Which of these regions are attached to hnRNAs and mRNAs after transcription has been completed,and are essential for efficient translation and stability of the mRNAs?

Question

Quizplus · Accepted Answer

Poly(A) tails are added to the 3’ end of eukaryotic mRNA molecules and are essential for efficient translation and stability of the mRNAs. HnRNAs are precursor molecules that contain introns, therefore introns are not attached to hnRNAs or mRNAs after transcription. Poly(U) tails are not a natural modification of mRNA in eukaryotes. Exons are part of the coding sequence of mRNA and are important for protein synthesis but are not specifically involved in translation efficiency and mRNA stability.

Which of These Regions Are Attached to HnRNAs and MRNAs