The CAPPED 5' end of eukaryotic mRNA
A) consists of poly A sequences.
B) contains a 5' to 5' link between ribose residues mediated by a triphosphate ester bridge.
C) is transcribed directly from DNA sequences.
D) is of NO significance for the activity of mRNA in translation.
E) is ligated directly adjacent to the AUG codon in mRNA.

Question

Quizplus · Accepted Answer

The capped 5' end of eukaryotic mRNA contains a 5' to 5' link between ribose residues mediated by a triphosphate ester bridge, which is required for efficient translation initiation. Poly A sequences are found at the 3' end, not the 5' end, of eukaryotic mRNA. The capped 5' end is transcribed indirectly from DNA sequences through the action of a capping enzyme. The capped 5' end is crucial for the activity of mRNA in translation, as it allows for efficient recognition and binding by the ribosome. The capped 5' end is not necessarily directly adjacent to the AUG codon in mRNA.

The CAPPED 5' End of Eukaryotic MRNA