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Multiple Choice
Which of the following does not occur during eukaryotic RNA processing?
A
Splicing of introns
B
Replication of RNA
C
Addition of a 5' cap
D
Polyadenylation at the 3' end
Verified step by step guidance
1
Understand the process of eukaryotic RNA processing, which involves several modifications to the pre-mRNA before it becomes mature mRNA.
Identify the key steps in RNA processing: splicing of introns, addition of a 5' cap, and polyadenylation at the 3' end.
Splicing of introns involves removing non-coding sequences (introns) from the pre-mRNA, leaving only the coding sequences (exons).
The addition of a 5' cap is a modification where a modified guanine nucleotide is added to the 5' end of the pre-mRNA, which helps in mRNA stability and initiation of translation.
Polyadenylation at the 3' end involves adding a tail of adenine nucleotides to the 3' end of the pre-mRNA, which aids in mRNA stability and export from the nucleus. Replication of RNA is not part of RNA processing; it is a separate process related to the synthesis of RNA from a DNA template.