Whereas MRNA Is Basically "Ready to Use" After Transcription in Non-Eukaryotes

question 6

Multiple Choice

Whereas mRNA is basically "ready to use" after transcription in non-eukaryotes, eukaryotic mRNA requires extensive processing (see question 21) . In the process called polyadenylation a poly(A) tail is added to the 3'end of the mRNA strand (approx. 250 adenosine residues) . What is the chemical structure of the 3'-end of the mRNA strand after polyadenylation?

• A) I
• B) II
• C) III
• D) IV

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