<prompt> Which of the following hormone is synthesized from the amino acid Tyrosine?CalcitriolCalcitoninThyroxinCoisol  <response>: The thyroid hormones triiodothyronine T3 and thyroxine T4 in the colloid of the thyroid also are derived from tyrosine. In dopaminergic cells in the brain, tyrosine is conveed to levodopa by the enzyme tyrosine hydroxylase TH. Tyrosine is also the precursor to the pigment melanin. 