* Codons are read in groups of three: Codons are units of three nucleotides that code for specific amino acids. The reading frame starts at the beginning of the gene and progresses in groups of three.
* The end of a gene is marked by a stop codon: Stop codons (UAA, UAG, UGA) signal the end of protein synthesis. They don't code for an amino acid.
* The sequence after the stop codon is not translated: The DNA sequence after the stop codon is not translated into protein.
Therefore, the last three codons are not particularly relevant in the context of protein synthesis.
It's important to remember that the "end" of a DNA sequence can also refer to the end of a chromosome. In this case, the terminal sequence can be a repeating sequence of nucleotides, which serves structural purposes in DNA replication.
