The biological process of cellular respiration versus that of fermentation: Cellular respiration is anaerobic, oxidative, with an inorganic compound serving as the final acceptor electrons or is anaerobic with an organic serving instead as a final electron acceptor. Fermentation involves reduction but uses an inorganic compound as the final acceptor of electrons. Cellular respiration is aerobic, biosynthetic, with an organic compound functioning as the final acceptor of electrons or is anaerobic with an inorganic ion serving instead as a final election acceptor. Fermentation also involves reduction but employs an inorganic compound as the final acceptor of electrons. Cellular respiration is aerobic, oxidative, with molecular oxygen functioning as the final acceptor of electrons or is anaerobic with an inorganic ion serving instead as a final electron acceptor. Fermentation also involves oxidation but employs an organic compound as the final acceptor of electrons Cellular respiration is aerobic, bio reductive, with molecular oxygen functioning as the final acceptor electrons, or is microaerophilic with an organic agent serving instead as a final electron acceptor. Fermentation also involves oxidation to molecular oxygen but employs an organic compound as the final acceptor of electrons.