Question

In rous sarcoma virus, information flow is _____________.

• A. DNA - Protein - RNA
• B. DNA- RNA- Protein
• C. RNA-DNA-Protein
• D. RNA-DNA -RNA- Protein.

Answer 1

The correct option is D RNA-DNA -RNA- Protein.

• Rous sarcoma virus (RSV) is a retrovirus and is the first oncovirus to have been described.
• It causes sarcoma in chickens. As with all retroviruses, it reverse transcribes its RNA genome into cDNA before integration into the host DNA.
• Then the cell can copy the DNA. The cell can also transcribe the DNA back into RNA as the first step in making viral proteins.

So the correct answer is option D.