Hydrogen

Which one of the following best describes the electron transport chain?

a.Electrons are pumped across a membrane by active transport.
b.Acetyl-CoA is fully oxidized to CO2.
c.Hydrogens are added to CO2 to make an energy-rich compound.
d.Electrons pass from one carrier to another, releasing a little energy at each step.
e.Glucose is broken down to a three-carbon compound in preparation for the Citric Acid cycle.

D.

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