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Under which of the following conditions will there be no change in the reading frame of the following mRNA?

5' AACAGCGGUGCUAUU 3'

  • Option 1)

    Insertion of G at 5th position

  • Option 2)

    Deletion of G from 5th position

  • Option 3)

    Inseration of  A and G at 4th  and 5th position respectively

  • Option 4)

    Deletion of GGU from 7th ,8th  and 9th positions

Answers (1)

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Insertion or deletion of one or two bases changes the reading frame from the position of insertion or deletion. Hence, option 1,2 and 3 would cause change in reading frme. Deletion of three bases delets a codon and reading frame remains unaltered from that point onwards.

 


Option 1)

Insertion of G at 5th position

Option 2)

Deletion of G from 5th position

Option 3)

Inseration of  A and G at 4th  and 5th position respectively

Option 4)

Deletion of GGU from 7th ,8th  and 9th positions

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