Which statement is not true about thyroxin?
(a) Iron is essential for the synthesis of thyroxin
(b) It regulates carbohydrates, protein and fat metabolism in the body
(c) Thyroid gland requires iodine to synthesise thyroxin
(d) Thyroxin is also called thyroid hormone
Answer: A
Solution: Thyroid gland produces a hormone called thyroxine into the bloodstream. It regulates the rate of metabolism in the body. Iodine is necessary for the production of thyroid hormones- T3 and T4.