Thyroxine and catecholamines are derived from_____________?
Correct answer: C. Tyrosine
- A. Alanine
- B. Tryptophan
- C. Tyrosine
- D. Leucine
Explanation
Tyrosine is the precursor of both thyroid hormones, including thyroxine, and catecholamines such as dopamine, noradrenaline and adrenaline. Tryptophan instead gives rise to serotonin and melatonin.
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