Example 1 · difficulty 2/5
During childbirth and subsequent nursing, which hormone is associated with strong uterine contractions and milk ejection, respectively?
- A. Prolactin
- B. Vasopressin
- C. Oxytocin
- D. Growth hormone
2026 source guide · Biology
NEET 2026 Biology Chemical Coordination and Integration Questions
Use this page to connect the official 2026 paper with current Biology practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.
What to master
endocrine glands, hormones, feedback and common endocrine disorders.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 2/5
A hormone released from a gland on the dorsal side of the forebrain helps coordinate daily timing and also influences pigmentation and the menstrual cycle. Which gland-hormone pair fits this description?
- A. Hypothalamus and thyrotropin-releasing hormone
- B. Thyroid and thyrocalcitonin
- C. Adenohypophysis and thyroid-stimulating hormone
- D. Pineal gland and melatonin
Example 3 · difficulty 2/5
A person repeatedly receives intense light during the usual dark phase and then finds that the normal timing of sleep and waking is disturbed. Which endocrine signal is most directly associated with this altered 24-hour pattern?
- A. Melatonin from the pineal gland
- B. Thyrocalcitonin from the thyroid gland
- C. Thyroxine from thyroid follicles
- D. Thyroid-stimulating hormone from the pituitary
The evidence-first practice loop
- 1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
- 2. Attempt closed-bookExpose the concept or execution gap before rereading.
- 3. Repair and returnClassify the miss and re-practice after a delay.
Canonical chapter practice
Frequently asked questions
Are these official NEET 2026 Biology Chemical Coordination and Integration PYQs?
No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.
How should I use the NEET 2026 paper?
Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.