Which one of the following hormones contains iodine?

(a) Thyroxine (b) Testosterone (c) Insulin (d) Adrenaline

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1 Answers

(a) Thyroxine hormone and tri-iodothyronine hormone are secreted by thyroid follicular cells of thyroid gland. The major component of thyroxine hormone is iodine. Deficiency of iodine causes goitre in human.

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