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Which of the following is an amino acid derived hormone?

1. (a) Epinephrine
2. (b) Ecdysone
3. (c) Estrodiol
4. (d) Estradiol

Correct answer: (a) Epinephrine

Solution

Epinephrine is a catecholamine synthesized from the amino acid tyrosine, so it is an amino acid-derived hormone. Ecdysone, estradiol, and estradiol are steroid hormones, not amino acid derivatives.

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