KROK 1 2021 – Question 43 · KROK (Medicine) · Biological Chemistry
Tyrosine is used as a substrate in thyroxine synthesis. What chemical element takes part in this process?
- A. Copper
- B. Calcium
- C. Zinc
- D. Iodine
- E. Iron
Hint
Think about which trace element, taken up by follicular cells and activated by thyroid peroxidase, becomes attached to tyrosyl residues of thyroglobulin.
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