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Example Question #11 : Understanding Types Of Mutation
A transition is a mutation that includes a purine mutating to another purine or a pyrimidine mutating to another pyrimidine.
Which option shows a transition mutation?
Possible Answers:
Cytosine to thymine
Adenine to thymine
Guanine to cytosine
Adenine to guanine
Thymine to guanine
Correct answer:
Adenine to guanine
Explanation:
Given the explanation provided, a transition is a mutation that mutates a purine to another purine, or a pyrimidine to another pyrimidine. The best way to solve is to assign the nucleotide as a purine or pyrimidine. To answer this, you must know that purines include adenine and guanine and pyrimidines include thymine, cytosine, and (in RNA) uracil.
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