Question

Explain the processing the hnrna needs to undergo before becoming functional mrna in eukaryotes

Answer 1

The precursor of mRNA, i.e., hnRNA, contains both introns and exons. Introns are removed and exons are joined by a process called splicing. The remaining mRNA is processed in two ways :

Capping : An unusual nucleotide (methyl gunosine triphosphate) is added to the 5′-end of hnRNA.

Tailing : Adenylate residues (200-300) are added at 3′-end in a template independent manner. When hnRNA is full processed, it is known as mRNA, which is transported out of the nucleous.

Answer 2

Answer:

The hnRNA undergoes the following processes to form mRNA:

(i) Capping: Addition of methyl guanosine triphosphate at 5'-end.

(ii) Tailing: Addition of 200-300 adenylate residues at 3'-end.

(iii) Splicing: Removal of introns and joining of exons.

Explanation:

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