Understanding Gene Mutations Quiz

What is a point mutation?

• A mutation that involves the insertion or deletion of a nucleotide

• A mutation that changes a single nucleotide base pair

• A mutation that results in a duplication of a gene segment

• A mutation that involves the rearrangement of chromosome segments

Which type of mutation results in a premature stop codon?

• Silent mutation

• Missense mutation

• Nonsense mutation

• Frameshift mutation

If a DNA sequence changes from ATCG to ATGC, what type of mutation has occurred?

• Insertion

• Deletion

• Substitution

• Duplication

What is a frameshift mutation?

• A mutation that changes one amino acid in a protein

• A mutation that does not change the amino acid sequence

• A mutation that shifts the reading frame of the genetic message

• A mutation that results in a stop codon

Which of the following is an example of a silent mutation?

• A mutation that changes an amino acid to a stop codon

• A mutation that changes an amino acid but does not affect protein function

• A mutation that does not change the amino acid sequence

• A mutation that results in a frameshift

A DNA sequence changes from GATTACA to GATTTACA. What type of mutation is this?

• Insertion

• Deletion

• Substitution

• Inversion

Which type of mutation is most likely to have no effect on the protein produced?

• Missense mutation

• Nonsense mutation

• Silent mutation

• Frameshift mutation

What is the result of a missense mutation?

• A change in a single amino acid in the protein

• A premature stop codon

• No change in the protein

• A shift in the reading frame

If a DNA sequence changes from TCG to TAG, what type of mutation has occurred?

• Missense mutation

• Nonsense mutation

• Silent mutation

• Frameshift mutation

Which of the following mutations involves the removal of a nucleotide from the DNA sequence?

• Insertion

• Deletion

• Substitution

• Duplication