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MDCAT Biology QUESTION #11247
Question 1
The final electron acceptor in the electron transport chain during aerobic respiration is:
  • NAD$^+$
  • FAD
  • O$_2$✔️
  • CO$_2$
Correct Answer Explanation
Molecular oxygen (O$_2$) is the final electron acceptor in the electron transport chain. It combines with electrons and protons to form water. Without oxygen, the ETC cannot function, and aerobic respiration ceases.