Which of the Following Occurs in Retroviruses

Question

Which of the following occurs in retroviruses?
A) DNA is replicated in the 3' → 5' direction.
B) DNA is replicated in the 5' → 3' direction.
C) DNA is transcribed to RNA.
D) RNA is reverse-transcribed to DNA.

Accepted Answer

Retroviruses are unique in that they use reverse transcriptase to synthesize DNA from RNA templates. This process is called reverse transcription and results in the formation of a DNA copy of the viral RNA genome. The DNA copy can then integrate into the host cell genome, where it can be transcribed and translated like any other gene.