Hemoglobin is ________.
A. a tertiary protein with two polypeptides
B. a quaternary protein with two polypeptides
C. a tertiary protein with four polypeptides
D. a quaternary protein with four polypeptides
Answer:D
Hemoglobin is ________.
A. a tertiary protein with two polypeptides B. a quaternary protein with two polypeptides C. a tertiary protein with four polypeptides D. a quaternary protein with four polypeptides