Why some living organisms have to perform anaerobic respiration
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Although virtually all eukaryotic organisms perform aerobic respiration usingmitochondria, some eukaryotic cells are facultative anaerobes capable of surviving without oxygen when necessary. Humans and other animals are obligate aerobes, requiring oxygen for survival.
Some obligate anaerobes use fermentation, while others use anaerobic respiration. Aerotolerant organisms are strictly fermentative. In the presence ofoxygen, facultative anaerobes use aerobic respiration; without oxygen, some of them ferment; some use anaerobic respiration.
In contrast, some living systems use an inorganic molecule as a final electron acceptor. Both methods are called anaerobic cellular respiration, where organisms convert energy for their use in the absence of oxygen. Certain prokaryotes, including some species of bacteria and archaea, use anaerobic respiration.
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anaerobic respiration takes place in the absence of oxygen..some low leveled organisms like yeast cells perform anaerobic respiration because yeast is an organism which can live without the oxygen of air because it obtains energy by the process of anaerobic respiration. Yeast can survive in the absence of oxygen.
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