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Which of the following is a non-coding ( not translated into amino-acid(s))? * Downstream trailing sequence,...

Which of the following is a non-coding ( not translated into amino-acid(s))? *
Downstream trailing sequence, upstream leader sequence and stop codons
STOP codons
Upstream leader sequence
Downstream trailing sequence

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The stop Codon are the specific Codon that do not code for any amino acid. These codons are UAA, UAG and UGA. Therefore stop Codon is a non-coding. Hence, option b is correct.

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