This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Respiration In Organisms > Class 7 Science Chapter 6 Respiration In Organisms – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 6 Respiration In Organisms Quiz 18 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. On inhaling the diaphragm moves A) Right. B) Down. C) Left. D) Up. Show Answer Correct Answer: B) Down. 2. Roots take up air from the air spaces present between the soil particles. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 3. Inhalation occurs when diaphragm moves ..... and ribs move upward and ..... A) Upward, outward. B) Downward, inward. C) Upward, inward. D) Downward, outward. Show Answer Correct Answer: D) Downward, outward. 4. Aquatic plants respire by absorbing A) Oxygen from air. B) Carbon dioxide. C) Dissolved oxygen in water. D) Sunlight. Show Answer Correct Answer: C) Dissolved oxygen in water. 5. What is the difference between external and internal respiration? A) External respiration is the process of digestion; internal respiration is the exchange of nutrients. B) External respiration happens during exercise; internal respiration occurs at rest. C) External respiration occurs in the heart; internal respiration occurs in the lungs. D) External respiration occurs in the lungs; internal respiration occurs in body tissues. Show Answer Correct Answer: D) External respiration occurs in the lungs; internal respiration occurs in body tissues. 6. The organ of locomotion in Euglena is ..... A) Pseudopodia. B) Cilia. C) Predictment. D) Flagella. Show Answer Correct Answer: D) Flagella. 7. Food can also be broken down without using oxygen. This is called A) Anaerobic Respiration. B) Cellular Respiration. C) Aerobic Respiration. D) None of These. Show Answer Correct Answer: A) Anaerobic Respiration. 8. Earthworm breath through? A) Lungs. B) Spiracles. C) Gills. D) Skin. Show Answer Correct Answer: D) Skin. 9. Along with energy, the product(s) of anaerobic respiration in yeast is/are A) I. Carbon dioxide. B) Ii. Alcohol. C) Iii. Water. D) Iv. Both (i) and (ii). Show Answer Correct Answer: D) Iv. Both (i) and (ii). 10. Neither photosynthesis & respiration require water as a reactant. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 11. Simon breathes in and out of a paper bag three times. How has the oxygen and carbon dioxide in the bag changed after three breathes? A) Oxygen:increase, Carbon dioxide:Increase. B) Oxygen:increase, Carbon dioxide:decrease. C) Oxygen:decrease, Carbon dioxide:decrease. D) Oxygen:decrease, Carbon dioxide:Increase. Show Answer Correct Answer: D) Oxygen:decrease, Carbon dioxide:Increase. 12. Autotrophs are organisms that produce their own food. Which do scientist classify as autotrophs? A) Chordates. B) Molds. C) Fungi. D) Plants. Show Answer Correct Answer: D) Plants. 13. Which of the following prevent the entry of food into the trachea? A) Epiglottis. B) Trachea. C) Salivary gland. D) Oesophagus. Show Answer Correct Answer: A) Epiglottis. 14. The removal of waste in living beings is known as ..... A) Excretion. B) Respiration. C) Response to stimulus. D) Growth. Show Answer Correct Answer: A) Excretion. 15. Define aerobic respiration. A) Anaerobic respiration occurs without oxygen. B) Aerobic respiration is the breakdown of glucose in the absence of oxygen. C) Aerobic respiration is a process that only occurs in plants. D) Aerobic respiration is the process of producing cellular energy in the presence of oxygen. Show Answer Correct Answer: D) Aerobic respiration is the process of producing cellular energy in the presence of oxygen. 16. Respiration is a process opposite to? A) Blood circulation. B) Digestion. C) Photosynthesis. D) None of these. Show Answer Correct Answer: C) Photosynthesis. 17. Given the following structures:1. larynx2. nasal cavity3. pharynx4. tracheaWhich of the following is the correct order that air would flow during inhalation. A) 1, 2, 3, 4. B) 4, 2, 3, 1. C) 2, 1, 3, 4. D) 2, 3, 1, 4. Show Answer Correct Answer: D) 2, 3, 1, 4. 18. What is main organ of respiration A) Nose. B) Wind pipe. C) Trachea. D) Lung. Show Answer Correct Answer: D) Lung. 19. When you step out into the cold, your body shivers in order to keep its temperature at 98.6F. A) All living things use energy. B) All living things contain cells. C) All living things maintain homeostasis. D) All living things grow. Show Answer Correct Answer: C) All living things maintain homeostasis. 20. Which of the following option presents the passage of air from outside to lungs? A) Pharynx, trachea, larynx, bronchial tubes. B) Larynx, trachea, pharynx, bronchial tubes. C) Pharynx, larynx, trachea, bronchial tubes. D) Bronchial tubes, trachea, pharynx, larynx. Show Answer Correct Answer: C) Pharynx, larynx, trachea, bronchial tubes. 21. Pick a example of anaerobic respiration? A) Water. B) Yeast. C) Humans. D) Lactic acid. Show Answer Correct Answer: B) Yeast. 22. Which terms best describe heterotrophs? A) Plants; consumers. B) Animals; consumers. C) Plants; producers. D) Animals; producers. Show Answer Correct Answer: B) Animals; consumers. 23. Anaerobic organisms undergo the process of: A) Fermentation. B) Photosynthesis. C) Curing. D) Transpiration. Show Answer Correct Answer: A) Fermentation. 24. Is yeast a Anarobic or aerobic excreting organisms? A) Anarobic. B) Aerobic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Anarobic. 25. Every system in the body is consisted of some ..... A) Organs. B) Tissues. C) Nerves. D) Glands. Show Answer Correct Answer: A) Organs. 26. ..... is the energy-requiring process which joins smaller molecules together to form larger molecules. A) Metabolism. B) Anabolism. C) Catabolism. D) Heat Transfer. Show Answer Correct Answer: B) Anabolism. 27. Dolphins breathe through their ..... A) Skin. B) Spiracles. C) Blowholes. D) Gills. Show Answer Correct Answer: C) Blowholes. 28. Reserve food material in fungi is called ..... A) Hyphae. B) Mycellium. C) Glycogen. D) Chitin. Show Answer Correct Answer: C) Glycogen. 29. Which is a form of energy? A) Cellular Respiration. B) Heat. C) Photosynthesis. D) Fermentation. Show Answer Correct Answer: B) Heat. 30. Explain the role of mitochondria in cellular respiration. A) Mitochondria produce glucose through the process of cellular respiration. B) Mitochondria store water through the process of cellular respiration. C) Mitochondria release oxygen through the process of cellular respiration. D) Mitochondria produce ATP through the process of cellular respiration. Show Answer Correct Answer: D) Mitochondria produce ATP through the process of cellular respiration. 31. Which of the following processes will most likely contribute to the development of soil? A) Volcanic eruptions that make new land. B) Building up of snow in very cold areas. C) Migration of animals to warmer climates. D) Breaking down of rock by wind, water, and ice. Show Answer Correct Answer: D) Breaking down of rock by wind, water, and ice. 32. ..... is the common part between our digestive and respiratory system. A) Pharynx. B) Wind pipe. C) Larynx. D) Food pipe. Show Answer Correct Answer: A) Pharynx. 33. Through which tubes does air enters the lungs from the windpipe? A) Bronchi. B) Trachea. C) Alveoli. D) None of the above. Show Answer Correct Answer: A) Bronchi. 34. What is the average breathing rate of a human at rest? A) 10-15 breaths per minute. B) 20-25 breaths per minute. C) 25-30 breaths per minute. D) 15-20 breaths per minute. Show Answer Correct Answer: D) 15-20 breaths per minute. 35. During inhalation, the diaphragm A) Moves downward. B) Moves upward. C) Moves towards left. D) Moves towards right. Show Answer Correct Answer: A) Moves downward. 36. The exchange of gases takes place in trachea. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 37. Is respiration the same as breathing? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 38. What do the plants release during the respiration? A) O2. B) CO2. C) Carbon Dioxide. D) Oxygen. Show Answer Correct Answer: C) Carbon Dioxide. 39. The two main factors that determine the rate of weathering are the TYPE of rock and ..... A) Size of rock. B) Music. C) Weight of rock. D) Climate. Show Answer Correct Answer: D) Climate. 40. If the food is broken down with the use of oxygen, it is called ..... respiration A) AEROBIC. B) ANEROBIC. C) All the above. D) None of the above. Show Answer Correct Answer: A) AEROBIC. 41. Which of the following is not a characteristic of Euglena? A) It has chloroplasts. B) It has a cellulosic cell wall. C) It can take in food like animals in the absence of light. D) It can prepare its own food. Show Answer Correct Answer: B) It has a cellulosic cell wall. 42. Plants do respiration ..... A) When they cannot photosynthesise. B) 24 hours a day. C) During the day time. D) Never. Show Answer Correct Answer: B) 24 hours a day. 43. The first step in the process of respiration is the breakdown of glucose into a three carbon molecule called ..... A) Lipids. B) Starch. C) Pyruvate. D) None of the above. Show Answer Correct Answer: C) Pyruvate. 44. We take in air with the help of A) Oxygen. B) Nose. C) Nostrils. D) Nasal cavity. Show Answer Correct Answer: C) Nostrils. 45. In insects, exchange of gases take place through A) Spiracles. B) Gills. C) Lungs. D) None of the above. Show Answer Correct Answer: A) Spiracles. 46. In daylight, Plants A) I) Take in Oxygen and Breathe out Carbon dioxide for respiration. B) Iii) Take in Carbon dioxide and release Oxygen for photosynthesis. C) Iii) Take in Oxygen and release Carbon dioxide for photosynthesis. D) Iv) Both (i) and (ii). Show Answer Correct Answer: D) Iv) Both (i) and (ii). 47. Cellular respiration and photosynthesis are considered to be ..... A) The same equation. B) Opposites of one another. C) Unique in every way. D) Not important at all!. Show Answer Correct Answer: B) Opposites of one another. 48. What is the respiratory organ in leech? A) Skin. B) Lungs. C) Gills. D) None of the above. Show Answer Correct Answer: A) Skin. 49. A cell is the smallest ..... of an organism. A) Structural and functional unit. B) Structural unit. C) Functional unit. D) None of the above. Show Answer Correct Answer: A) Structural and functional unit. 50. Does Oxygen diffuse ..... A) Into the lungs. B) Into the blood stream. C) All the above. D) None of the above. Show Answer Correct Answer: B) Into the blood stream. 51. Identify the main energy source that is a reactant in photosynthesis A) Carbon Dioxide. B) Sunlight. C) Water. D) Glucose. Show Answer Correct Answer: B) Sunlight. 52. Which of the following means "making more of the same kind of organism" ? A) Move. B) Develop. C) Reproduce. D) Grow. Show Answer Correct Answer: C) Reproduce. 53. YEAST is used in bakery, wine and Beer industry, it respires A) Anaerobically. B) Aerobically. C) Both anaerobic and aerobic. D) None of the above. Show Answer Correct Answer: A) Anaerobically. 54. Photosynthesis, the process that plants undergo to make glucose, takes place in the ..... A) Mitochondria. B) Cell wall. C) Chloroplast. D) Stomata. Show Answer Correct Answer: C) Chloroplast. 55. Which among the given statements is true regarding aerobic and anaerobic respiration? A) Aerobic respiration produces more energy. B) Anaerobic respiration produces more energy. C) Anaerobic respiration does not release Carbondioxide. D) All are true. Show Answer Correct Answer: A) Aerobic respiration produces more energy. 56. The process of producing energy by breakdown of food is called ..... A) Nutrition. B) Transpiration. C) Photosynthesis. D) Respiration. Show Answer Correct Answer: D) Respiration. 57. Breathing is a part of the process of respiration during which an organism takes in the oxygen-rich air and gives out air rich in ..... A) OXYGEN. B) CARBON DIOXIDE. C) All the above. D) None of the above. Show Answer Correct Answer: B) CARBON DIOXIDE. 58. Respiration is not seen in A) Sprouted seeds. B) Flowers and buds. C) Fruits. D) Dry leaves. Show Answer Correct Answer: D) Dry leaves. 59. When we breathe in, the air from our nostrils pass into the- A) Chest cavity. B) Lungs. C) Nasal cavity. D) Trachea. Show Answer Correct Answer: C) Nasal cavity. 60. How does matter move through cell respiration? A) Matter is destroyed. B) Matter is moved as water. C) Matter is moved as ATP. D) Matter is moved as sunlight. Show Answer Correct Answer: C) Matter is moved as ATP. ← PreviousRelated QuizzesScience QuizzesClass 7 QuizzesClass 7 Science Chapter 6 Respiration In Organisms Quiz 1Class 7 Science Chapter 6 Respiration In Organisms Quiz 2Class 7 Science Chapter 6 Respiration In Organisms Quiz 3Class 7 Science Chapter 6 Respiration In Organisms Quiz 4Class 7 Science Chapter 6 Respiration In Organisms Quiz 5Class 7 Science Chapter 6 Respiration In Organisms Quiz 6Class 7 Science Chapter 6 Respiration In Organisms Quiz 7Class 7 Science Chapter 6 Respiration In Organisms Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books