see redox moleculeRedox is the abbreviated term for reduction-oxidation. Coenzyme Q10 molecules are redox molecules. Redox refers to the oxidation state of the molecule. Oxidized Coenzyme Q10 molecules, called ubiquinone (CoQ10), are Coenzyme Q10 molecules that can accept (take on) two electrons and thus become reduced Coenzyme Q10 molecules called ubiquinol. Reduced Coenzyme Q10 molecules, called ubiquinol (CoQH2), are Coenzyme Q10 molecules... More.