Multiple choice

Human immunodeficiency virus (HIV) is a blood-borne virus and atttacks the immune system of the body. It interacts with which of the following cell surface molecules to gain entry into the cells of the immune system?

  1. CD4

  2. CD19

  3. CD40 ligand

  4. CD8

  5. CD25
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is a major portal of entry, though not the only one. The chemokine receptors CXCR4 and CCR5 are also major portals of entry and reduce the CD4 positive helper T-cell numbers dramatically.

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