What molecule is the final acceptor of electrons and hydrogen ions during aerobic respiration?

• A. $\mathrm{ATP}$
• B. $\mathrm{NADH}$
• C. ${\mathrm{CO}}_2$
• D. $O2$

Answer: (D)

Verified step by step guidance

1. Understand the process of aerobic respiration: Aerobic respiration is a metabolic pathway that uses oxygen to convert glucose into energy, carbon dioxide, and water.
2. Identify the role of oxygen in aerobic respiration: Oxygen acts as the final electron acceptor in the electron transport chain, a series of reactions that occur in the mitochondria.
3. Explore the electron transport chain: Electrons are transferred through a series of protein complexes and coenzymes, ultimately reaching oxygen.
4. Recognize the importance of oxygen: Oxygen combines with electrons and hydrogen ions to form water, completing the process of energy production.
5. Conclude the role of oxygen: Oxygen is essential for the efficient production of ATP, the energy currency of the cell, by accepting electrons and hydrogen ions.