Give an account of post transcriptional modifications of a eukaryotic mRNA.
Post transcriptional Modifications:
The primary transcripts are non- functional that contains both the coding region, exon and non- coding region, intron in RNA and are called heterogeneous RNA or hnRNA. In eukaryotes, three types of RNA polymerases are found in the nucleus:
The hnRNA undergoes two additional or main processes called capping and tailing.
In capping, an unusual nucleotide, methyl guanosine triphosphate is added to the 5’ end of the hnRNA. In tailing, adenylate residues about 200- 300 are added at the 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 by the process known as Splicing.
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Welcome to the NCERT Solutions for Class 12 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 0 , Question 3: Give an account of post transcriptional modifications of a eukaryotic mRNA.....
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