Q.
Heterogeneous nuclear RNA(hnRNA) is converted to wRNA by
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AMUAMU 2014Molecular Basis of Inheritance
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Solution:
The heterogeneous nuclear RNA(hnRNA) is the precursuor of mRNA, It undergoes splicing, capping and tailing during the process. In E splicing, the introns are removed and exons are joined in a defined order hnRNA undergoes someone processing called as capping and tailing. In capping an unusual nucleotide (methyl guanosine triphosphate) is added to the 5 -end of hnRNA. In tailing, adenylate residues (200−300) are added at 3-end in a template independent manner. It is the fully processed hnRNA, now called mRNA. It is transported out of the nucleous for translation.