THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of these is NOT a stop codon?
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UAG
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UGG
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UAA
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UGA
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Explanation:
Detailed explanation-1: -3.4. s4UGG behaves as a “weak” stop codon in the photocrosslinking assay. It stimulates eRF1 binding as compared to sense codons (Table 2) and promotes formation of the eRF1–mRNA crosslink.
Detailed explanation-2: -UGG itself is the codon specific to tryptophan. UGU codes for cysteine amino acids.
Detailed explanation-3: -There are 3 STOP codons in the genetic code-UAG, UAA, and UGA. These codons signal the end of the polypeptide chain during translation.
Detailed explanation-4: -Thus the correct answer is (B). UGA, UAG, UAA are called stop codons.
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