Which of these is a stop codon in DNA?

The stop codon in DNA refers to a specific sequence of nucleotides that signals the termination or end of protein synthesis during translation. There are three stop codons in DNA: TAA, TAG, and TGA. Among these, TAA is considered a stop codon because when it is encountered by the ribosome during translation, it does not code for any amino acid and instead signals the release of the newly formed protein. Thus, TAA serves as a termination signal in DNA, which is why it is considered a stop codon.