Which one is not the nonsense codon?

UAA

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UGA

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UCA

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UAG

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Solution

The correct option is C UCA
A nonsense codon is the one for which no normal tRNA molecule exists. The presence of a nonsense codon causes termination of translation. There are three nonsense codons are called amber(UAG), ochre(UAA) and opal (UGA). UCA is not a nonsense codon as it codes for the amino acid serine.

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