Topics:
Animal Nutrition, Animal Refresher
Sulphur-Containing Hormones
Which of the following is/are sulphur-containing hormone(s)?
- Insulin
- Oxytocin
- Prolactin
- All the above — Correct Answer
Explanation:
Correct Answer: All the above
Insulin, Oxytocin, and Prolactin all contain sulphur in their structure — primarily via the disulphide (S–S) bridges formed by cysteine residues.
Sulphur-Containing Hormones
| Hormone | Sulphur Role |
|---|---|
| Insulin | Disulphide bridges between A and B chains (Cys residues) |
| Oxytocin | Disulphide bridge forming the ring structure (Cys1–Cys6) |
| ADH/Vasopressin | Disulphide bridge (structurally similar to Oxytocin) |
Complete List of Sulphur-Containing Biomolecules
- Vitamins: Thiamine (B1), Biotin (B8)
- Amino acids: Methionine, Cysteine, Homocysteine, Taurine
- Hormones: Insulin, ADH/Vasopressin, Oxytocin
- Wool contains 4% sulphur; human hair keratin contains 14% sulphur
- Recommended N:S ratio in ruminant diet: 10:1; in wool: 5:1
Why Other Options Are Wrong
- Insulin alone, or Oxytocin alone → each is correct but incomplete; all three are sulphur-containing hormones
📚 About this Topic — Animal Nutrition
This multiple choice question is from Animal Nutrition, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Nutrition to strengthen your preparation.
