<prompt> Hemoglobin does not bind with:OxygenCarbon dioxideCarbon monoxideHCN  <response>: Hemoglobin Combines Reversibly With Oxygen.Carbon monoxide CO combines with hemoglobin at the same point on the hemoglobin molecule as does O2 ; it can therefore displace O2 from the hemoglobin.CO2 reacts directly with amine radicals of the hemoglobin molecule to form the compound carbaminohemoglobin CO2 Hgb. This combination of CO2 and hemoglobin is a reversible reaction that occurs with a loose bond, so the CO2 is easily released into the alveoli, where the PCO2 is lower than in the pulmonary capillaries.Reference: : Guyton physiology pg no 532,535 