Ans -C- RNA editingIn rna editing editosome can edit only in 3- 5 direction, along with primary rna transcript.DNA replication goes in the 5' to 3' direction because DNA polymerase acts on the 3'-OH of the existing strand for adding free nucleotides.In transcription the complementary RNA is created in the opposite direction, in the 5' - 3' direction, matching the sequence of the sense strand with the exception of switching uracil for thymine.When the strand containing the mis-match is identified, an endonuclease nicks the strand and the mis-matched nucleotide(s) is/are removed by an exonuclease.
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