Updated: Question in GATE 2012 Biotechnology (BT) Question Paper

A question in GATE 2012 Bio Technology Paper with Solution has been updated:

A truncated polypeptide is synthesized due to a nonsense mutation. Where would you introduce another mutation to obtain a full-length polypeptide?

1. Transfer RNA gene
2. Ribosomal RNA gene
3. Ribosomal protein gene
4. DNA repair gene