17. Viruses
Viruses
Multiple Choice
Multiple ChoiceHIV, the virus that causes AIDS, only infects certain cells within the immune system. This is because __________.
A
the virus is not very mobile within the body and only comes into contact with a limited number of immune cells
B
other cells produce toxins that destroy the virus before infection can take place
C
the virus gets into all cells, but the viral RNA is immediately destroyed in all but a small number of immune system cells
D
infection requires the presence of a specific DNA sequence that is only present in the genome of certain immune system cells
E
the virus binds to specific receptors that are only present on certain immune cells
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