The envelope glycoprotein gp120 of HIV is important because it
- A. makes vaccination unnecessary
- B. destroys the host's red blood cells
- C. binds to receptors on host cells and allows the virus to enter
- D. makes the virus resistant to heat
Explanation
gp120 projects from the envelope and locks onto CD4 receptors, the first step of infection, which is why it is also the main target researchers aim antibodies at. It has no role against heat or red cells.
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