Thyroxine, produced in the thyroid gland, is an iodinated derivative of which of the following amino acids?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Tyrosine
NCERT (2026-27 edition):
10.6 Hormones – “Thyroxine produced in the thyroid gland is an iodinated derivative of amino acid tyrosine. Abnormally low level of thyroxine leads to hypothyroidism which is characterised by lethargyness and obesity.”