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A retrovirus is an RNA that uses the host to make it's corresponding DNA.

White blood cells--which HIV takes over--don't contain DNA building blocks (dNTP) because white blood cells don't replicate. So HIV can't make it's corresponding DNA.

Instead, it just replicates using rNTP to produce more RNA. I think (correct me if I'm wrong) rNTP is available because it's used in ATP synthesis.

  (retrovirus (dNTP) DNA)
  (hiv (rNTP) RNA)


I believe rNTPs are available because they are used in transcription.




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