alleryIn eukaryotes, primary mRNA transcript becomes mature mRNA after
Atranslation by ribosomes (typical)
Baddition of 5' cap, 3' poly-A tail and splicing of introns
CDNA replication
Dbinding of helicase
Answer & Solution
Correct answer: B. addition of 5' cap, 3' poly-A tail and splicing of introns
1. The pre-mRNA in eukaryotes undergoes three main post-transcriptional events.
2. A 7-methylguanosine cap is added at 5'; a polyadenylate tail is added at 3'.
3. Introns are spliced out by the spliceosome, joining exons to form mature mRNA.
_Source: Maharashtra Balbharati Std XII Biology, Ch 4 "Molecular Basis of Inheritance" §4.6_
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