Question

Describe the processing of hnRNA to mRNA in Eukaryotes.

Answer 1

1. Primary transcripts, also known as heterogeneous nuclear RNA (hnRNA), are RNAs that are transcribed from DNA in eukaryotes.
2. The primary transcript, which has both exons and introns, is non-functional.
3. As a result, before it becomes functional, it goes through processing or maturation. Capping, tailing, and splicing are all steps in the process.
4. Methylated guanosine triphosphate is added to the 5 end of heterogeneous nuclear RNA during the capping step.
5. Polyadenylation occurs at the third end of tailing.
6. The technique known as splicing eliminates only introns.
7. The RNA ligase enzyme joins exons in a certain order.
8. After being fully processed, hnRNA is referred to as m-RNA, which is later exported from the nucleus via the nuclear pore in order to be translated.