In cytochromes, the heme group plays a key role in acquiring and transferring electrons with a(n) __________ transition. A) Mg⁰/Mg²⁺ B) S⁰/S^2- C) Cu⁺/Cu²⁺ D) Fe²⁺/Fe³⁺ E) none of the above

Question

Quizplus · Accepted Answer

The heme group in cytochromes contains an iron atom, which can switch between the Fe2+ and Fe3+ oxidation states during electron transfer. This involves a transition between the S1 and S0 states, as indicated by the Fe²⁺/Fe³⁺ option in choice D. The other choices involve different metals or oxidation states that are not relevant to the function of cytochromes.

In Cytochromes, the Heme Group Plays a Key Role in Acquiring