True statement about hemoglobin is ?
Ans. is 'a' i.e., Each hemoglobin molecule is made of 4 polypeptides of each subunit
Each hemoglobin molecule is made of 4 polypep tides of each subunit
Two alpha and two beta subunits having a 02 attached to each subunit
Each hemoglobin molecule binds to only one 02 molecule
Each hemoglobin has one heme molecule