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Phenylketonuria is a rare genetic disorder that is caused by a mutation in the PAH...

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Phenylketonuria is a rare genetic disorder that is caused by a mutation in the PAH gene. Thisgene normally codes for the production of an enzyme that breaks down phenylalanine (found infood). Patients with the disorder have a toxic level of phenylalanine in their bodies which causes intellectual disability and seizures.Which of the following best explains why the mutation causes the severe symptoms?A nonsense mutation interferes with the production of phenylalanineA silent mutation impairs the enzyme's function due to improper foldingA frameshift mutation impairs the enzyme's function de to improper foldingA missense mutation causes too many copies of the enzyme to be transcribed

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