Question

Which of the following stages of cellular respiration involve cytochromes?

I. glycolysis
II. Krebs cycle
III. electron transport chain

A. III only
B. II and III only
C. I only
D. I, II, and III
E. II only

Answer 1

Answer:

A. III only

Explanation:

Cytochromes are found only in the mitochondrial membrane as part of the electron transport chain. They are vital to the downward cascade of energy as electrons are passed from the NAD+ and FAD produced during glycolysis and the Krebs cycle into the electron transport chain to eventually produce ATP.