This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 17 Breathing And Exchange Of Gases – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Asthma may be attributed to: A) Bacterial infection of the lungs. B) Allergic reaction of the mast cells in the lungs. C) Inflammation of the trachea. D) Accumulation of fluid in the lungs. Show Answer Correct Answer: B) Allergic reaction of the mast cells in the lungs. 2. Which of the following is NOT the structure of haemoglobin? A) Each haemoglobin molecule contains 4 haem group. B) Haemoglobin is a quaternary structure. C) Every each haem group in haemoglobin can bind with 4 molecule of oxygen. D) Each haemoglobin has 2 $\alpha$-chain and 2 $\beta$-chain polypeptide subunits. Show Answer Correct Answer: C) Every each haem group in haemoglobin can bind with 4 molecule of oxygen. 3. Which is the site of actual diffusion of O2 and CO2 between blood and atmospheric air: A) Exchange part of respiratory system. B) Conducting part of respiratory system. C) Respiratory part of respiratory system. D) Both a and c. Show Answer Correct Answer: D) Both a and c. 4. Body surface participates in exchange of gases in which of the following organisms A) Sponges, hydra, insects. B) Sponges, earthworm, spiders. C) Coelentrates, flatworms, aquatic arthropods. D) Sponges, coelenterates, flatworm. Show Answer Correct Answer: D) Sponges, coelenterates, flatworm. 5. Transport of carbon dioxide from tissue to respiratory surface is by A) Blood plasma and RBC. B) Blood plasma. C) RBC. D) RBC and WBC. Show Answer Correct Answer: A) Blood plasma and RBC. 6. What is chloride shift? A) Movement of chloride ion from RBC to plasma. B) Movement of chloride ion from plasma to WBC. C) Movement of chloride ion from plasma to RBC. D) Movement of chloride ion from WBC to plasma. Show Answer Correct Answer: C) Movement of chloride ion from plasma to RBC. 7. People who have migrated from the planes to an area adjoining Rohtang pass about six months back ..... A) Have more RBCs and their haemoglobin has a lower binding affinity to O2. B) Are not physically fit to play games like football. C) Suffer from altitude sickness with symptoms like nausea, fatigue, etc. D) Have the usual RBC count, but their haemoglobin has very high binding affinity to O2. Show Answer Correct Answer: A) Have more RBCs and their haemoglobin has a lower binding affinity to O2. 8. Visiting high mountains may cause altitude sickness in men living in plain areas. Prime cause of this is A) Decreased efficiency of haemoglobin. B) Decreased partial pressure of oxygen. C) Excess of CO2 in blood. D) Decreased efficiency of red blood cells. Show Answer Correct Answer: B) Decreased partial pressure of oxygen. 9. The conducting part of the respiratory system has functions. A) Filter, warm and moisten the air. B) Gaseous exchange. C) Filtering the air only. D) Warm the air. Show Answer Correct Answer: A) Filter, warm and moisten the air. 10. Volume of air remaining in the lungs even after a forcible expiration is A) Inspiratory capacity. B) Vital Capacity. C) Expiratory capacity. D) Residual volume. Show Answer Correct Answer: D) Residual volume. 11. Which of the following statements about the mechanism of ventilation / breathing is false? A) As the diaphragm relaxes, air is expelled from the respiratory system. B) During inspiration the lungs act as suction pump. C) Inspiration is a passive and expiration is an active process. D) For quiet breathing external intercostal muscles and diaphragm play an important role. Show Answer Correct Answer: C) Inspiration is a passive and expiration is an active process. 12. Which gas is primarily transported by hemoglobin in red blood cells? A) Oxygen. B) Nitrogen. C) Hydrogen. D) Carbon Dioxide. Show Answer Correct Answer: A) Oxygen. 13. Where is the HHb present? A) Blood surrounding tissues cells. B) At the respiratory surface in RBC of blood. C) Blood plasma surrounding tissue. D) Respiratory surface blood plasma. Show Answer Correct Answer: B) At the respiratory surface in RBC of blood. 14. Part of brain responsible for Inspiration A) Pons. B) Alveoli. C) Medulla. D) Thalamus. Show Answer Correct Answer: C) Medulla. 15. Assertion:The lungs are situated in thoracic chamber which is anatomically an air-tight chamber.Reason:Such an arrangement is essential to avoid any change in pulmonary volume. A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion. B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion. C) If Assertion is true but Reason is false. D) If both Assertion and Reason are false. Show Answer Correct Answer: C) If Assertion is true but Reason is false. 16. Carbon monoxide has greater affinity for haemoglobin as compared to oxygen ..... A) 20 times. B) 2 times. C) 200 times. D) 1000 times. Show Answer Correct Answer: C) 200 times. 17. Which addictive component of tobacco smoke causes an increase in blood pressure? A) Nicotine. B) Tar. C) Carbon monoxide. D) Carcinogens. Show Answer Correct Answer: A) Nicotine. 18. If the tidal volume is 500 ml and dead space volume is 150 ml .What will be the alveolar ventilation per minute? A) 4200-5600 ml. B) 2500-3000ml. C) 3400 ml. D) 6000-8000ml. Show Answer Correct Answer: A) 4200-5600 ml. 19. The maximum volume of air a person can breathe in after a forced expiration is known as: A) Vital Capacity. B) Inspiratory Capacity. C) Total Lung Capacity. D) Expiratory Capacity. Show Answer Correct Answer: A) Vital Capacity. 20. A section of an alveolus with a pulmonary capillary indicates the presence of major layers constituting diffusion membrane- A) 10. B) 3. C) 6. D) 2. Show Answer Correct Answer: B) 3. 21. The maximum volume of air you can forcefully exhale after taking the deepest possible breath is called A) Tidal volume. B) Vital capacity. C) Residual volume. D) Total respiratory volume. Show Answer Correct Answer: B) Vital capacity. 22. Mark the true statement among the following with reference to normal breathing. A) Inspiration is a passive process whereas expiration is active. B) Inspiration is a active process whereas expiration is passive. C) Inspiration and expiration are active processes. D) Inspiration and expiration are passive processes. Show Answer Correct Answer: B) Inspiration is a active process whereas expiration is passive. 23. The tissue respiration refers to: A) Inspiration. B) Internal respiration. C) External respiration. D) Expiration. Show Answer Correct Answer: B) Internal respiration. 24. The affinity of Hb for O$_{2}$ is A) Decreased at more basic than normal pH. B) Increased at higher body temperature. C) Increase at higher than normal 2, 3 DPG levels. D) Decreased in metabolizing tissue. Show Answer Correct Answer: D) Decreased in metabolizing tissue. 25. Total volume of lungs: A) 5L. B) 4L. C) 6L. D) 5.5L. Show Answer Correct Answer: C) 6L. 26. What is the primary function of blood in relation to O2 and CO2? A) Transport of nutrients. B) Regulation of body temperature. C) Defense against infections. D) Transport of O2 and CO2. Show Answer Correct Answer: D) Transport of O2 and CO2. 27. Trachea is internally lined by A) Cilliated epithelium. B) Cilliated columnar epithelium. C) Both. D) None. Show Answer Correct Answer: B) Cilliated columnar epithelium. 28. Right primary trachea is divided into ..... secondary trachea A) 3. B) 8. C) 2. D) 10. Show Answer Correct Answer: A) 3. 29. When temperature decreases, oxy-Hb curve becomes A) More steep. B) Straight. C) Parabola. D) None of these. Show Answer Correct Answer: A) More steep. 30. Whether a child died after birth or died before birth can be confirmed by measuring: A) Residual volume. B) Dead space volume. C) Tidal volume. D) Weight of child. Show Answer Correct Answer: A) Residual volume. 31. CO$_{2}$ dissociates from carbaminohaemoglobin when A) PCO$_{2}$ is high and pO$_{2}$ is low. B) PO$_{2}$ is high and pCO$_{2}$ is low. C) PCO$_{2}$ and pO$_{2}$ are equal. D) None of the above. Show Answer Correct Answer: B) PO$_{2}$ is high and pCO$_{2}$ is low. 32. What is the reversible form of O2 when it binds with haemoglobin? A) Carboxyhaemoglobin. B) Oxyhaemoglobin. C) Methaemoglobin. D) Deoxyhaemoglobin. Show Answer Correct Answer: B) Oxyhaemoglobin. 33. Trachea divides into right and left primary bronchi at ..... th thoracic vertebra. A) 6. B) 5. C) 9. D) 4. Show Answer Correct Answer: B) 5. 34. What is proper for left bronchus compared to right bronchus? A) Narrow. B) Most straight. C) Short. D) B and c. Show Answer Correct Answer: A) Narrow. 35. If P$_{atm}$ = 0 mm Hg and P$_{alv}$ =-2 mm Hg, then A) It is the end of the normal inspiration and there is no airflow. B) It is the end of the normal expiration and there is no airflow. C) Transpulmonary pressure (P$_{tp}$) is-2 mm Hg. D) Air is flowing into the lungs. Show Answer Correct Answer: D) Air is flowing into the lungs. 36. A person has vital capacity of 5L and residual volume of 1.2 L. Total lung capacity- A) 6.2 L. B) 4.8 L. C) 500 ml. D) None. Show Answer Correct Answer: A) 6.2 L. 37. All of the following favour the dissociation of oxyhaemoglobin to deliver O$_{2}$ to tissues except- A) PO2 = $\uparrow$. B) Temperature = $\uparrow$. C) PO2 = $\updownarrow$. D) PCO2 = $\uparrow$ $\uparrow$. Show Answer Correct Answer: A) PO2 = $\uparrow$. 38. Inhale!!!My lungs ..... A) Got Smaller. B) Got Bigger. C) All the above. D) None of the above. Show Answer Correct Answer: B) Got Bigger. 39. Exchange of gases between alveoli and blood occurs by A) Active transport. B) Facilitated transport. C) Co-transport. D) Diffusion. Show Answer Correct Answer: D) Diffusion. 40. The part that helps reducing the friction on the lung surface A) Peura. B) Ribs. C) Pleura. D) Diaphragm. Show Answer Correct Answer: C) Pleura. 41. Among the following the partial pressure of oxygen is maximum in A) Venous blood. B) Alveolar air. C) Expired air. D) Arterial blood. Show Answer Correct Answer: C) Expired air. 42. What is the primary gas exhaled by humans during respiration? A) Hydrogen. B) Oxygen. C) Carbon Dioxide. D) Nitrogen. Show Answer Correct Answer: C) Carbon Dioxide. 43. What amount of carbon dioxide is delivered by every 100 ml of deoxygenated blood t the alveoli ..... ? A) 5ml. B) 4 ml. C) 20 ml. D) 15 ml. Show Answer Correct Answer: B) 4 ml. 44. During expiration, the diaphragm becomes A) Normal. B) Oblique. C) Dome-shaped. D) Flattened. Show Answer Correct Answer: C) Dome-shaped. 45. Which of the following is true about formation of oxyhemoglobin? A) It forms when pO$_{2}$ is low and dissociates when pCO$_{2}$ is low. B) It forms when pO$_{2}$ is low and dissociates when pCO$_{2}$ is high. C) It forms when pO$_{2}$ is high and dissociates when pCO$_{2}$ is high. D) It forms when pO$_{2}$ is high and dissociates when pCO$_{2}$ is low. Show Answer Correct Answer: C) It forms when pO$_{2}$ is high and dissociates when pCO$_{2}$ is high. 46. RESPIRATION IN FISH IS CALLED A) CUTANEOUS RESPIRATION. B) BRANCHIAL RESPIRATION. C) PULMONARY RESPIRATION. D) AQUATIC RESPIRATION. Show Answer Correct Answer: B) BRANCHIAL RESPIRATION. 47. Which of the following best describes the respiring tissues? A) PO$_{2}$ is high and pCO$_{2}$ is high. B) PO$_{2}$ is high and pCO$_{2}$ is low. C) PO$_{2}$ is low and pCO$_{2}$ is low. D) PO$_{2}$ is low and pCO$_{2}$ is high. Show Answer Correct Answer: D) PO$_{2}$ is low and pCO$_{2}$ is high. 48. What's the job of the diaphragm? A) To control breathing. B) To clear the lungs of toxins. C) To give hiccups. D) To support the ribs. Show Answer Correct Answer: A) To control breathing. 49. Assertion:If there is no air in trachea, it will not collapse.Reason:Trachea is having the cartilagenous ring. A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion. B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion. C) If Assertion is true but Reason is false. D) If both Assertion and Reason are false. Show Answer Correct Answer: A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion. 50. Which structure of man is similar to spiracle of cockroach? A) Lung. B) Alveolus. C) Nostril. D) Bronchiole. Show Answer Correct Answer: C) Nostril. 51. Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of: A) Expiratory Reserve Volume. B) Inspiratory Reserve Volume. C) Residual Volume. D) Tidal Volume. Show Answer Correct Answer: C) Residual Volume. 52. Newt has two organ breathing which are ..... and ..... A) Lungs and gills. B) Spiracle and moist skin. C) Lungs and moist skin. D) Lungs and spiracle. Show Answer Correct Answer: C) Lungs and moist skin. 53. Which gas is primarily inhaled by humans during respiration? A) Helium. B) Nitrogen. C) Carbon Dioxide. D) Oxygen. Show Answer Correct Answer: D) Oxygen. 54. Hemoglobin that is bonded to carbon monoxide and therefore cannot transport oxygen, is called ..... ? A) Carboxyhemoglobin. B) Reduced hemoglobin. C) Carbamino hemoglobin. D) Metemoglobin. Show Answer Correct Answer: A) Carboxyhemoglobin. 55. Most common mode of respiration in frog: A) Pulmonary respiration. B) Cutaneous respiration. C) Buccopharyengeal respiration. D) Branchial respiration. Show Answer Correct Answer: C) Buccopharyengeal respiration. 56. Which of the following parts are involved in the mechanism of breathing? A) Abdominal muscles. B) Diaphragm. C) Intercostal muscles. D) All of these. Show Answer Correct Answer: D) All of these. 57. CO2 in the blood lowers the pH because CO2 combines with ..... , and the reaction rate increases ..... A) H2O only forms H+ ions, carbon. B) H+ to form HCO3-, oxyhemoglobin. C) H2O to form H+ and HCO3-, carbonic anhydrase. D) H2O forms only HCO3-, carbonic anhydrase. Show Answer Correct Answer: C) H2O to form H+ and HCO3-, carbonic anhydrase. 58. The respiratory centre in the brain is stimulated by A) CO2 concentration in arterial blood. B) O2 concentration in arterial blood. C) O2 concentration in venous blood. D) CO2 concentration in venous blood. Show Answer Correct Answer: A) CO2 concentration in arterial blood. 59. Why do human beings have difficulty breathing at high elevations? A) The temperature is lower there. B) The barometric pressure is higher there. C) O$_{2}$ makes up lower percentage of air there. D) PO$_{2}$ is lower there. Show Answer Correct Answer: D) PO$_{2}$ is lower there. 60. Amphibia does not respire using A) Skin. B) Lungs. C) Gills. D) None. Show Answer Correct Answer: D) None. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 1Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 2Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 3Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 5Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 6Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 7Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 8Class 11 Biology Chapter 1 The Living World Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books