Question

In phenylketonuria (PKU), an enzyme that converts one amino acid into another does not work properly. Which of the following is the most likely cause of this genetic condition?

A an error in the transcription of the gene for the enzyme
B a mutation in the DNA sequence that codes for the enzyme
C an excess of the amino acids necessary to produce the enzyme
D a structural variation in the amino acid modified by the enzyme

Answer 1

B a mutation in the DNA sequence that codes for the enzyme

Step-by-step explanation: