[khanar]

If you restrict phenylalanine from the diet then which amino acid you have to supplement to avoid negative Nitrogen balance?
A- Lysine
B- Isoleucine
C- Argninie
D- Tyrosine
E- Tryptophan

 

[ApplicantGuide]

People with PKU must eat a phenylalanine-restricted, tyrosine-supplemented diet to have optimum brain development and growth.

 

[khanar]

Phenylalanine is an essential amino acid and tyrosine is derived from it, if no phenylalanine then tyrosine becomes essential and you have to give it to the patient