Smaller electrochemical gradients are generated from these electron transfer systems, so less ATP is formed through anaerobic respiration. ![]() However, anaerobic respirers use altered ETS carriers encoded by their genomes, including distinct complexes for electron transfer to their final electron acceptors. Microbes using anaerobic respiration commonly have an intact Krebs cycle, so these organisms can access the energy of the NADH and FADH 2 molecules formed. coli, switch to using nitrate as a final electron acceptor and producing nitrite when oxygen levels have been depleted. Many aerobically respiring bacteria, including E. Denitrifiers are important soil bacteria that use nitrate ( NO 3 – ) ( NO 3 – ) and nitrite ( NO 2 – ) ( NO 2 – ) as final electron acceptors, producing nitrogen gas (N 2). There are many types of anaerobic respiration found in bacteria and archaea. One possible alternative to aerobic respiration is anaerobic respiration, using an inorganic molecule other than oxygen as a final electron acceptor.
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