Question

Which of the following hormones does not contain a polypeptide?

• A. Prostaglandin
• B. Oxytocin
• C. Insulin
• D. Antidiuretic hormone

Answer 1

Answer: (A)

Prostaglandin

There are three type of hormone in humans: lipid-derived, amino acid-derived, and peptide hormones. Most lipid hormones are steroid hormones, which are insoluble in water. Steroid hormones are estradiol, testosterone, aldosterone, and cortisol. The amino acid-derived hormones are epinephrine and norepinephrine (produced by the adrenal medulla),Amino acid-derived hormones also include thyroxine (produced by the thyroid gland) and melatonin (produced by the pineal gland). These hormones are derived from tyrosine and tryptophan amino acids. Peptide hormones consist of a polypeptide chain; they include molecules such as oxytocin (short polypeptide chain) or growth hormones (proteins). Amino acid-derived hormones and protein hormones are water-soluble and insoluble in lipids.

So, the correct answer is 'Prostaglandin'