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In mRNA , AUG is the initiating codons a...

In mRNA , AUG is the initiating codons and UAA, UAG and UGA are terminatinng codona . Therefore, the polypeptide cannot be synthesised beyond any of these triplets to the end of mRNA, then which one of the following mRNA can be translated completely?

A

AUG UUC UCC UGG UAA UAU

B

AUG UUC UCC UGA UGG UAU

C

AUC ACG UAU UUC UGA CUC

D

AUG UAU UUC UGC CUC UAG

Text Solution

Verified by Experts

The correct Answer is:
D
`{:("AUG" ,, "UUC" ,, "UCC",, "UGG" ,, "UAA" ,,"UAU",, "I") , ("AUG" ,, "UUC" ,, "UCC" ,, "UGA" ,, "UGG" ,, "UAU" ,, "II") , ("AUC",, "ACG" ,, "UAU" ,, "UUC" ,, "UGA" ,, "CUC" ,, "III"), ("AUG" ,, "UAU" ,, "UUC" ,, "UGC" ,, "CUC" ,, "AUG" ,, "IV"):}`
Conclusion : Sequence I, II and III contain stop codon while sequence IV do not contain stop codon therefore polypeptide chain synthesised completely.
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