A DNA Sequence Encodes a Protein with the Amino Acid

question 27

Essay

A DNA sequence encodes a protein with the amino acid sequence Met-Leu-Ser-Ile-Met-Ala. A mutation occurs in the DNA sequence so that now it encodes a protein with the amino acid sequence Met-Leu-Val.
a. Propose an explanation for the type of mutation that produces the new amino acid sequence.
b. Give an example of a second mutation that would produce the following amino acid sequence: Met-Leu-Val-Ile-Met-Ala.

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