Gene mutation review

What is a point mutation in the context of genetic mutations?

• A mutation affecting a large segment of DNA

• A mutation that occurs only in non-coding regions of DNA

• A mutation that involves a change in a single nucleotide base pair

• A mutation that results in the duplication of a whole gene

Which type of mutation is characterized by the substitution of one amino acid for another in a protein?

• Silent mutation

• Missense mutation

• Nonsense mutation

• Insertion mutation

What is the effect of a nonsense mutation on protein synthesis?

• It leads to a longer protein than intended

• It results in a premature stop codon

• It has no impact on the protein's function

• It causes the protein to fold incorrectly

What type of mutation causing sickle cell anemia?

• Nonsense mutation cause by base substitution

• Missense mutation cause by base substitution

• Silent mutation cause by base substitution

• Frameshift mutation cause by base deletion

Why are insertion and deletion mutations so harmful?

• They change all of the codons from the mutation on down the line, which changes the amino acid sequence

• They insert things that an organism doesn't need.

• They often delete things that organisms need.

• Insertion and deletions are not any more harmful than substitution mutations.