Explain how hnRNA becomes mRNA?
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The primary transcript (hn RNA) contain both exons and introns and required to be processed before translationally active (mRNA). The introns are removed and exons are joined in a defined order. ... The processed hnRNA is now called mRNA and transported out of the nucleus for translation.
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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.
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