Breathing and Exchange of Gases NEET PYQs (1990–2026)

Solved Breathing and Exchange of Gases PYQs

3 recent questions with answers. The full set of 71 is free to practise.

1. NEET 2026HardMechanism of breathing
   Q1

   Match List-I with List-II:
   
   List-I (Respiratory Volume):
   
   A. ERV (Expiratory Reserve Volume),
   
   B. RV (Residual Volume),
   
   C. IRV (Inspiratory Reserve Volume),
   
   D. TV (Tidal Volume)
   
   List-II (Capacity in mL):
   
   I. 2500 -- 3000 mL,
   
   II. 500 mL,
   
   III. 1000 -- 1100 mL,
   
   IV. 1100 -- 1200 mL
   
   Choose the correct answer from the options given below:

   • AA-III, B-IV, C-I, D-II
   • BA-III, B-I, C-IV, D-II
   • CA-I, B-III, C-II, D-IV
   • DA-I, B-II, C-III, D-IV

   Show answer & solution

   Correct answer: (A)

   ERV ~ 1000-1100 mL (III); RV ~ 1100-1200 mL (IV); IRV ~ 2500-3000 mL (I); TV ~ 500 mL (II). So A-III, B-IV, C-I, D-II.
2. NEET 2026EasyRespiratory organs in animals
   Q2

   In water, frogs respire using ______.

   • Askin
   • Bbuccal cavity
   • Clungs
   • Dtrachea

   Show answer & solution

   Correct answer: (A)

   Frogs respire through skin in water.
3. NEET 2026MediumTransport of oxygen and carbon dioxide
   Q3

   Select the correct sequence of experiments that led to a gradual understanding of photosynthesis in green plants.

   • AAbsorption spectra of chlorophyll a and b → production
     
     of glucose → release of oxygen → role of air
   • BRole of air → release of oxygen → production of glucose
     
     → absorption spectra of chlorophyll a and b
   • CRelease of oxygen → production of glucose → absorption
     
     spectra of chlorophyll a and b → role of air
   • DProduction of glucose → role of air → release of oxygen
     
     → absorption spectra of chlorophyll a and b

   Show answer & solution

   Correct answer: (B)

   Historical sequence: Priestley (role of air) → Ingenhousz (release of oxygen) → Sachs (production of glucose) → Emerson (absorption spectra).
   
   So role of air → release of oxygen → production of glucose → absorption spectra.

Topic-wise question count

Where NEET has asked from Breathing and Exchange of Gases, most frequent first.

• Transport of oxygen and carbon dioxide24
• Mechanism of breathing19
• Regulation of respiration and disorders17
• Human respiratory system structure6
• Respiratory organs in animals5

Year-wise Breathing and Exchange of Gases questions in NEET

Number of questions from this chapter in each year's paper(s).