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

Question 26
Which statement is not true about thyroxin?

(a) Iron is essential for the synthesis of thyroxin
(b) It regulates carbohydrate, protein and fat metabolism in the body
(c) Thyroid gland requires iodine to synthesise thyroxin
(d) Thyroxin is also called thyroid hormone

What is essential for the production of thyroxine hormone by the thyroid gland?