1.2 Mammalian (and human) red blood cells contain a large amount of hemoglobin, a protein that...
1.2
Mammalian (and human) red blood cells contain a large amount of hemoglobin, a protein that binds O2.
Which of the following descriptions is NOT true about the protein hemoglobin?
Select one:
a. Different globin polypeptides are encoded by different genes.cross out
b. There are two alpha-like and two beta-like polypeptides in each hemoglobin protein.cross out
c. The hemoglobin protein is a homotetramer of globin polypeptides.cross out
d. The functional hemoglobin protein contains four (4) globin polypeptides.cross out
e. Each globin polypeptide contains a Heme molecule.
Homework Answers
C) The hemoglobin protein is a homotetramer of globin polypeptides.
Explanation-
Homotetramer is a protein complex having 4 identical subunits. But hemoglobin is a heterotetramer because it has 4 polypeptide chains, out of which 2 are alpha chains and other 2 are beta chains . Each globin chain has one heme molecule and plays an important role in oxygen transport.
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1.2
Mammalian (and human) red blood cells contain a large amount of
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