Question

Several minerals such as iron, iodine, calcium and phosphorous are important nutrients. Iodine is found in

• A. Thyroxine
• B. Adrenaline
• C. Insulin
• D. Testosterone

Answer 1

Answer: (A)

Thyroxine

• The thyroid gland absorbs iodine obtained from diet and converts it into thyroid hormones- thyroxine ($T_4$) and triiodothyronine ($T_3$).
• These cells combine iodine and the amino acid tyrosine to make $T_3$ and $T_4$ that are released into the bloodstream.
• These hormones are transported throughout the body where they play a role in metabolism.
  Thus the correct answer is option A.