Among followings, _ enzyme is naturally found in human immunodeficiency virus (HIV).
Correct answer: B. Reverse Transcriptase
- A. Ligase
- B. Reverse Transcriptase
- C. RNA Polymerase
- D. DNA Polymerase
Explanation
HIV is a retrovirus. Its genome consists of RNA molecules, and it possesses a 'reverse transcriptase enzyme', which allows the virus to use its RNA as a template to construct copies of DNA, which it uses to incorporate into the genome of the host cell. The remaining enzymes (ligase, RNA, and DNA polymerase) are present in the host cell, which HIV uses for its own proliferation upon infecting the cell. Hence, the correct option is B.
This question appeared on the UHS 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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