The CD4 molecule is a cell-surface protein receptor for HIV, meaning it allows the virus to attach and enter the cell. It is found on several types of immune cells, including T-helper cells, macrophages, and dendritic cells. However, it is not exclusive to T-helper cells, and it is not an HIV surface glycoprotein.

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The CD4 Molecule Is

Question 19

Multiple Choice

The CD4 molecule is

A) an HIV surface glycoprotein.
B) a cell-surface protein receptor for HIV.
C) found only on T-helper cells.
D) an HIV surface glycoprotein that is found only on T-helper cells.

Correct Answer: