Question

What role does $O_2$ play in aerobic respiration?

• A. it combines with acetyl-CoA at the start of the Krebs cycle
• B. it is given off as a by-product during the oxidation of pyruvate
• C. it combines with $H_{2}O$ to help drive the formation of ATP
• D. it is the final electron acceptor at the end of the electron transport chain

Answer 1

The correct option is D it is the final electron acceptor at the end of the electron transport chain

Oxygen is the final electron acceptor at the end of the electron transport chain.