Question

question 10 of 20 :
select the best answer for the question.

1. whats the primary function of oxygen in aerobic respiration?

○ a. to donate electrons to all other particles within cellular respiration
○ b. to give short bursts of energy to muscle cells
○ c. to act as a receptor for carbon dioxide molecules
○ d. to accept electrons, improving the efficiency of chemical reactions
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Explanation:

• Option A: Oxygen does not donate electrons in aerobic respiration; it is the final electron acceptor, so A is incorrect.
• Option B: Short bursts of energy to muscle cells are related to anaerobic processes (like lactic acid fermentation) or phosphocreatine systems, not oxygen's role in aerobic respiration, so B is incorrect.
• Option C: Oxygen does not act as a receptor for carbon dioxide. Carbon dioxide is a waste product of respiration, and oxygen's role is different, so C is incorrect.
• Option D: In aerobic respiration, oxygen acts as the final electron acceptor in the electron transport chain. By accepting electrons (along with protons to form water), it allows the electron transport chain to continue efficiently, which is crucial for maximizing ATP production. So D correctly describes oxygen's primary function.

Answer:

D. To accept electrons, improving the efficiency of chemical reactions