Question 01: Phenylalanine in humans: |
|---|
| Is converted to phenylpyruvate |
| Is the precursor of the neurotransmitter acetylcholine |
| Is a non-essential amino acid |
| Is mainly excreted in the urine as phenylacetate |
| Check answer |
ExplanationPhenylpyruvate is the primary breakdown product of phenylalanine (transamination reaction with alpha-ketoglutarate) and is the main excretory product. Phenylacetate is a minor breakdown product. Phenylalanine is an essential amino acid and can be incorporated into protein by any tissue that synthesises protein. |