KROK 1 2023 – Question 119 · KROK (Medicine) · Biological Chemistry
Chemically, thyroid hormones (thyroxine and triiodothyronine) are amino acid derivatives. Name this amino acid.
- A. Tyrosine
- B. Methionine
- C. Proline
- D. Threonine
- E. Tryptophan
Hint
Iodine is attached to an aromatic ring on the side chain of certain residues inside thyroglobulin; of the listed amino acids, think about which aromatic one also serves as the starting material for dopamine and adrenaline.
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