Assertion: respiration | /r/ObjectUse | used as final electron acceptor
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Source sentences:
text: Respiration is always a process where an electron transport chain is involved and an inorganic molecule (oxygen is most common but sulfate or nitrate works too, when the two later are used it is anaerobic respiration) is used as the final electron acceptor while fermentation lacks an electron transport chain and uses an organic electron acceptor.