KROK 1 2010 – Question 5 · KROK (Medicine) · Biological Chemistry
Examination of a patient suffering from cancer of urinary bladder revealed high rate of serotonin and hydroxyanthranilic acid. It is caused by excess of the following amino acid in the organism:
- A. Tryptophan
- B. Methionine
- C. Tyrosine
- D. Alanine
- E. Histidine
Hint
Trace serotonin and hydroxyanthranilic acid back through their biosynthetic pathways to the single amino acid that they have in common.
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