What is a cytochrome?
A) a protein that transfers electrons and that also contains a heme prosthetic group
B) a chloroplast protein that transfers electrons and that also contains an iron-sulfur prosthetic group
C) a protein that pumps ATP and that also contains iron
D) All of the above.
E) None of the above.

Question

Quizplus · Accepted Answer

A cytochrome is a protein that transfers electrons and also contains a heme prosthetic group. Chloroplast proteins containing iron-sulfur prosthetic groups are not typically referred to as cytochromes. Similarly, cytochromes do not pump ATP, although they may play a role in electron transfer during ATP synthesis. Therefore, choices B and C are incorrect.

What Is a Cytochrome