Question

Which of the following is an amino acid derived hormone ?

• A. Epinephrine
• B. Estradiol
• C. Ecdysone
• D. Estriol

Answer 1

The Correct Option is A

To determine which of the given options is an amino acid derived hormone, we need to understand the classification and origin of different hormones.

Amino acid derived hormones are synthesized from specific amino acids and often retain an amine group from their precursor. These hormones include catecholamines and thyroid hormones.

1. Epinephrine: Also known as adrenaline, this is a catecholamine hormone synthesized from the amino acids tyrosine. It is a classic example of an amino acid-derived hormone, produced in the adrenal medulla.
2. Estradiol: This is a steroid hormone produced from cholesterol, not an amino acid. It is not classified as an amino acid-derived hormone.
3. Ecdysone: This is an insect hormone that controls molting and metamorphosis. It is a steroid hormone, not derived from amino acids.
4. Estriol: Like estradiol, estriol is also a steroid hormone derived from cholesterol.

Based on this information, Epinephrine is the correct answer as it is directly synthesized from the amino acid tyrosine.

In conclusion, since epinephrine is derived from an amino acid, it is the correct choice, while the others are steroid hormones not derived from amino acids.