Which of the component of respiratory chain reacts directly with molecular oxygen:: (A) Cyt b, (B) CoQ, (C) Cyt C, (D) Cyt aa3
Answer is D. Cyt aa3 is complex IV of ETC, which directly reacts with oxygen. ETC Complex Components Complex I FMN + Fe-S Complex Complex II FAD + Fe - S Complex Complex III Cyt b, Fe-S Complex Complex IV Cyt aa3, Cu