Question

which is the final electron acceptor in the electron transport chain of cellular respiration?
○ nadh
○ fadh₂
○ oxygen
○ carbon dioxide

Explanation:

In the electron transport chain of cellular respiration, electrons are passed through a series of carriers. The final electron acceptor is oxygen. NADH and FADH₂ are electron donors (they carry electrons to the chain), and carbon dioxide is a product of other stages (like the citric acid cycle) and not an electron acceptor here.

Answer:

oxygen (the option with "oxygen" as the text)