Which is secreted with a circadian rhythm and involved in the formation of human biological rhythms?
Correct answer: B. melatonin
Melatonin secretion follows a circadian rhythm and is crucial for regulating sleep-wake cycles in humans.
NCERT Biology Class 11, Chapter 19
Endocrine system and hormones NEET Biology MCQ
Last updated: July 30, 2026
Free PDF sample
Get NEET Biology MCQs as a chapter-wise PDF.
Join early access for a free MCQ sample with answers and NCERT-aligned explanations.
More Endocrine system and hormones MCQs
Which hormone is not regulated by the adenohypophysis?Which of the following is not related to ACTH secretion regulation?Which of the following is the location where melatonin is synthesized and secreted?Which of the following hormones can pass through the cell membrane and bind to nuclear receptors to exert its effect?Which hormone is crucial for brain development in fetuses and newborns?