Answer 1

The correct option is A A-III, B-IV, C-II, D-I

The electron transport chain and oxidative phosphorylation during respiration involves five complexes. They are:
(a) Complex I: It involves NADH dehydrogenase
(b) Complex II: It constitutes FADH2
(c) Complex III: Cytochrome bc1 complex forms complex III.
(d) Complex IV: It refers to cytochrome c oxidase complex containing cytochrome a and a3 and two copper centres.
(e) Complex V: It is the ATP synthase involved in oxidative phosphorylation.