An example of a conditionally essential amino acid is:
A) valine.
B) leucine.
C) lysine.
D) tyrosine.
E) methionine.

Question

Quizplus · Accepted Answer

Tyrosine is considered a conditionally essential amino acid because it can be synthesized from the essential amino acid phenylalanine, but under certain conditions (such as phenylketonuria), the body may not be able to produce enough tyrosine to meet physiological needs. Valine, leucine, lysine, and methionine are all considered essential amino acids because they cannot be synthesized by the body and must be obtained through the diet.

An Example of a Conditionally Essential Amino Acid Is