<prompt> True statement about hemoglobin is ?Each hemoglobin molecule is made of 4 polypep tides of each subunitTwo alpha and two beta subunits having a 02 attached to each subunitEach hemoglobin molecule binds to only one 02 moleculeEach hemoglobin has one heme molecule  <response>: Ans. is a i.e., Each hemoglobin molecule is made of 4 polypeptides of each subunit 