Which of the following hormones is an amino acid or its derivative?
Correct answer: D. All of these
- A. Thyroxine
- B. epinephrine
- C. Norepinephrine
- D. All of these
Explanation
Thyroxine is derived from tyrosine, while epinephrine and norepinephrine are catecholamines derived from the amino acid tyrosine. Thus all three are amino-acid derivatives rather than steroids or proteins.
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