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Q. |
Which one of the following hormones contains iodine? |
A. | Thyroxine |
B. | Testosterone |
C. | Insulin |
D. | Adrenaline |
Answer» A. Thyroxine | |
Explanation: Thyroxine is produced by attaching iodine atoms to the ring structures of this protein's tyrosine residues; thyroxine (T4) contains four iodine atoms, while triiodothyronine (T3), otherwise identical to T4, has one less iodine atom per molecule. |
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