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

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.

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.