An example of a secondary acquired immunodeficiency is
A. AIDS.
B. adenosine deaminase (ADA) deficiency.
C. agammaglobulinemia
D. DiGeorge syndrome.
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SCID is defined by a lack of functional B and T cells which eliminates protection by humoral and cell-mediated immunity. Which of the following is true?
A. A genetic defect disrupts the development of the lymphocytic cell lines.
B. A genetic mutation renders the individual incapable of removing a toxic DNA metabolite from lymphocytes, which ultimately destroys them
C. Genes coding for B and T cell receptors are mutated so the cells are incapable of binding antigens.
D. All of the above describe cases of SCID.
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