Which one of the following molecules of respiratory chain is found at the lowest energy level?

Explanation

Cytochrome a3, also known as cytochrome c oxidase or Complex IV, is a crucial enzyme in the electron transport chain of cellular respiration. This enzyme plays a central role in the process of oxidative phosphorylation, where electrons are transferred through a series of protein complexes, ultimately leading to the production of adenosine triphosphate (ATP), the cell's primary energy currency.