Question: The last electron acceptor of the electron transport chain (etc) in cellular respiration is?
Disambiguated questions and answers: question: The last electron acceptor of the electron transport chain (etc) in aerobic cellular respiration is?
The last electron acceptor of the electron transport chain (etc) in anaerobic cellular respiration is?
answer: molecular oxygen
O2
oxygen
electron acceptors other than molecular oxygen
Natural Questions answer: molecular oxygen (from the Wikipedia article "Electron transport chain")