Before termination stage of transcription a GMP cap is added to the 5' end and poly-A tail to 3' end of mRNA.
The link(http://sciencing.com/role-rna-polyadenylation-5434666.html) says:
The poly(A) chain is important for transport of the mRNA from the nucleus where it is synthesized to the ribosomes where protein is translated.
I don't get this point. How does polyadenylation affcts the transportation of mRNA?
Wikipedia says abour capping's functions:
Regulation of nuclear export; Prevention of degradation by exonucleases; Promotion of translation (see ribosome and translation); Promotion of 5′ proximal intron excision.
I don't get how it plays a role in nuclear export.