In mRNA, AUG is the initiation codon and UAA, UAG and UGA are termination codons, therefore polypeptide cannot be synthesized beyond any of these triplets to the end of mRNA. Then which one of the following mRNA can be translated completely?

AUG UUC UCC UGG UAA UAU

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AUG UUC UCC UGA UGG UAU

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AUC ACG UAU UUC UGA CUC

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AUG UAU UUC UGC CUC UAG

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Solution

The correct option is B AUG UAU UUC UGC CUC UAG
Among the given options, stop codons are not present inbetween the mRNA transcript in option D. Thus, it shows that there will not occur any termination between translation process.
Thus, the correct answer is option D.

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