Which of the Following Statements About Phenylalanine Is(are)TRUE

question 25

Multiple Choice

Which of the following statements about phenylalanine is(are) TRUE?

• A)The enzymatic degradation of phenylalanine requires the biopterin cofactor.
• B)Individuals with defects in phenylalanine catabolism require tyrosine in their diet.
• C)An inability to hydroxylate phenylalanine results in increased blood levels of phenylalanine,causing mental retardation.
• D)A and C
• E)A,B,and C

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Definitions:

Genital Stage

In Freud's psychosexual stages of development, the final stage beginning in puberty where sexual energy is focused on the genitals, and the individual has an interest in mature sexual relationships.

Latency Stage

The latency stage is a phase in Freudian psychosexual development occurring from age six to puberty, characterized by a decrease in sexual urges and interest.

Development

The process of growth, change, and improvement in a particular aspect, such as physical, cognitive, or social development.

Defense Mechanism

Unconscious psychological strategies used to cope with reality and to maintain self-image by reducing anxiety arising from unacceptable thoughts or feelings.