Which of the following statements is true regarding the effect of electron transport chain length on energy production?
A. Bacterial and archaeal electron transport chains are the same as eukaryotic chains, so the same amount of energy is produced from the resulting proton motive force, regardless of the organism.
B. The longer the electron transport chain, the less energy is stored in the proton motive force, since energy must be expended when passing electrons down the chain.
C. As electrons are passed from carrier to carrier, each oxidation releases enough energy to actively transport protons across a membrane, thus, the more carriers, the greater the proton motive force produced.
D. The length of the electron transport chain does not play a role in the magnitude of the proton motive force produced.
Answer: C
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