Final answer:
The single base change from codon AAG (lysine) to AAC (asparagine) represents the amino acid alteration with a single nucleotide mutation.
Step-by-step explanation:
The question pertains to a change in genetic coding from lysine to asparagine and which single base change in a codon could account for this amino acid alteration. According to the codon chart provided, the codons for lysine are AAA and AAG, while the codons for asparagine are AAU and AAC. The only possible codon from the options that could change from lysine to asparagine with a single base mutation is codon AAG to AAC (changing G to C).