The human immunodeficiency virus (HIV) is so named because it cripples the immune system by attacking and destroying helper T cells (TH cells). What cell surface protein does the HIV virus most likely use to bind to and infect the TH cells?
A. CD8
B. Defensin
C. CD4
D. MHC class I proteins
E. Membrane-attack complex
F. Mannose-binding lectin protein
G. Toll-like receptor
Answer: C
Biology & Microbiology
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