Review Questions

6. Methionine is coded for by

A. one codon only.

B. two different codons.

C. three different codons.

D. four different codons.

E. six different codons.

7. A missense mutation is one that

A. creates a stop codon in the mRNA.

B. changes the codon of one amino acid to that of another.

C. changes the reading frame of the mRNA.

D. creates a break in the DNA strand.

E. has no effect on the amino acid sequence.

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