Why is the genetic code considered non-ambiguous?

The genetic code is described as non-ambiguous because each specific codon corresponds to only one particular amino acid and does not serve as a code for multiple amino acids. This property of the genetic code ensures that the translation of mRNA into proteins is consistent and precise, enabling reliable communication of genetic information. For example, the codon AUG always codes for the amino acid methionine, whereas AAA will always code for lysine. This singular coding provides clarity in protein synthesis, allowing the genetic information to be accurately interpreted during translation.

While some amino acids may be coded by multiple codons, this feature is distinct from ambiguity. The key distinction lies in the fact that each individual codon has a unique assignment rather than sharing functionality across different amino acids. Thus, the clarity and specificity of codon assignments contribute to the non-ambiguous nature of the genetic code.