Answer: C
Poliovirus is an RNA virus of the picornavirus group which uses its RNA as mRNA. At its 5′ end the RNA genome has a viral protein (VPg) instead of a 5′ cap. This is followed by a non-translated leader sequence and then a single long protein-coding region (~7 000 nucleotides) followed by a poly-A tail. Observations were made that used radioactive amino acids similar in structure to those that are found in viruses and other organisms. Short-period use of the radioactive amino acids result in labeling of only very long proteins while longer p...

This free site is ad-supported. Learn more