Retroviruses have no DNA. However, the DNA of the infected host cell does possess viral DNA. How is it possible? [All India 2015; HOTS]
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The genome of retroviruses consists of RNA.
In the retroviruses the genetic material which is present is the RNA. Due to the reverse transcriptase enzyme it converts the RNA into DNA and as a result of this now both the infected cell which is the first and the the virus both have DNA.
When there is DNA modulation of the host and as a result of this the virus can then act on the the infected host cell and cause it's damage.
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