Which of the following statements about HIV is incorrect? a)...

Which of the following statements about HIV is incorrect?
a) It is a virus.
b) It attacks red blood cells.
c) It mutates frequently.
d) It is derived from a simian immunodeficiency virus.
e) It contains RNA but not DNA.

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Key Concepts

Cell Tropism and Immune System Targeting

HIV specifically targets immune system cells, particularly the CD4+ T lymphocytes, which are crucial for orchestrating immune responses. It does not infect red blood cells, which is an important distinction in understanding the virus’s pathology and effects on the human body.

Zoonotic Origin

HIV is derived from simian immunodeficiency viruses (SIV) found in non-human primates. This cross-species transmission is an example of zoonosis, highlighting the evolution and adaptation of viruses from animals to humans.

HIV as a Retrovirus

HIV is classified as a retrovirus, meaning it carries its genetic material in the form of RNA and uses the enzyme reverse transcriptase to convert RNA into DNA, which then integrates into the host genome. This process is central to its replication and persistence in the host.

Viral Mutation

One of the hallmark features of HIV is its high mutation rate, which occurs during replication due to errors in reverse transcription. This genetic variability contributes to drug resistance and challenges in vaccine development.

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