If transition occurs in the second and third nucleotides of the DNA segment reading ATG CTC GA, what shall be the new sequence?

AAC CTC GA

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ACA GTC GA

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ACA CAC GA

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ACA CTC GA

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Solution

The correct option is A AAC CTC GA
Transition in DNA means when a pyrimidine is replaced with another pyrimidine or a purine is replaced with another purine. So here, second and third nucleotide is replaced with Adenine and Cytosine, then the sequence will become AAC CTC GA.
Thus, the correct answer is 'AAC CTC GA.'

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