How Do the Primary Structures of Normal Hemoglobin and Sickle

question 37

Multiple Choice

How do the primary structures of normal hemoglobin and sickle cell hemoglobin differ?

• A)A glutamic acid residue in normal hemoglobin is replaced by a valine residue in sickle cell hemoglobin.
• B)A valine acid residue in normal hemoglobin is replaced by a glutamic acid residue in sickle cell hemoglobin.
• C)There are four heme groups in normal hemoglobin whereas there are only three heme groups in sickle cell hemoglobin.
• D)There are three heme groups in normal hemoglobin whereas there are 4 heme groups in sickle cell hemoglobin.
• E)Both A and C are correct.