Example 1 · difficulty 2/5
The basic respiratory rhythm is generated mainly in the:
- A. cerebellum
- B. hypothalamus only
- C. spinal sensory ganglion
- D. medullary respiratory centre
2025 source guide · Biology
NEET 2025 Biology Breathing and Exchange of Gases Questions
Use this page to connect the official 2025 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
ventilation, gas exchange, transport and respiratory regulation.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 3/5
The most important normal chemical stimulus for breathing is usually:
- A. rise in CO₂ and H⁺
- B. small rise in arterial O₂
- C. rise in nitrogen
- D. fall in body mass
Example 3 · difficulty 2/5
Asthma primarily involves:
- A. destruction of all alveolar walls only
- B. inflammation and narrowing of airways
- C. fluid in pleural cavity only
- D. loss of haemoglobin iron
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 2025 Biology Breathing and Exchange of Gases 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 2025 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.