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Q.

Which of the following mRNA can be transcribed ?

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a

AUG UUU UGA

b

UAA UAC UGG

c

UAG UGA UUU

d

UGA UUU UGG

answer is A.

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Detailed Solution

Only the mRNA with AUG UUU UGA can be transcribed because it possesses an initiation codon-AUG which codes for methionine. Rest of the mRNA sequences start with termination codons, i.e. UAA (ochre), UAG (Amber) and UGA (opal). Therefore, these cannot be transcribed.

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