Which of the component of respiratory chain reacts directly with molecular oxygen:
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
Cyt b
CoQ
Cyt C
Cyt aa3
ETC