Question

Which one of the following is a peptide hormone:-

• A. Glucagon
• B. Testosterone
• C. Thyroxin
• D. Adrenaline

Answer 1

The Correct Option is A

To determine which of the given options is a peptide hormone, we need to first understand what a peptide hormone is. Peptide hormones are hormones whose molecules are peptides, consisting of chains of amino acids. They are produced by the endocrine glands and released into the bloodstream to regulate various physiological processes. Now let's evaluate each option:

1. Glucagon: Glucagon is indeed a peptide hormone. It is produced by the alpha cells of the pancreas. Its primary role is to increase blood glucose levels by promoting gluconeogenesis and glycogenolysis in the liver.
2. Testosterone: Testosterone is a steroid hormone, which means it is synthesized from cholesterol. It is primarily produced in the testicles and is responsible for the development of male characteristics.
3. Thyroxin (Thyroxine): Thyroxine is not a peptide hormone. It is an iodinated amino acid derivative hormone produced by the thyroid gland, and it plays a critical role in regulating metabolism.
4. Adrenaline (Epinephrine): Adrenaline is not a peptide hormone. It is a catecholamine, which is a type of monoamine proclaimed from adrenal glands, and it is crucial for the fight-or-flight response.

Based on this analysis, the correct answer is Glucagon, as it is the only peptide hormone among the options provided.