Which one of the following functions is NOT facilitated by a tmRNA?
1
Addition of a stop codon at the 3' end of a defective and/or truncated mRNA.
2
Addition of a proteolysis-inducing tag at carboxyl terminus of unfinished polypeptide.
3
Release of defective and/or truncated mRNA from the ribosome.
4
Recycling of the stalled ribosomes.