In animal cells the mitochondrial electron transport chain is responsible for reoxidizing most of the nadh produced by oxidative pathways regardless of the cellular compartment in which it was produced. in animal cells the mitochondrial electron transport chain is responsible for reoxidizing most of the nadh produced by oxidative pathways regardless of the cellular compartment in which it was produced. a. true b. false

The answer is TRUE. Oxidative phosphorylation is usually a redox reaction in which energy is released and used to form ATP from ADP and Pi. Oxygen is the main electron acceptor.  In eukaryotes, these redox reactions are carried out by a series of protein complexes (electron transport chain) within the inner membrane of the cell's mitochondria. NADH dehydrogenase or complex I is the first protein in the electron transport chain. The reaction that is catalyzed by this enzyme is the two electron oxidation of NADH by coenzyme Q10 or ubiquinone.