Q. Which hormone regulates sleep cycle?

  • (A) Melatonin
  • (B) Insulin
  • (C) Thyroxine
  • (D) Estrogen
✅ Correct Answer: (A) Melatonin
Explanation: Melatonin controls circadian rhythm.

Published by Mr. Dubey ⭐ 111.42K Points at 27-Apr-2026 05:54 am in Biology

Explanation by: Mr. Dubey
Melatonin controls circadian rhythm.

📝 Notes by Other Students/ Teachers

📊 Question Analytics

👁️
25
Total Visits
📽️
4 mo ago
Published
🎖️
Mr. Dubey
Publisher
📈
95%
Success Rate