Explain and illustrate the steps involved to make fully processed hnRNA?

Question : Explain and illustrate the steps involved to make fully processed hnRNA?

The correct answer is – The hnRNA undergoes processes called capping and tailing followed by splicing .In capping, an unusual nucleotide is added to the 5¢-end of hnRNA methyl guanosine triphosphate. In tailing, adenylate residues (about 200–300) are added at 3¢-end in a template independent manner. Now the hnRNA undergoes a process where the introns are removed and exons are joined to form mRNA