Now, what do we mean by one to one? So does a single nucleotide correspond to a specific amino acid? Now, would that even be possible? We have four different types of nucleotides and 20 different types of amino acids. And what that means is, if this was the case, if each nucleotide corresponded to a specific amino acid, because we only have four nucleotides, we would only be able to produce four amino acids. And that clearly doesn't work because in our body, we have 20 unique amino acids.