NCERT/Class 11/Biology/Breathing and Exchange of Gases

Breathing and Exchange of Gases

Class 11 · Biology

100 questions40 easy41 medium19 hard

Sample Questions

Q1.The importance of carbonic anhydrase being present in both RBCs and plasma (in minute quantities) is that:

  • AIt allows bicarbonate formation only in RBCs
  • BIt enables CO2 conversion in both compartments, maximising CO2 transport as bicarbonate
  • CIt only functions in the plasma
  • DIt transports O2 exclusively

Q2.Residual volume is the volume of air:

  • AInspired during normal breathing
  • BRemaining in the lungs after forcible expiration
  • CExpired during normal breathing
  • DRemaining after normal expiration

Q3.The pCO2 in atmospheric air is approximately:

  • A40 mm Hg
  • B45 mm Hg
  • C0.3 mm Hg
  • D95 mm Hg

Q4.The partial pressure of O2 in the alveoli is approximately:

  • A40 mm Hg
  • B95 mm Hg
  • C104 mm Hg
  • D159 mm Hg

Q5.Which of the following organisms use moist cuticle for gas exchange?

  • AEarthworms
  • BInsects
  • CFishes
  • DBirds

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
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Concepts Covered

Carbonic Anhydrase and BicarbonateConducting and Exchange PartsDiffusion MembraneDisorders of the Respiratory SystemExchange of Gases and Partial PressureHuman Respiratory System AnatomyMechanism of BreathingOxygen Dissociation CurveRegulation of RespirationRespiratory CapacitiesRespiratory Organs in Different OrganismsRespiratory VolumesTransport of Carbon DioxideTransport of Oxygen

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