How many molecules of reverse transcriptase are found in HIV?
Correct answer: A. 2
- A. 2
- B. 3
- C. 4
- D. 1
Explanation
Each HIV virion contains two molecules of reverse transcriptase. This enzyme is essential for converting the viral RNA genome into complementary DNA after the virus enters a host cell. HIV carries two identical strands of RNA, and the presence of two reverse transcriptase molecules ensures that reverse transcription occurs efficiently and accurately. The enzyme exists as a heterodimer composed of two subunits, known as p66 and p51, which work together during the synthesis of viral DNA. This precise number of enzyme molecules supports the virus's ability to replicate effectively within the infected host cell.
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