Question

In phenylketonuria (pku), which amino acid becomes conditionally essential?

Answer 1

In phenylketonuria (PKU), the conditionally essential amino acid is tyrosine.

Step-by-step explanation:

In phenylketonuria (PKU), the amino acid that becomes conditionally essential is tyrosine. People with PKU have a mutation in the enzyme phenylalanine hydroxylase, which results in the inability to properly break down phenylalanine into tyrosine.

As a result, phenylalanine levels rise to toxic levels, causing damage to the central nervous system and brain. To manage PKU, individuals must follow a strict diet low in phenylalanine and avoid foods high in phenylalanine, such as artificial sweeteners like aspartame.

Answer 2

The answer is Tyrosine. Conditionally essential amino acids is when non essentials amino acid becomes essential. In Phenylketonuria Tyrosine becomes a conditionally essential amino acid that must be provided in the diet. Phenylalanine accumulates and fails to convert to tyrosine during this condition.