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Unformatted text preview: final electron acceptor is an oxygen atom. In their energy-depleted condition, the electrons unite with an oxygen atom. The electronoxygen combination then reacts with two hydrogen ions (protons) to form a water molecule (H 2 O) The role of oxygen in cellular respiration is substantial. As a final electron receptor, it is responsible for removing electrons from the system. If oxygen were not available, electrons could not be passed among the coenzymes, the energy in electrons could not be released, the proton pump could not be established, and ATP could not be produced. In humans, breathing is the essential process that brings oxygen into the body for delivery to the cells to participate in cellular respiration....
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- Fall '07