Question

One of the following statements is not true about thyroxine. This is :
(a) Thyroid gland requires iron to synthesise thyroxine
(b) It regulates carbohydrate, protein and fat metabolism
(c) Iodine is essential for the synthesis of thyroxine
(d) Thyroid gland can enlarge due to lack of thyroxine

Answer 1

(a) thyroid gland requires iron to synthesise thyroxine.
Statement (a) is incorrect. Iodine is required for the synthesis of thyroxine hormone by the thyroid gland.