Multiple Choice
The difference between normal and sickle-cell hemoglobin is based upon the __________________.
A) number of amino acids in the molecule
B) substitution of one amino acid for another
C) number and orientation of the amino acid chains attached to the heme portion of the molecule
D) number of oxygen molecules that can be carried
E) type of bone marrow that produces it
Correct Answer:

Verified
Correct Answer:
Verified
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