RNA processing in eukaryotes includes options: the removal of a nucleotide cap to the 5′ end and a poly(A) tail to the 3′ end of the newly transcribed RNA the removal of all exons during RNA splicing the removal of poly(A) tails from the primary transcript the addition of a nucleotide cap to the 5′ end and a poly(A) tail to the 3′ end of the newly transcribed RNA