Which molecule is used for the attachment of HIV to CD4 receptor on the cell?

Options

A. GP 120
B. P24
C. GP41
D. P17

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the specific molecule that HIV uses to attach to the CD4 receptor on host cells.

2. **Identifying the Virus**: The virus in question is HIV (Human Immunodeficiency Virus), which is responsible for the disease AIDS (Acquired Immunodeficiency Syndrome).

3. **Mechanism of Infection**: HIV infects the host by attaching to specific receptors on the surface of host cells. The primary receptor for HIV is the CD4 receptor.

4. **Role of Glycoproteins**: HIV has surface proteins called glycoproteins that are crucial for its ability to bind to host cells.

5. **Identifying the Specific Glycoprotein**: The glycoprotein responsible for the attachment of HIV to the CD4 receptor is known as GP120.

6. **Function of GP120**: GP120 binds specifically to the CD4 receptor on the host cell, facilitating the entry of the virus into the cell.

7. **Conclusion**: Therefore, the molecule used for the attachment of HIV to the CD4 receptor on the cell is GP120.

**Final Answer**: The molecule used for the attachment of HIV to the CD4 receptor on the cell is GP120.

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