Question

Write the transcribed mRNA of a DNA strand with the base sequence GAT CAT ACT. What is the name and the specific role of the last codon of the transcribed mRNA in this case?

Answer 1

The transcribed mRNA sequence for the DNA strand GAT CAT ACT is CUA GUA UGA.

The name of the last codon is UGA; this is known as a Stop Codon (specifically called the Opal codon).

Its role is to signal the termination of translation. It does not code for any amino acid; instead, it recruits release factors that instruct the ribosome to stop protein synthesis and release the completed polypeptide chain.