객관식
Which of the following substances is the primary fuel for muscles and other cells during cellular respiration?
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8. Respiration
Introduction to Aerobic Cellular Respiration
객관식
During cellular respiration, which molecule acts as the final electron acceptor in the electron transport chain?
A
NADH
B
Glucose (\(C_6H_{12}O_6\))
C
Oxygen (\(O_2\))
D
Carbon dioxide (\(CO_2\))
검증된 단계별 안내1
Understand the concept of the electron transport chain: It is the final stage of cellular respiration, where electrons are transferred through a series of protein complexes embedded in the inner mitochondrial membrane.
Recognize the role of electron carriers: NADH and FADH₂ donate electrons to the electron transport chain, which are passed along the chain to generate a proton gradient.
Identify the final electron acceptor: At the end of the electron transport chain, the electrons must be accepted by a molecule to prevent a backup in the chain. This molecule is oxygen (\(O_2\)).
Explain why oxygen (\(O_2\)) is the final electron acceptor: Oxygen combines with electrons and protons to form water (\(H_2O\)), which is a crucial step in maintaining the flow of electrons and ensuring the continuation of ATP production.
Clarify why other options are incorrect: NADH and glucose (\(C_6H_{12}O_6\)) are electron donors, not acceptors. Carbon dioxide (\(CO_2\)) is a byproduct of cellular respiration, not involved in the electron transport chain as an acceptor.
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