Which of the following most accurately describes what is happening along the electron transport chain in the accompanying figure?
A) Electrons are transferred to ADP to generate ATP at each step in the process.
B) Each electron carrier alternates between being reduced and being oxidized.
C) ATP is generated at each step of the process.
D) Energy of the electrons increases at each step of the process.
E) Molecules in the chain give up some of their potential energy.
Answer: B
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