Question

Given below is a schematic representation of a mRNA strand

1. In the above sequence, identify the translational unit in mRNA.
2. Where are UTRs found and what is their significance?

Answer 1

1. A translational unit in mRNA is a sequence of RNA flanked by the start codon (AUG) and the stop codon (UAA) that codes for a polypeptide/AUG AUC UCG UAA.
2. Untranslated regions (UTRs). The UTRs are found at both the 5' end (before the start codon) and the 3' end (after the stop codon). They are essential for an effective translation process.