Question

In an mRNA molecule, untranslated regions (UTRs) are present at

• A. 5'-end (before start codon)
• B. 3'-end (after stop codon)
• C. both (a) and (b)
• D. no UTRs are present in mRNA

Answer 1

The correct option is C both (a) and (b)

mRNA has some additional sequences that are not translated and are referred as untranslated regions (UTRs). The UTRs are present at both the 5'-end (before the start codon) and the 3'-end (after the stop codon). They are required for an efficient translation process.