The maximum number of unique amino acids that could be encoded would be 253 if n the genetic code consisted of four bases per codon rather than three.
A codon could be a DNA or RNA sequence of three nucleotides that shapes a unit of genomic data encoding a specific amino acid or signaling the end of protein synthesis (stop signals). There are 64 different codons 61 are the specify amino acids and 3 are utilized as stop signals.For the genetic code consisting of four bases per codon, there will be four nucleotides such as A, T, G, and C, so the number of codons possible will be: 4^4=256, now since we are given that stop codons are the same will 256-3= 253 which is the total number of the possible number of the codon of unique amino acids
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