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Multiple Choice
In cellular respiration, which molecule is the final electron acceptor in the electron transport chain?
A
Oxygen
B
Glucose
C
Carbon dioxide
D
NADH
Verified step by step guidance
1
Understand the process of cellular respiration, which is a series of metabolic reactions that convert biochemical energy from nutrients into ATP, and then release waste products.
Recognize that the electron transport chain is the final stage of cellular respiration, occurring in the inner mitochondrial membrane, where electrons are transferred through a series of protein complexes.
Identify the role of electron carriers such as NADH and FADH2, which donate electrons to the electron transport chain, facilitating the movement of electrons through the complexes.
Learn that as electrons move through the electron transport chain, they lose energy, which is used to pump protons across the mitochondrial membrane, creating a proton gradient that drives ATP synthesis.
Understand that oxygen is the final electron acceptor in the electron transport chain, combining with electrons and protons to form water, thus completing the process of cellular respiration.