Multiple Choice
Based on scientific research, which statement best describes mutations?
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15. Gene Expression
Mutations
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A point mutation in which a single base pair is inserted or deleted from DNA is called a(n) __________.
A
nonsense mutation
B
inversion mutation
C
silent mutation
D
frameshift mutation
Verified step by step guidance1
Understand the concept of a point mutation: A point mutation is a genetic mutation where a single nucleotide base is changed, inserted, or deleted from a sequence of DNA or RNA.
Identify the types of point mutations: These include substitutions, insertions, and deletions. Substitutions replace one base with another, while insertions and deletions add or remove a base, respectively.
Recognize the impact of insertions and deletions: When a single base pair is inserted or deleted, it can cause a shift in the reading frame of the genetic code, known as a frameshift mutation.
Differentiate between types of mutations: A nonsense mutation results in a premature stop codon, an inversion mutation involves a segment of DNA being reversed, and a silent mutation does not change the amino acid sequence.
Conclude that a single base pair insertion or deletion leading to a shift in the reading frame is called a frameshift mutation.
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