There is only one possible sequence of amino acids when deduced from a given set of nucleotides. But multiple nucleotide sequences can be deduced from a single amino acid sequence. Explain this phenomenon.
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Some amino acids are coded by more than one codon (known as degeneracy of codons), hence on deducing a nucleotide sequence from an amino acid sequence, multiple nucleotide sequence will be obtained.For e.g., Ile has three codons: AUU, AUC AUA hence dipeptide Met–Ile can have the following nucleotide sequence:
(i) AUG – AUU
(ii) AUG – AUC
(iii) AUG – AUA
and if, we deduce amino acid sequence the above nucleotide sequences all the three will code for Met–Ile
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