Multiple choice Cabon monoxide inhibits mitochondrial electron transport by inhibiting the electron transfer of complex I blocking electron transport at the level of the cytochrome b-cytochrome c, complex binding to the oxygen-binding site of cytochrome oxidase binding to haemoglobin in the erythrocytes and therefore, blocking the transport of oxygen to tissues Reveal answer Fill a bubble to check yourself B Correct answer Explanation Carbon monoxide inhibits mitochondrial electron transport by blocking electron transport at the level of the cytochrome b-cytochrome c, complex.