Which of the Following Statements About Phenylketonuria (PKU)is False

question 20

Multiple Choice

Which of the following statements about phenylketonuria (PKU) is false?

• A)Buildup of phenylpyruvic acid affects the nervous system.
• B)The amino acid tyrosine cannot be made.
• C)Production of the hormone thyroxin s affected.
• D)The skin color of those with phenylketonuria is light because of decreased levels of melanin.
• E)Adrenalin levels increase in the blood stream.

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Definitions:

Operon

A group of genes in prokaryotes that are transcribed together and regulated by a single promoter and operator sequence, facilitating coordinated expression of genes with related functions.

Transcription

The process of copying a segment of DNA into RNA, particularly messenger RNA, paving the way for protein synthesis in cells.

Phosphorylation

A biochemical process that involves the addition of a phosphate group to a molecule, such as a protein, which can alter the molecule's function.

Post-Translational Modification

A biochemical process that occurs to a protein after it has been synthesized, altering its function.