{"id":18056,"date":"2022-05-30T22:00:12","date_gmt":"2022-05-30T16:30:12","guid":{"rendered":"https:\/\/mcq-questions.com\/?p=18056"},"modified":"2022-05-19T12:23:49","modified_gmt":"2022-05-19T06:53:49","slug":"mcq-questions-for-class-11-biology-chapter-17","status":"publish","type":"post","link":"https:\/\/mcq-questions.com\/mcq-questions-for-class-11-biology-chapter-17\/","title":{"rendered":"MCQ Questions for Class 11 Biology Chapter 17 Breathing and Exchange of Gases with Answers"},"content":{"rendered":"

Students are advised to practice the NCERT MCQ Questions for Class 11 Biology Chapter 17 Breathing and Exchange of Gases with Answers Pdf free download is available here. MCQ Questions for Class 11 Biology with Answers<\/a> are prepared as per the Latest Exam Pattern. Students can solve these Breathing and Exchange of Gases Class 11 MCQs Questions with Answers and assess their preparation level.<\/p>\n

Breathing and Exchange of Gases Class 11 MCQs Questions with Answers<\/h2>\n

Solving the Breathing and Exchange of Gases Multiple Choice Questions of Class 11 Biology Chapter 17 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Breathing and Exchange of Gases Class 11 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 17 Biology Class 11 and cross-check your answers during preparation.<\/p>\n

I. Select the correct answers from the following questions:<\/span><\/p>\n

Question 1.
\nWhich of the following is not a step in the process of respiration?
\n(a) Breathing
\n(b) Diffusion of oxygen from blood to tissues
\n(c) Production of energy
\n(d) Diffusion of oxygen from tissues to blood<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Breathing<\/p>\n<\/details>\n

\n

Question 2.
\nThe atmosphere contains CO2<\/sub> by volume
\n(a) 0.1%
\n(b) 0.5%
\n(c) 0.03%
\n(d) 0.3%<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) 0.03%<\/p>\n<\/details>\n

\n

Question 3.
\nSudden deep inspiration is due to
\n(a) Increase in concentration of O2<\/sub>
\n(b) Increase in concentration of CO2<\/sub>
\n(c) Decrease in concentration of CO2<\/sub>
\n(d) Decrease in concentration of CO2<\/sub><\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Increase in concentration of CO2<\/sub><\/p>\n<\/details>\n

\n

Question 4.
\nA man respires about
\n(a) 40 times per minute
\n(b) 72 times per minute
\n(c) 12-16 times per minute
\n(d) 100 times per minute<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) 12-16 times per minute<\/p>\n<\/details>\n

\n

Question 5.
\nIn which form CO2<\/sub> is carried in blood
\n(a) Sodium bicarbonate
\n(b) Sodium carbonate
\n(c) Potassium bicarbonate
\n(d) Potassium carbonate<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) Potassium carbonate<\/p>\n<\/details>\n

\n

Question 6.
\nIn man, gas exchange between the environment and the body takes place in
\n(a) Bronchi
\n(b) Larynx
\n(c) Alveoli
\n(d) Trachea<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Alveoli<\/p>\n<\/details>\n

\n

Question 7.
\nInspiration would not occur if the
\n(a) Diaphragm is elevated
\n(b) Diaphragm is lowered
\n(c) Ribs are elevated
\n(d) Ribs are elevated and diaphragm is lowered<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Diaphragm is elevated<\/p>\n<\/details>\n

\n

Question 8.
\nWhich one of the following does not contribute to the breathing movement in mammals?
\n(a) Abdominal muscles
\n(b) Larynx
\n(c) Ribs
\n(d) Diaphragm<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Ribs<\/p>\n<\/details>\n

\n

Question 9.
\nBreathing centre that controls normal breathing in mammals lies in
\n(a) Mid brain
\n(b) Cerebellum
\n(c) Cerebrum
\n(d) Medulla oblongata<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Mid brain<\/p>\n<\/details>\n

\n

Question 10.
\nIf a person stays on hill for some days:
\n(a) His body will step up production of RBCs
\n(b) His body will step down production of RBCs
\n(c) His RBCs will turn into very large cells
\n(d) No change in the contents of RBCs in the body<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) His body will step up production of RBCs<\/p>\n<\/details>\n

\n

Question 11.
\nThe largest quantity of air that can be expired after a maximal inspiratory effort is
\n(a) Tidal volume
\n(b) Vital capacity of lungs
\n(c) Lung volume
\n(d) Residual volume<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Lung volume<\/p>\n<\/details>\n

\n

Question 12.
\nWhich of the following facts suggests that O2<\/sub> is transported from lungs to the tissues combined with haemoglobin rather than dissolved in blood plasma:
\n(a) Oxyhaemoglobin can dissociate into haemoglobin and O2<\/sub>
\n(b) An increase in CO2<\/sub> concentration decreases the O2<\/sub> affinity of haemoglobin
\n(c) Haehaemoglobin can combine with O2<\/sub>
\n(d) O2<\/sub> carrying capacity of whole blood is higher than that of plasmsa and O2<\/sub> content of blood leaving the lungs is greater than that of blood entering the lungs.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) O2<\/sub> carrying capacity of whole blood is higher than that of plasma and O2<\/sub> content of blood leaving the lungs is greater than that of blood entering the lungs.<\/p>\n<\/details>\n

\n

Question 13.
\nIf a man from sea coast of Mumbai goes to Mount Everest:
\n(a) His breathing rate and heart beat will increase
\n(b) His breathing rate and heart beat will decrease
\n(c) His breathing rate will increase, but heart beat will decrease
\n(d) His breathing rate will decrease, but heart beat will increase.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) His breathing rate and heart beat will increase<\/p>\n<\/details>\n

\n

Question 14.
\nBody tissues obtain oxygen from oxyhaemoglobin because of its dissociation caused by
\n(a) Low CO2<\/sub> concentration
\n(b) Low O2<\/sub> and high CO3<\/sub> concentration
\n(c) High CO2<\/sub> concentration
\n(d) Low oxygen concentration<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Low O2<\/sub> and high CO2<\/sub> concentration<\/p>\n<\/details>\n

\n

Question 15.
\nLungs are covered by
\n(a) Perichondrium
\n(b) Pleura
\n(c) Periosteum
\n(d) Pericardium<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) Pericardium<\/p>\n<\/details>\n

\n

Question 16.
\nTidal air is
\n(a) Total air taken into lungs
\n(b) Air that comes in and goes out in normal breathing
\n(c) Air inhaled in deep breathing
\n(d) Air expelled forcibly after normal inspiration<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Air that comes in and goes out in normal breathing<\/p>\n<\/details>\n

\n

Question 17.
\nLung lobes of human being are
\n(a) 2 left and 3 right
\n(b) 3 in each
\n(c) 2 in each
\n(d) 3 left and 2 right<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) 2 left and 3 right<\/p>\n<\/details>\n

\n

Question 18.
\nBody cavity is divided into thoracic
\n(a) Heart
\n(b) Liver
\n(c) Lungs
\n(d) Diaphragm<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) Diaphragm<\/p>\n<\/details>\n

\n

Question 19.
\nBreathing becomes faster in fever because
\n(a) Fever stimulates the respiratory centre of the man
\n(b) Oxygen carrying capacity of blood becomes lower
\n(c) Oxygen is used in fighting germs
\n(d) Increase in temperature increases metabolic rate requiring more oxygen<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) Increase in temperature increases metabolic rate requiring more oxygen<\/p>\n<\/details>\n

\n

Question 20.
\nExcess of water absorbed by human being is passed out in urine. Other sources is
\n(a) Inspiration
\n(b) Expiration
\n(c) Defaecation
\n(d) Salivation<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Expiration<\/p>\n<\/details>\n

\n

Question 21.
\nExchange of gases between the blood and the tissue of the body is called
\n(a) Internal respiration
\n(b) Cellular respiration
\n(c) External respiration
\n(d) Counter current exchange<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Internal respiration<\/p>\n<\/details>\n

\n

Question 22.
\nRespiration involves in which following step:
\n(a) Transport of gases by the blood
\n(b) Diffusion of O2<\/sub> and CO2<\/sub> between the blood and the tissues
\n(c) Diffusion of gases (O2<\/sub> and CO2<\/sub>) across alveolar membrane.
\n(d) All of these functions.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) All of these functions.<\/p>\n<\/details>\n

\n

II. Fill in the blanks:<\/span><\/p>\n

Question 1.
\nThis process of exchange exchange of O2<\/sub> from the atmosphere with CO2<\/sub> produced by the cells is called …………… commonly known as …………….<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: breathing, respiration<\/p>\n<\/details>\n

\n

Question 2.
\n…………… use their moist cuticle for respiration.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Earthworms<\/p>\n<\/details>\n

\n

Question 3.
\nAmong vertebrates, fishes respire through gills wheres ………….. and ………….. and ……………. use …………….<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: reptiles, birds, mammals, lungs<\/p>\n<\/details>\n

\n

Question 4.
\n…………… like …………… can respire through their moist skin also.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Nasopharynsx, frogs<\/p>\n<\/details>\n

\n

Question 5.
\nThe nasal chamber opens into …………… which is a portion of pharyax, the common passage for ………….. and …………..<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: nasopharynx, food, air<\/p>\n<\/details>\n

\n

Question 6.
\nNasopharynx opens through glottis of the larynx region into the ……………..<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: trachea<\/p>\n<\/details>\n

\n

Question 7.
\nThe lungs are situated in the thoracic chamber which is anatomically an ………………<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: air-tight chamber<\/p>\n<\/details>\n

\n

Question 8.
\nBreathing involves two stages: ……………… during which atmospheric air is drawn in and ……………. by which the alveolar air is released out.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: inspiration, expiration<\/p>\n<\/details>\n

\n

Question 9.
\nOn an average, a healthy human respires …………….. times\/minute.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: 12-16<\/p>\n<\/details>\n

\n

Question 10.
\nTotal ……………. of air a person can inspire after a normal …………….<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Volume, expiration<\/p>\n<\/details>\n

\n

Question 11.
\nVolume of air that will remain in the ………… after a normal expiration. This includes ……………<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: lungs, ERV+RV<\/p>\n<\/details>\n

\n

Question 12.
\n………….. and ……………. are exchanged in these sites by simple diffusion mainly based on pressure\/concentration gradient.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: O2<\/sub>, CO2<\/sub><\/p>\n<\/details>\n

\n

Question 13.
\nAll the factors in our body are favourable for diffusion of ……………. from alveoli to tissues and that of ……………\u00a0from tissues to alveoli.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: O2<\/sub>, CO2<\/sub><\/p>\n<\/details>\n

\n

Question 14.
\nAbout ………….. of CO2<\/sub> is carried in a dissolved state through ………….<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: 7 percent, plasma<\/p>\n<\/details>\n

\n

Question 15.
\nO2<\/sub> can bind with haemoglobin in a reversible manner to form ……………….<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: oxvhaemoglobin<\/p>\n<\/details>\n

\n

III. Mark the statment True (T) or False (F)<\/span><\/p>\n

Question 1.
\nEach haemoglobin molecule can carry a maximum of four molecules of O2<\/sub>.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True.<\/p>\n<\/details>\n

\n

Question 2.
\nO2<\/sub> is carried by haemoglobin as carbamino-haemoglobin (about 25-20 percent).<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: False.<\/p>\n<\/details>\n

\n

Question 3.
\nEvery 10 mL of oxygenated blood can deliver around 10 ml of O2<\/sub> to the tissues under normal physiological conditions.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: False<\/p>\n<\/details>\n

\n

Question 4.
\nIn the alveoli, where there is low pO2<\/sub>, high pCO2<\/sub>, higher H+<\/sup> concentration and lesser temperature.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: False<\/p>\n<\/details>\n

\n

Question 5.
\nEvery 100mL of deoxygenated blood delivers approximately 4 ml of CO2<\/sub> to the alveoli.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 6.
\nThe role of oxygen in the regulation of respiratory rhythm is quite insignificant.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 7.
\nAsthma is a difficulty in breathing causing wheezing due to inflammation of bronchi and bronchioles.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 8.
\nIn certain industries, especially those involving grinding or stone\u00acbreaking, so much dust is produced that the defence mechanism of the body cannot fully cope with.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 9.
\nEmphysema is a chronic disorder in which alveolar walls are damaged due to which respiratory surface is decreased. One of the major causes of this is cigarette smoking.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 10.
\nThe first step in respiration is breathing by which atmospheric air is taken in and the alveolar air is released out.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True.<\/p>\n<\/details>\n

\n

Question 11.
\nIt is approx 800 ml., i.e., a healthy man can inspire or expire approximately 2000 to 8000 ml of air per minute.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: False<\/p>\n<\/details>\n

\n

Question 12.
\nVolume of air remaining in the lungs even after a forcible expiration. This averages-100 mL to 200 mL.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: False<\/p>\n<\/details>\n

\n

IV. Match the items in column I with Column II<\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Column I<\/td>\nColumn II<\/td>\n<\/tr>\n
(a) Tidal volume<\/td>\n1. averages 1000 ml to 1100 ml<\/td>\n<\/tr>\n
(b) RV<\/td>\n2. averages 2500 ml to 3000 ml<\/td>\n<\/tr>\n
(c) ERV<\/td>\n3. TV + IRV<\/td>\n<\/tr>\n
(d) Inspiratory capacity<\/td>\n4. approximately 6000 to 8000 ml of air per minute<\/td>\n<\/tr>\n
(e) IRV<\/td>\n5. averages 1100 ml to 1200 ml<\/td>\n<\/tr>\n
(f) EC<\/td>\n6. pO2<\/sub> for oxygen and pCO2<\/sub> for carbon dioxide<\/td>\n<\/tr>\n
(g) FRC<\/td>\n7. transported by RBC whereas 70 percent of it is carried as bicarbonate.<\/td>\n<\/tr>\n
(h) Vital capacity<\/td>\n8. TV + ERV<\/td>\n<\/tr>\n
(i) Total lung Capacity<\/td>\n9. transported by RBCs in the blood.<\/td>\n<\/tr>\n
(j) Partial pressure<\/td>\n10. for respiration<\/td>\n<\/tr>\n
(k) About 97 percent of O2<\/sub> is<\/td>\n11. called lungs<\/td>\n<\/tr>\n
(l) Nearly, 20-25 percent of CO2<\/sub> is<\/td>\n12. ERV + RV<\/td>\n<\/tr>\n
(m) Gills<\/td>\n13. This includes RV, ERV, TV and IRV<\/td>\n<\/tr>\n
(n) Vascularised bags<\/td>\n14. This includes ERV, TV and IRV<\/td>\n<\/tr>\n
(o) Larynx is a cartilaginous box<\/td>\n15. Sound box<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\nAnswer<\/span><\/summary>\n

Answer:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Column I<\/td>\nColumn II<\/td>\n<\/tr>\n
(a) Tidal volume<\/td>\n4. approximately 6000 to 8000 ml of air per minute<\/td>\n<\/tr>\n
(b) RV<\/td>\n5. averages 1100 ml to 1200 ml<\/td>\n<\/tr>\n
(c) ERV<\/td>\n1. averages 1000 ml to 1100 ml<\/td>\n<\/tr>\n
(d) Inspiratory capacity<\/td>\n3. TV + IRV<\/td>\n<\/tr>\n
(e) IRV<\/td>\n2. averages 2500 ml to 3000 ml<\/td>\n<\/tr>\n
(f) EC<\/td>\n8. TV + ERV<\/td>\n<\/tr>\n
(g) FRC<\/td>\n12. ERV + RV<\/td>\n<\/tr>\n
(h) Vital capacity<\/td>\n14. This includes ERV, TV and IRV<\/td>\n<\/tr>\n
(i) Total lung Capacity<\/td>\n13. This includes RV, ERV, TV and IRV<\/td>\n<\/tr>\n
(j) Partial pressure<\/td>\n6. pO2<\/sub> for oxygen and pCO2<\/sub> for carbon dioxide<\/td>\n<\/tr>\n
(k) About 97 percent of O2<\/sub> is<\/td>\n9. transported by RBCs in the blood.<\/td>\n<\/tr>\n
(l) Nearly, 20-25 percent of CO2<\/sub> is<\/td>\n7. transported by RBC whereas 70 percent of it is carried as bicarbonate.<\/td>\n<\/tr>\n
(m) Gills<\/td>\n10. for respiration<\/td>\n<\/tr>\n
(n) Vascularised bags<\/td>\n11. called lungs<\/td>\n<\/tr>\n
(o) Larynx is a cartilaginous box<\/td>\n15. Sound box<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/details>\n
\n

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Students are advised to practice the NCERT MCQ Questions for Class 11 Biology Chapter 17 Breathing and Exchange of Gases with Answers Pdf free download is available here. MCQ Questions for Class 11 Biology with Answers are prepared as per the Latest Exam Pattern. Students can solve these Breathing and Exchange of Gases Class 11 …<\/p>\n

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