Question

List the changes hnrna undergoes and where in the cell such changes occur

Answer 1

heyyy mate..........

hnRNA undergoes post transcriptional modifications inorder to convert it into a functional RNA .

The hnRNA contain both exons and introns. The exons are functional coding segments while introns are non functional and non coding sequences.

This hnRNA undergo processing where in the introns are removed and exons are joined by a process called and splicing.

Now this transcribed heterogenous nuclear RNA undergoes additional processing called capping and tailing.

In capping methyl guanosine triose phosphate which in an unusual nucleotide is added to 5 end and in tailing 200-300 adenylate residues are added at 3' end of spliced RNA. This is completely processed hnRNA. This is now called a mRNA.

such changes of processing takes place in the nucleus of the cell.

hope it helps......