Multiple Choice
How many chemically distinct classes of human immunoglobulins are there?
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An antibody's variable region:
1. Varies in amino acid sequence to allow different antibodies to bind different antigens.
2. Is located in the hinge and stem regions of an antibody.
3. Is a portion of the light chain of an antibody.
4. Is a portion of the heavy chain of an antibody.
_________ is another name for antibodies.
Genetic recombination frequently occurs in the body’s B cell population. Why is this advantageous to the
immune system?