HIV destroys a type of defense cell in the body called _ helper lymphocyte.
Correct answer: D. CD4
- A. TD4
- B. T4
- C. C4
- D. CD4
Explanation
HIV (Human Immunodeficiency Virus) primarily targets and infects CD4-positive T cells, which are crucial for coordinating the immune response. The virus binds to the CD4 receptor, enters the cell, and integrates its genetic material into the host's DNA. This leads to the progressive loss of these cells, weakening the immune system. The incorrect options refer to terms or components not directly related to the action of HIV on immune cells: 'TD4' is not a recognized term, 'T4' is incorrect as it does not specifically denote CD4 cells, and 'C4' is part of the complement system and not relevant to lymphocyte targeting by HIV.
This question appeared on the ETEA MDCAT 2019 paper, which you can sit online with every answer explained.
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About AIDS and HIV Infection
HIV is a retrovirus that infects CD4 T lymphocytes and gradually weakens immune function, while AIDS is the advanced syndrome caused by severe immune deficiency. Coverage includes viral transmission, replication, disease progression, opportunistic infections, diagnosis, prevention and the difference between HIV infection and AIDS.
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