People homozygous recessive for a 32-base deletion in the CCR5 gene do not become infected with HIV.
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Q23: Severe combined immune deficiencies (SCID)affect both
A)humoral and
Q24: Experimental gene therapy can be used to
Q25: The functions of antibodies include
A)activating complement,inactivating pathogens,and
Q26: Cluster-of-differentiation antigens are found on
A)B cells,where they
Q27: People who cannot become infected with HIV
Q29: Research suggests a link between a mutation
Q30: Vaccinating a substantial portion of the population
Q31: One way an autoimmune disorder can arise
Q32: B cells secrete antibodies when they
A)bind antigens.
B)are
Q33: HIV destroys the immune system by primarily
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