A) Deletion
B) Insertion
C) Frame shift
D) Point mutation
Correct Answer: B
Solution :
Insertion of a base adenine has occured in the original sequence \[\underset{\begin{smallmatrix} \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\text{ }\!\!'\!\!\text{ A }\!\!'\!\!\text{ } \\ \text{CAG}\,\text{ATA}\,\text{GCA}..... \end{smallmatrix}}{\overset{\text{CAG}\,\text{TAG}.....}{\mathop{\uparrow }}}\,\] Insertion of 'A' has shifted the reading frame. Insertion is the addition of one or more nitrogenous bases to the nucleotide chain, changing the complete reading frame.
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