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  4. hn RNA undergoes two additional process. Out of them in one process an unusual nucleotide (methyl GPT) is added to the 5' end of molecule. What would you called this?

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Q. $hn\,RNA$ undergoes two additional process. Out of them in one process an unusual nucleotide (methyl GPT) is added to the $5'$ end of molecule. What would you called this?

AIIMSAIIMS 2013

Solution:

Heterogeneous nuclear RNA undergoes two additional processing known as capping and tailing. In capping process an unusual nucleotide. Methyl guanosine monophosphate (methyl GMP) is added to $5'$ end of the RNA.
In tailing process, a adenlate residues $(200-300)$ are added at $3'$ end in template independent manner. In splicing, introns are removed and exons are joined in a definite order. Termination is the ending process in gene expression.