Poly 'A' tail attached at 3' end of mRNA helps in?
Unwinding of mRNA
Stabilization of mRNA
Polymerization of mRNA
Transcription of mRNA
Ans. is 'b' i.e., Stabilization of mRNA At the 51-end, mRNA possesses a 7-methylguanosine triphosphate cap which helps in the recognition of mRNA in protein biosynthesis and it helps to stabilize the mRNA by preventing attack of 51-exonuclease. At its 31-end, there is a poly-A tail made up of several adenylate residues which stabilize mRNA by preventing attack of 31-exonuclease.