This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Respiration In Organisms > Class 7 Science Chapter 6 Respiration In Organisms – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 6 Respiration In Organisms Quiz 15 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. For aerobic respiration, ..... is the gas present in air is essential. A) Oxygen. B) Carbon-dioxide. C) Both. D) None of the above. Show Answer Correct Answer: A) Oxygen. 2. ..... means without air A) Combustion. B) Respiration. C) Anaerobic respiration. D) None of these. Show Answer Correct Answer: C) Anaerobic respiration. 3. What is the primary pigment found in plants? A) Melanin. B) Hemoglobin. C) Carbon dioxide. D) Chlorophyll. Show Answer Correct Answer: D) Chlorophyll. 4. Which of the following organism depend on the process of cell respiration for survival? A) Animals, some algae, and phytoplankton but NOT plants. B) Only animals, since they go through process of cell respiration. C) Humans only. D) All organisms that break down glucose for food; including plants and animals. Show Answer Correct Answer: D) All organisms that break down glucose for food; including plants and animals. 5. The sugar organisms need to convert to energy is called A) Sucrose. B) Glucose. C) All the above. D) None of the above. Show Answer Correct Answer: B) Glucose. 6. The number of ATP molecules released in aerobic respiration is A) 39. B) 38. C) 41. D) 40. Show Answer Correct Answer: B) 38. 7. Muscle cramps occur due to accumulation of A) Glucose in the muscles. B) Carbon dioxide and water in the muscles. C) Lactic acid in the muscles. D) Oxygen in the muscles. Show Answer Correct Answer: C) Lactic acid in the muscles. 8. Explain the concept of cellular respiration. A) The process by which cells break down water to produce energy. B) The process by which cells break down oxygen to produce energy. C) The process by which cells break down carbon dioxide to produce energy. D) The process by which cells break down glucose to produce energy. Show Answer Correct Answer: D) The process by which cells break down glucose to produce energy. 9. The breathing rate for a normal human adult is- A) 25-30. B) 5-10. C) 15-18. D) 70-75. Show Answer Correct Answer: C) 15-18. 10. Frogs breath through ..... when they have tadpoles A) Leg. B) Muscles. C) Gills. D) None of the above. Show Answer Correct Answer: C) Gills. 11. Cellular respiration takes place in the cells of all organisms. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 12. Insect Breathe Through A) Spiracles. B) Trachea. C) Lungs. D) Gills. Show Answer Correct Answer: A) Spiracles. 13. Which of the following do we NOT use the energy gained through respiration for: A) Movement. B) Growth and Repair. C) Sleeping. D) Building new molecules. Show Answer Correct Answer: C) Sleeping. 14. Which is a product of photosynthesis? A) H$_{2}$O. B) O. C) C$_{6}$H$_{12}$O$_{6}$. D) CO$_{2}$. Show Answer Correct Answer: C) C$_{6}$H$_{12}$O$_{6}$. 15. The characteristic of Bryophta is: A) Have stem, leaves but no roots. B) Have stem, leaves and roots. C) Have stems, leaves, roots and flowers. D) Have no stems, roots or leaves. Show Answer Correct Answer: A) Have stem, leaves but no roots. 16. All living organisms must maintain homeostasis in order to survive. Which statement best describes one way humans maintain homeostasis? A) Temperature is regulated by sweating. B) Temperature is regulated by giving off carbon dioxide. C) Water content is regulated by giving off carbon dioxide. D) Water content is regulated by sweating. Show Answer Correct Answer: A) Temperature is regulated by sweating. 17. During heavy exercise when supply of oxygen to our muscles is insufficient food breakdown is by A) Anaerobic respiration. B) Aerobic respiration. C) Cellular respiration. D) None of the above. Show Answer Correct Answer: A) Anaerobic respiration. 18. The products of photosynthesis serve as the reactants in cellular respiration to provide chemical energy. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. Muscle cramps after heavy exercise are caused due to the accumulation of A) I. Alcohol. B) Ii. Uric acid. C) Iv. Acetic acid. D) Iii. Lactic acid. Show Answer Correct Answer: D) Iii. Lactic acid. 20. Which gas is primarily inhaled during respiration? A) Oxygen. B) Carbon dioxide. C) Hydrogen. D) Nitrogen. Show Answer Correct Answer: A) Oxygen. 21. A group of organs in the shape of long pipe with length of 9-10 meters. A) Digestive system. B) Respiratory system. C) Small intestine. D) Large intestine. Show Answer Correct Answer: A) Digestive system. 22. Lactic-acid fermentation converts ..... into ATP and a waste product called lactic acid. A) Yeast. B) Energy. C) Bacteria. D) Glucose. Show Answer Correct Answer: D) Glucose. 23. Terrestrial arthropods, like insects, have ..... which are openings to the external environment that allow air into the body. A) Spiracles. B) Tracheoles. C) Trachea. D) Bronchioles. Show Answer Correct Answer: A) Spiracles. 24. The system that carries out the respiration process is ..... A) Respiratory system. B) Digestive system. C) Nervous system. D) Urinary system. Show Answer Correct Answer: A) Respiratory system. 25. The openings through which we inhale are known as A) Nostrils. B) Lungs. C) Whole Nasal Cavity. D) None of these. Show Answer Correct Answer: A) Nostrils. 26. ..... damages lungs. Smoking is also linked to cancer. A) ALCOHOL. B) SMOKING. C) All the above. D) None of the above. Show Answer Correct Answer: B) SMOKING. 27. ..... is also known as windpipe A) Larynx. B) Diaphragm. C) Trachea. D) Lungs. Show Answer Correct Answer: C) Trachea. 28. During inhalation A) Ribs moves outward and diaphragm moves downwards. B) Ribs moves in and diaphragm moves down. C) Ribs moves in and diaphragm moves up. D) Ribs moves out and diaphragm moves in. Show Answer Correct Answer: A) Ribs moves outward and diaphragm moves downwards. 29. Which molecule is a product of respiration? A) Oxygen. B) Protein. C) Carbon dioxide. D) Glucose. Show Answer Correct Answer: C) Carbon dioxide. 30. Where does photosynthesis occur in plants? A) Chloroplasts. B) Mitochondria. C) Nucleus. D) Vacuole. Show Answer Correct Answer: A) Chloroplasts. 31. What is the percentage of oxygen inhaled and exhaled air respectively? A) 23% and 2%. B) 34% and 10%. C) 21% and 16.4 %. D) 17.2% and 3.6 %. Show Answer Correct Answer: C) 21% and 16.4 %. 32. Vacuoles are present in animal cell. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 33. Explain the role of diaphragm in the mechanism of breathing. A) The diaphragm helps in digestion by secreting digestive enzymes. B) The diaphragm has no role in the mechanism of breathing. C) The diaphragm helps in the process of inhalation and exhalation by changing the volume of the chest cavity. D) The diaphragm only helps in exhalation and not in inhalation. Show Answer Correct Answer: C) The diaphragm helps in the process of inhalation and exhalation by changing the volume of the chest cavity. 34. Frog breath through? A) Lungs. B) Skin. C) Both a and b. D) None of these. Show Answer Correct Answer: C) Both a and b. 35. The major source of oxygen for aquatic animals is A) Atmosphere. B) Soil. C) Water. D) Carbon dioxide. Show Answer Correct Answer: C) Water. 36. Tobacco chewing can result in A) Leukemia. B) Bone Cancer. C) Mouth Cancer. D) Lung Cancer. Show Answer Correct Answer: C) Mouth Cancer. 37. What is living as well as non-living? A) Bacteria. B) Virus. C) Humans. D) Amoeba. Show Answer Correct Answer: B) Virus. 38. The process by which organisms maintain homeostasis is known as A) Regulation. B) Synthesis. C) Respiration. D) Digestion. Show Answer Correct Answer: A) Regulation. 39. What main food group do we get most of our energy from? A) Proteins. B) Carbs. C) Meats. D) None of the above. Show Answer Correct Answer: B) Carbs. 40. Breathing is a ..... process while respiration is a ..... process. A) Physical, chemical. B) Chemical, chemical. C) Chemical, physical. D) Physical, physical. Show Answer Correct Answer: A) Physical, chemical. 41. Which of the following features of the respiratory tract helps to warm the inhaled air? A) The nasal cavity has a lot of hair. B) The lining of the trachea is covered with cilia. C) The lining of the respiratory tract is coated with mucus. D) The wall of the nasal cavity is richly supplied with capillaries. Show Answer Correct Answer: D) The wall of the nasal cavity is richly supplied with capillaries. 42. True of False?The gill cover is called the Operculum. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 43. What chemical bond in ATP releases energy when broken? A) Sulfur. B) Potassium. C) Phosphate. D) Oxygen. Show Answer Correct Answer: C) Phosphate. 44. Human breathe through their ..... A) Trachea. B) Nose. C) Stomata. D) Gills. Show Answer Correct Answer: B) Nose. 45. Fishes take in water through the ..... a ..... and force it past the ..... b ..... where the dissolved oxygen is taken up by the blood. A) A-gills, b-mouth. B) A-mouth, b-gills. C) A-gills, b-gills. D) None of the above. Show Answer Correct Answer: B) A-mouth, b-gills. 46. The system that helps the body getting rid of harmful substances is ..... A) Urinary system. B) Reproductive system. C) Nervous system. D) Digestive system. Show Answer Correct Answer: A) Urinary system. 47. Which term describes the relatively constant internal physical conditions of an organism? A) Permeability. B) Homeostasis. C) Specialization. D) Unicellularity. Show Answer Correct Answer: B) Homeostasis. 48. Which among the given animals breathe through their lungs as well as skin? A) Fish. B) Frog. C) Crocodile. D) Earthworm. Show Answer Correct Answer: B) Frog. 49. Both autotrophs & heterotrophs break down glucose to release ..... energy. A) CSI. B) HCl. C) H2O. D) ATP. Show Answer Correct Answer: D) ATP. 50. Which of the following is not a bacterial disease? A) Covid. B) Botulism. C) Tetanus. D) Cholera. Show Answer Correct Answer: A) Covid. 51. Cellular respiration is similar in both plants and animals in what way? A) Energy is required and oxygen is released. B) Nitrogen is required and energy is released. C) Oxygen is required and energy is released. D) Oxygen is required and carbon is released. Show Answer Correct Answer: C) Oxygen is required and energy is released. 52. The special features which enable living organisms to survive in their surrounding is known as ..... A) Environment. B) Adaptation. C) Abiotic. D) Habitat. Show Answer Correct Answer: B) Adaptation. 53. The movement of plant under the influence of light is called ..... A) Phototrophism. B) Geotropism. C) All the above. D) None of the above. Show Answer Correct Answer: A) Phototrophism. 54. During inspiration or inhalation, in lungs: A) Volume increases, pressure decreases. B) Volume increases, pressure increases. C) Volume decreases, pressure increases. D) Volume decreases, pressure decreases. Show Answer Correct Answer: A) Volume increases, pressure decreases. 55. At which trophic level is the MOST amount of energy available? A) Primary consumers. B) Primary producers. C) Secondary consumers. D) Tertiary consumers. Show Answer Correct Answer: B) Primary producers. 56. In unicellular animals such as A) Amoeba. B) Paramoecium. C) Both a) and b). D) Animals. Show Answer Correct Answer: C) Both a) and b). 57. Cockroaches breathe by using called A) Nose. B) Tracheae. C) Both (a) and (b). D) None of these. Show Answer Correct Answer: B) Tracheae. 58. While running which type of respiration is used? A) Aerobic. B) Anarobic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Anarobic. 59. 1Which organism is decribed in the information given below?i) Respire anerobically.ii) Used for bread makingiii) Reproduce by budding A) 2.Yeast. B) 1.Rhizopus. C) 4.Potato. D) 3.Bread mould. Show Answer Correct Answer: A) 2.Yeast. 60. The leaves of the plants have tiny pores called A) None of these. B) Stomata. C) Chllorophyll. D) Photosynthesis. Show Answer Correct Answer: B) Stomata. ← PreviousNext →Related 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