Q.

Choose the incorrect statement with respect to structure of mRNA.

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a

Complete length of mRNA is described as translational unit.

b

The first Codon in a translational unit is AUG.

c

The last codon in a translational unit does not indicate any amino acid.

d

Untranslated regions are present before the start codon and after the termination codon.

answer is A.

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Detailed Solution

Complete length of mRNA is not translational unit. The translational unit is present in between Untranslated Region I and Untranslated Region II. In Eukaryotes, in additions to this there is a Cap at the 5ʹ end and poly A tail at the 3ʹ end.
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