KROK 1 2009 – Question 57 · KROK (Medicine) · Biological Chemistry
A 1.5-year-old child presents with both mental and physical lag, decolorizing of skin and hair, decrease in catecholamine concentration in blood. When a few drops of 5% solution of trichloroacetic iron had been added to the child’s urine it turned olive green. Such alteration are typical for the following pathology of the amino acid metabolism:
- A. Phenylketonuria
- B. Xanthinuria
- C. Tyrosinosis
- D. Alkaptonuria
- E. Albinism
Hint
Link the pigment loss and low catecholamines to a deficient downstream product, and the positive colour test of urine to a metabolite piling up behind a block.
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