Question

Which of the following hormones contains iodine?

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

Answer 1

Answer: (B)

Thyroxine hormone contains iodine. The thyroid gland produces two primary hormones - thyroxine (also referred to as $T4$) and tri-iodothyronine (also referred to as $T3$). The numbers 3 and 4 refer to the number of atoms of iodine in the hormones. Iodine is essential for the production of thyroid hormones. Iodine is found in most foods, especially seafood.