What are the Two Basic "Ingredients" for the Synthesis of Thyroid

Question

What are the two basic "ingredients" for the synthesis of thyroid hormone?
A)​tyrosine and calcium
B)lysine and calcium
C)dopamine and iron
D)arginine and iodine
E)​tyrosine and iodine

Accepted Answer

The two basic "ingredients" for the synthesis of thyroid hormone are tyrosine and iodine. Lysine, dopamine, arginine, and calcium are not involved in the synthesis of thyroid hormone. Iron may be needed in the formation of heme, which is then incorporated into the enzyme thyroperoxidase that catalyzes the iodination of tyrosine residues in the thyroglobulin protein, but it is not a direct ingredient for the synthesis of thyroid hormone.