The Human Immunodeficiency Virus (HIV)only affects a specific class of cells in the immune system called helper T cells,and not other types of T cells.Which is the best explanation for this observation?

Question

Quizplus · Accepted Answer

The correct answer is D because HIV enters helper T cells by binding to a specific receptor called CD4, which is most abundant on the surface of helper T cells. Other types of T cells, such as cytotoxic T cells, do not have as much CD4 on their surface and are therefore not as susceptible to HIV infection.

The Human Immunodeficiency Virus (HIV)only Affects a Specific Class of Cells