Example 1 · difficulty 2/5
About what fraction of oxygen is transported bound to haemoglobin?
- A. About 3%
- B. About 97%
- C. About 20%
- D. About 70%
2023 source guide · Biology
NEET 2023 Biology Breathing and Exchange of Gases Questions
Connect the official 2023 paper with current Biology practice without labelling original previews as PYQs.
150 original questions · explicit provenance labels
BiologyPlate 22
NeetVellum atlas · fig. biology
22
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
A right shift of the oxyhaemoglobin dissociation curve means:
- A. higher affinity and less unloading
- B. complete loss of haemoglobin
- C. lower haemoglobin affinity and easier O₂ unloading
- D. higher alveolar PO₂ only
Example 3 · difficulty 3/5
The Bohr effect refers to:
- A. conversion of O₂ into CO₂
- B. transport of CO₂ only as bicarbonate
- C. binding of nitrogen to haemoglobin
- D. reduced haemoglobin affinity for O₂ when CO₂/H⁺ rises
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 2023 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 2023 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.