Multiple Choice
Which of the following is an example of a beneficial mutation in humans?
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17. Mutation, Repair, and Recombination
Types of Mutations
Multiple Choice
Which of the following point mutations changes a purine nucleotide to a pyrminidine nucleotide?
A
Indel mutation
B
Transversion
C
Transitions
D
Nonsense mutation
Verified step by step guidance1
Understand the types of point mutations: Point mutations involve changes in a single nucleotide base pair in DNA. The main types are transitions and transversions.
Define transitions: A transition mutation is a point mutation that changes a purine to another purine (A ↔ G) or a pyrimidine to another pyrimidine (C ↔ T).
Define transversions: A transversion mutation is a point mutation that changes a purine to a pyrimidine or vice versa. Purines are adenine (A) and guanine (G), while pyrimidines are cytosine (C) and thymine (T).
Identify the mutation type that changes a purine to a pyrimidine: Since transversions involve changing a purine to a pyrimidine, this is the correct type of mutation for the problem.
Review the options: Compare the definitions of the mutation types with the options provided. The correct answer is 'Transversion' as it involves changing a purine to a pyrimidine.
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