During aerobic respiration, electrons from FADH₂ are transferred to oxygen via the electron transport system (ETS). Arrange the following components in the correct sequence of electron flow: I. Cytochrome c II. Ubiquinone III. Cytochrome a₃ IV. Cytochrome bc₁ complex

Step-by-step solution

During aerobic respiration, electrons from FADH₂ are transferred to Complex II (succinate dehydrogenase). From Complex II, electrons are passed to the mobile electron carrier Ubiquinone (II). Ubiquinone transfers the electrons to Complex III, which is the Cytochrome bc₁ complex (IV). Complex III then passes the electrons to another mobile carrier, Cytochrome c (I). Cytochrome c transfers the electrons to Complex IV (cytochrome c oxidase), which contains Cytochrome a and Cytochrome a₃ (III). Finally, Cytochrome a₃ t