Effects of Mutations on Protein Function: Missense, Nonsense, and Silent Mutations

A mutation in DNA can affect the amino acid sequence because it affects the code found in _____. A. mRNA B. the nucleus C. rRNA D. tRNA

A. mRNA

Which type of mutation does NOT change the overall function of the protein? A. nonsense B. missense C. silent D. insertion

C. silent

The eleventh amino acid of protein X should be serine, however due to a mutation it now has the amino acid alanine in that position. Which type of mutation could have caused this change? A. Insertion B. Nonsense C. Silent D. Missense

D. Missense

What kind of mutation causes sickle-cell anemia? A. insertion B. nonsense C. silent D. missense

D. missense

Which type of mutation results in an incomplete polypeptide because of an early stop signal? A. silent B. insertion C. missense D. nonsense

D. nonsense