Phenylketonuria Is Caused by

question 6

Multiple Choice

Phenylketonuria is caused by

• A) an inherited lack of an enzyme that produces tyrosine.
• B) accumulation of waste products in the brain.
• C) neurofibrillary tangles.
• D) toxic chemicals released by a virus.
• E) leakage from glutamate into the brain blood system.

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Definitions:

Stepfathers

Men who are married to one's mother after the separation, divorce, or death of one's biological father, and who may have a step-parental role.

Stepchildren

Children of one's spouse from a previous relationship, to whom one is not biologically related.

Day-to-Day Activities

The routine tasks and behaviors that individuals engage in regularly, including work, leisure, self-care, and household management.

Nuclear Family Myth

The belief that the nuclear family of parents and children living apart from extended family is the traditional and best family structure, ignoring the diversity of family forms.