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Q.
Which is present at $5'$ end of eukaryotic $mRNA$?
Molecular Basis of Inheritance
Solution:
At the $5' $ end of eukaryotic $mRNA, 7 \,mG$ ($7$-methyl
guanosine) is present. In eukaryotes, primary transcript
is often larger than the functional $RNAs$. Therefore,
post-transcription processing is required to convert
primary transcript of all types of $RNAs $ into functional
$RNAs$ . It is of four types; cleavage, splicing, terminal
addition and nucleotide modification.
The terminal additions include capping and tailing. In
capping, $7 \,mG$ is added to $5'$ end of $mRNA$ .