NEET Biology Past Paper (Breathing & Exchange of Gases) PDF

SUBJECT: NEET-Biology COURSE: Master Pro ELP NO.- 01 to 06 Topic – (Breathing and Exchange of Gases) ELP-01 1. The last product of respiration to obtain energy in an...

SUBJECT: NEET-Biology COURSE: Master Pro ELP NO.- 01 to 06 Topic – (Breathing and Exchange of Gases) ELP-01 1. The last product of respiration to obtain energy in animals? (1) CO2 (2) Alcohol (3) O2 (4) Lactic acid 2. Pulmonary respiration is found in (1) Reptiles (2) Aves (3) Mammals (4) All of these 3. Respiration is helpful in (1) Removing waste from the body (2) Producing energy within the body (3) Production of proteins (4) Production of carbohydrates 4. Which of the following shows pulmonary respiration? (1) Sponges (2) Fishes (3) Coelenterates (4) Human 5. Presence of respiratory organ in animal depends on- (1) Habitat and level of organization (2) Habitat only (3) Level of organization only (4) Symmetry in body 6. A respiratory surface must be- (1) Thin (2) Moist (3) Having more surface area (4) All of these 7. Respiratory organs of insects are: - (1) General Body surface (2) Book lungs (3) Lungs (4) Tracheal tubes 8. Match the following and mark the correct options Animal Respiratory Organ A. Earthworm i. Moist cuticle B. Arthropods ii. Gills C. Fishes iii. Lungs D. Birds/Reptiles iv. Trachea Options: (1) A-ii, B-i, C-iv, D-iii (2) A-i, B-iv, C-ii, D-iii (3) A-i, B-iii, C-ii, D-iv (4) A-i, B-ii, C-i.v, D-iii 9. Lower invertebrates like sponges, coelenterates, flatworms, etc., exchange O2 with CO2 by- (1) Simple diffusion though body surface (2) Trachea (3) Lungs (4) Gills 10. Branchial respiration is respiration by- (1) Lungs (2) Gills (3) Trachea (4) Body surface KTN24-B4051 1  ELP-02 1. Trachea terminates in – (1) Bronchi (2) Alveoli (3) Bronchioles (4) Nares 2. Air is breathed in through – (1) Trachea → Lung → Larynx → Pharynx → Alveoli (2) Nose → Larynx → Pharynx → Alveoli → Bronchioles (3) Nostrils → Pharynx → Larynx → Trachea → Bronchi → Bronchioles → Alveoli (4) Nose → Mouth → Lungs 3. Vocal cords occur in – (1) Pharynx (2) Larynx (3) Glottis (4) Bronchial tube 4. Make the correct pairs – Column I Column II P. Bronchus i. Give passage to air toward alveoli Q. Alveoli ii. Give passage to air toward lung R. Bronchioles iii. Give passage to air toward bronchus S. Trachea iv. Perform exchange of air (1) P-ii, Q-iii, R-iv, S-I (2) P-i, Q-iv, R-ii, S-iii (3) P-ii, Q-iv, R-i, S-iii (4) P-i, Q-iii, R-ii, S-iv 5. The trachea is supported by, cartilaginous rings, which are...... shaped. (1) C (2) L (3) O (4) S 6. Sound production in humans is controlled by – (1) Nares (2) Lungs (3) Larynx (4) Pharynx 7. Lungs have a number of alveoli for – (1) Having spongy texture and proper shape (2) More surface area for diffusion of gases (3) More space for increasing volume of inspired air (4) More nerve supply 8. Trachea is lined with incomplete rings of (1) Fibrous cartilage (2) Calcified cartilage (3) Elastic cartilage (4) Hyaline cartilage 9. Which one of the followings is correct regarding larynx? (1) It prevents foreign objects from entering the trachea (2) It houses the vocal cords (3) It is an organ made of cartilage and connects the pharynx to the trachea (4) All of these 10. Which one of the following statements is not correct regarding trachea? (1) It usually lies posterior to the muscular oesophagus (2) It splits into the right and left bronchi to supply air to the lungs (3) Opening to the trachea is covered by epiglottis (4) Tracheal rings are C-shaped KTN24-B4051 2 11. The trachea divides into two smaller tubes called..... (1) Bronchi (2) Alveoli (3) Microtrachea (4) Eustachian tubes 12. Opening of the trachea is covered by a small flap of tissues termed as the........ (1) Glottis (2) Trachea (3) Epiglottis (4) Larynx 13. Larynx is a modified portion of (1) Pharynx (2) Trachea (3) Bronchus (4) Lungs 14. Cartilaginous rings in trachea are incomplete at which surface. (1) Dorsal (2) Ventral (3) Lateral (4) Ventrolateral 15. Wall of alveoli is composed of (1) Simple squamous epithelium (2) Simple cuboidal epithelium (3) Pseudostratified epithelium (4) Simple columnar epithelium ELP-03 1. Thoracic cage of man is formed of (1) Ribs and sternum (2) Ribs, sternum and thoracic vertebrae (3) Ribs, sternum and lumbar vertebrae (4) Ribs and thoracic vertebrae 2. During inspiration (1) Diaphragm and external intercostal muscles relax (2) Diaphragm and internal intercostal muscles relax (3) Diaphragm and external intercostal muscles contract (4) Diaphragm and internal intercostal muscles contract 3. Abdominal breathing refers to (1) Normal breathing (2) Slow breathing (3) Fast breathing (4) Forceful breathing 4. A lung contains many small balloon like air sacs are called- (1) Gas spaces (2) Alveoli (3) Bronchi (4) Bronchioles 5. Intercostal muscles regulate the movement of (1) Ribs (2) Trachea (3) Diaphragm (4) Pharynx 6. The muscles present between ribs are called (1) Phrenic muscles (2) Intercostal muscles (3) Cardiac muscles (4) Voluntary muscles 7. If expiratory reserve volume is 1100 ml residual volume is 1200 ml and tidal volume is 500 ml, what shall be the functional residual capacity (1) 1600 ml (2) 2800 ml (3) 2300 ml (4) 1200 ml 8. Air filled in dead space is (1) 150 cc (2) 350 cc (3) 500 cc (4) 1500 cc 9. Lungs are covered by double walled, membranous bag like structure called (1) Pericardium (2) Peritoneum (3) Pleura (4) Peristalsis 10. Residual volume is: (1) Lesser than tidal volume (2) Greater than inspiratory reserve volume (3) Greater than inspiratory capacity (4) Greater than tidal volume KTN24-B4051 3  ELP-04 1. The de-oxygenated blood from heart comes to the lungs by (1) Pulmonary artery (2) Pulmonary vein (3) Bronchial artery (4) Renal artery 2. Oxygen containing blood is transported from lungs to heart by (1) Pulmonary artery (2) Pulmonary vein (3) Branchial artery (4) Renal vein 3. Partial pressure of carbon dioxide in Alveoli, atmospheric air and tissues will be :- (1) (0.3, 40, 45) mmHg (2) (40, 0.3, 45) mmHg (3) (0.3, 104, 28) mmHg (4) (104, 159, 40) mmHg 4. At the respiratory organs, exchange of gases take place by- (1) Active transport (2) Simple diffusion (3) Facilitated transport (4) Osmosis 5. Partial pressure of oxygen in Alveoli, atmospheric air and tissues will be :- (1) (0.3, 40, 45) mmHg (2) (104, 159, 40) mmHg (3) (0.3, 104, 28) mmHg (4) (159, 104, 40) mmHg 6. Respiratory membrane at our lungs is composed of ___A___ major layers and has average thickness of ___B___ mm. Select the option, which correctly fills A and B- (1) A- 3, B- more than one (2) A- 1, B- more than one (3) A- 3, B- less than one (4) A- 5, B- less than one 7. Upon increasing which of the following factor, rate of gaseous exchange at lungs will be decreased? (1) Partial pressure gradient (2) Solubility of gases (3) Thickness of respiratory membrane (4) Area of respiratory membrane 8. One haemoglobin can carry how many molecules of O2? (1) 4 (2) 2 (3) 6 (4) 8 9. Identify A, B and C in the diagram of a section of respiratory membrane: Options A B C (1) One-celled thick Basement substance Endothelium of squamous alveolar capillary epithelium (2) Thin alveolar wall Endothelium of Basement alveolar capillary substance (3) Basement Thin alveolar wall Endothelium of substance alveolar capillary (4) Endothelium of One-celled thick Basement alveolar capillary alveolar wall substance KTN24-B4051 4 10. Choose the incorrect statement: (1) The pO2 in the atmospheric air is higher than in the alveolar air (2) The pCO2 in the atmosphere air is lower than in the alveolar air (3) O2 that diffuses from atmospheric air into alveoli has a partial pressure of 104 mm Hg (4) The wall of alveoli is very thin and has rich network of blood capillaries 11. Identify A, B, C and D w.r.t. partial pressure of oxygen and carbon dioxide. Respiratory Atmospheric Alveoli Blood Blood Tissues gas air (Deoxygenated) (Oxygenated) O2 159 mm Hg A 40 mm Hg B 40 mm Hg CO2 C 40 mm Hg 45 mm Hg 40 mm Hg D (1) A = 104 mm Hg, B = 95 mm Hg, C = 0.3 mm Hg, D = 45 mm Hg (2) A = 180 mm Hg, B = 95 mm Hg, C = 3 mm Hg, D = 45 mm Hg (3) A = 104 mm Hg, B = 95 mm Hg, C = 30 mm Hg, D = 15 mm Hg (4) A = 159 mm Hg, B = 40 mm Hg, C = 45 mm Hg, D = 30 mm Hg ELP-05 1. H2CO3 is converted into CO2 and H2O with the help of an enzyme known as (1) Carboxylase (2) Carbonic dehydrogenase (3) Carbonium anhydrase (4) Carbonic anhydrase 2. How much percentage of CO2 is transport in the form of carbamino compounds ? (1) 70% (2) 90% (3) 5% (4) 23% 3. The largest amount of CO2 is transport in blood as (1) Carbamino compounds (2) Bicarbonates (3) Carbonic acid (4) Carbonate ions 4. CO2 reacts with water to form (1) Haemoglobinic acid (2) Carbonic acid (3) Bicarbonate ions (4) Carbon mono oxide 5. How much fraction of oxygen is transported to tissue through RBCs? (1) 100% (2) 56% (3) 45% (4) 97% 6. The metal ion present in haemoglobin is (1) Iron (2) Magnesium (3) Copper (4) Zinc 7. Maximum amount of O2 is transported in humans by (1) RBC (2) WBC (3) Blood platelets (4) Blood plasma 8. At higher CO2 concentration, oxygen dissociation curve of haemoglobin will (1) Move to left (2) Move to right (3) Become straight (4) Move upwardly 9. Oxygen haemoglobin dissociation curve will shift to right on decrease of (1) Acidity (2) Carbon dioxide concentration (3) Temperature (4) pH 10. Two statements are given here, read them and answer accordingly A- Carbonic anhydrase is present in the erythrocytes. B- In erythrocytes the carbon dioxide combines with water to form carbonic acid. (1) Statement A is correct and is responsible for statement B (2) Statement A is not correct but Statement B is correct (3) Both Statement A and B are wrong (4) Statement A is correct and statement B is wrong KTN24-B4051 5  ELP-06 1. Respiratory centre of brain is stimulated by (1) Carbon dioxide content in venous blood (2) Carbon dioxide content in arterial blood (3) Oxygen content in venous blood (4) Oxygen content in arterial blood 2. Respiratory rhythm centre is present in :- (1) cerebellum (2) Cerebrum (3) Medulla oblongata (4) Pons 3. Pneumotaxic centre is present on (1) Pons (2) Medulla (3) Cerebrum (4) Cerebellum 4. Asthma is a respiratory disease caused due to (1) Infection of trachea (2) Infection of lungs (3) Bleeding into pleural cavity (4) Allergy of lungs 5. When CO2 concentration in blood increases, breathing becomes – (1) There is no effect on breathing (2) Slow and deep (3) Faster (4) Shallower and slow 6. Haemoglobin shows maximum affinity with:- (1) Carbon monoxide (2) Carbon dioxide (3) Oxygen (4) Ammonia 7. The centre which excites both the activities during rapid breathing is (1) Ventral respiratory center (2) Lateral respiratory center (3) Pneumotaxic center (4) Dorsal respiratory center 8. The function of pneumotaxic center is to (1) Regulate inhalation (2) Maintain rhythmicity of respiration (3) Increases rate of inhalation (4) Does not play significant role 9. During normal breathing the ventral respiratory center (1) Maintain rhythmicity of respiration (2) Does not play significant role (3) Excites both inhalation and exhalation (4) Regulate breathing 10. Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively? (1) Inflammation of bronchioles; Decreased respiratory surface (2) Increased number of bronchioles; Increased respiratory surface (3) Increased respiratory surface; Inflammation of bronchioles (4) Decreased respiratory surface; Inflammation of bronchioles KTN24-B4051 6  Answer Key ELP-01 1. (1) 2. (4) 3. (2) 4. (4) 5. (1) 6. (4) 7. (4) 8. (2) 9. (1) 10. (2) ELP-02 1. (1) 2. (3) 3. (2) 4. (3) 5. (1) 6. (3) 7. (2) 8. (4) 9. (4) 10. (1) 11. (1) 12. (3) 13. (2) 14. (1) 15. (1) ELP-03 1. (2) 2. (3) 3. (1) 4. (2) 5. (1) 6. (2) 7. (3) 8. (1) 9. (3) 10. (4) ELP-04 1. (1) 2. (2) 3. (2) 4. (2) 5. (2) 6. (3) 7. (3) 8. (1) 9. (1) 10. (3) 11. (1) ELP-05 1. (4) 2. (4) 3. (2) 4. (2) 5. (4) 6. (1) 7. (1) 8. (2) 9. (4) 10. (1) ELP-06 1. (2) 2. (3) 3. (1) 4. (4) 5. (3) 6. (1) 7. (1) 8. (3) 9. (2) 10. (1) KTN24-B4051 7