In the synthesis of thyroid hormones, iodine is attached to tyrosine amino acids in colloid, initially forming what two products?

the products formed are Monoiodotyrosine (MIT) and Diiodotyrosine (DIT)

Explanation:

Monoiodotyrosine (MIT) is a precursor of thyroid hormone and results from iodization of tyrosine at the meta- position of the phenol ring, and Diiodotyrosine (DIT) is a precursor in the production of thyroid hormone, and results from iodization of monoiodotyrosine at the other meta- position on the phenol ring.

Once inside the gland, the iodide is oxidized by a peroxidase to iodine and then bound to tyrosine, forming either monoiodotyrosine or diiodotyrosine. Both of these are then coupled enzymatically to form T4 or T3. The T3 and T4 are bound to the protein thyroglobulin and stored as colloid in the gland.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

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