what is a stop codon

Answer 1

A stop codon is a nucleotide sequence in mRNA that signals the end of the protein synthesis process. It is also known as a termination codon, since it marks the point at which the ribosome releases the completed protein chain. There are three different stop codons: UAA, UAG, and UGA. These codons do not code for an amino acid, but instead signal the end of protein synthesis.