Anaerobic respiration

The enzymatic release of energy from inorganic and organic compounds (especially carbohydrates and fats) which uses compounds other than oxygen (e.g. nitrate, sulfate) as the terminal electron acceptor.

organism that makes ATP by aerobic respiration if oxygen is present. They carryout aerobic respiration when oxygen is available but switch to anaerobic catabolism (e.g. alcoholic fermentation) when deprived of oxygen.