Question

only ambiguous codon in entire genetic code is? ​

Answer 1

The NUN codon block, which is thought to have originally encoded only valine, is one example in which ambiguity is thought to have been important in codon assignments. This codon block incorporated leucine, isoleucine, and methionine into the genetic code, each in successively smaller codon blocks.

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Answer 2

GUG codon

Explanation :

Only GUG is ambiguous codon, it normally codes for valine but at initiating position it codes for methionine.

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