Class 11 · Biology
Breathing and Exchange of Gases NEET Questions
100 verified questionsNCERT chapter mappedFree practiceAutomatic error log
Build recall in Breathing and Exchange of Gases through active solving. This bank covers the complete chapter with original NEET-style MCQs, worked explanations and chapter-level NCERT provenance—without pretending original questions are previous-year questions.
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Three examples from the live 100-question bank. Answers appear after attempting them in practice mode.
Example 1 · difficulty 1/5
The human trachea is held open by C-shaped cartilaginous rings that are incomplete dorsally. The most appropriate reason for this incomplete (C-shaped) arrangement is that it:
- A. allows the ciliated epithelium to beat freely over the entire circumference
- B. permits the trachea to collapse completely during forced expiration
- C. keeps the airway patent while allowing the adjacent oesophagus to bulge during swallowing
- D. enables the rings to secrete surfactant that lowers surface tension
Example 2 · difficulty 2/5
Alveolar air has a pO₂ of about 104 mm Hg, while the deoxygenated blood reaching the alveolar capillaries has a pO₂ of about 40 mm Hg. As a direct consequence of this gradient:
- A. oxygen diffuses from the alveoli into the capillary blood until it equilibrates near 95 mm Hg
- B. oxygen is pumped from the capillaries into the alveoli by active transport
- C. carbon dioxide simultaneously diffuses from the alveoli into the blood
- D. oxygen remains confined to the alveoli because the respiratory membrane is impermeable to gases
Example 3 · difficulty 2/5
Of the total carbon dioxide carried by human blood, the largest share is transported:
- A. physically dissolved in the plasma
- B. bound to the globin portion of haemoglobin as carbaminohaemoglobin
- C. as stable carbonic acid circulating in the plasma
- D. as bicarbonate ions, mostly delivered to plasma after forming inside RBCs
The chapter mastery loop
- 1. Attempt firstExpose recall gaps before rereading.
- 2. Classify the missConcept, careless, rushed or guessed.
- 3. Re-practiceReturn until the error pattern disappears.
Frequently asked questions
How many Breathing and Exchange of Gases NEET questions are available?
NeetVellum publishes 100 verified questions for this chapter. Free accounts use the daily UG quota; UG Pro removes it.
How should I revise Breathing and Exchange of Gases for NEET?
Attempt questions before rereading, classify each miss, revisit the exposed NCERT concept, then re-practice until the error pattern disappears.