Question

Iodine occurs in human body as

• A. Thyroxine
• B. Inorganic iodide
• C. Protein bound iodine
• D. All the above

Answer 1

Answer: (D)

All the above

Thyroid gland secretes the hormone known as thyroxine which helps to maintain the metabolism. Its deficiency causes myxoedema. Myxoedema is caused by deficiency of thyroid hormone in adults.

Inorganic iodides forms salt which are soluble in water. The oxidation state of the inorganic iodide is 1.

On addition to amino acid the inorganic iodine changes to protein bounded iodine. For example, iodine on attachment with tyrosine forms thyroid hormones.

So, the correct answer is option D.