This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Respiration In Organisms > Class 7 Science Chapter 6 Respiration In Organisms – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 6 Respiration In Organisms Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How does a human body get energy? A) Sunlight on the skin produces energy. B) Water provides the majority of energy. C) Food and oxygen combine to deliver energy. D) Sleep provides energy stored at night for the next day. Show Answer Correct Answer: C) Food and oxygen combine to deliver energy. 2. Yeasts are used in beer industries because it respires ..... A) Aerobically producing alcohol. B) Aerobically producing oxygen. C) Anaerobically producing oxygen. D) Anaerobically producing alcohol. Show Answer Correct Answer: D) Anaerobically producing alcohol. 3. What gas is produced by cellular respiration? A) Water. B) Carbon dioxide. C) Carbon monoxide. D) Oxygen. Show Answer Correct Answer: B) Carbon dioxide. 4. What is the basic function of alveoli? A) Increasing area of the lungs. B) Turning oxygen into carbon diaoxide. C) Gaseous exchange. D) No specific function. Show Answer Correct Answer: C) Gaseous exchange. 5. The waste gas given off by cellular respiration is? A) Methane. B) Oxygen. C) Nitrogen. D) Carbon dioxide. Show Answer Correct Answer: D) Carbon dioxide. 6. Which of the following gas turns lime water milky? A) Oxygen gas. B) Sulphur dioxide gas. C) Hydrogen gas. D) Carbon dioxide gas. Show Answer Correct Answer: D) Carbon dioxide gas. 7. All living things do which of the following? A) Chemoosenhesis. B) Respiration. C) Photosynthesis. D) All of the answers. Show Answer Correct Answer: B) Respiration. 8. As byproduct of photosynthesis, ..... is pumped into the air. A) Carbon dioxide. B) Oxygen. C) All the above. D) None of the above. Show Answer Correct Answer: B) Oxygen. 9. What is the dome shaped muscle called in respiratory system? A) Lungs. B) Diaphragm. C) Trachea. D) Bronchi. Show Answer Correct Answer: B) Diaphragm. 10. The taking in of air rich in oxygen into the body is called inhalation and giving out of air rich in carbon dioxide is called exhalation. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 11. Humans normally breath how many times per minute A) 14to20times. B) 20 Taa 0 Timis. C) Hatse. D) Upto80times. Show Answer Correct Answer: A) 14to20times. 12. Other Names for Wind Pipe A) Esophagus. B) Trachea. C) Food Pipe. D) None of these. Show Answer Correct Answer: B) Trachea. 13. What is the structure in the leaves of the plants which are responsible for exchange of oxygen and carbon dioxide? A) Guard Cells. B) Chlorophyll. C) Chloroplast. D) Stomata. Show Answer Correct Answer: D) Stomata. 14. Yeast is used in wine and beer industries because it respires? A) Aerobically producing oxygen. B) Aerobically producing alcohol. C) Anaerobically producing alcohol. D) Anaerobically producing $CO_2$. Show Answer Correct Answer: C) Anaerobically producing alcohol. 15. Which of the following is not a type of bacteria? A) Spirilla. B) Vibrio. C) Rhizopus. D) Cocci. Show Answer Correct Answer: C) Rhizopus. 16. Autotrophs that convert light energy into chemical energy are called ..... A) Heterotrophs. B) Photoautotrophs. C) Chemoautotrophs. D) Omnivores. Show Answer Correct Answer: B) Photoautotrophs. 17. A new born baby breathes ..... times a minute. A) 80 times. B) 20 times. C) 14 times. D) 40 times. Show Answer Correct Answer: D) 40 times. 18. During inhalation, the diaphragm moves: A) . Moves towards right. B) . Moves upwards. C) . Moves downwards. D) . Moves towards left. Show Answer Correct Answer: C) . Moves downwards. 19. Where in the body does respiration take place? Select the best answer. A) The lungs. B) The muscles. C) All cells. D) The blood. Show Answer Correct Answer: C) All cells. 20. In our lungs, ..... is removed and ..... is absorbed. A) Oxygen carbon dioxide. B) Oxygen nitrogen. C) Carbon dioxide oxygen. D) Carbon dioxide nitrogen. Show Answer Correct Answer: C) Carbon dioxide oxygen. 21. During inhalation, our lungs ..... A) EXPAND. B) CONTRACT. C) All the above. D) None of the above. Show Answer Correct Answer: A) EXPAND. 22. Fishes have special organs for respiration called gills. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 23. Glucose/sugar and oxygen are ..... A) Products of cell respiration. B) Reactants of cell respiration. C) All the above. D) None of the above. Show Answer Correct Answer: B) Reactants of cell respiration. 24. Why is oxygen important in the process of respiration? A) Oxygen is needed for the final step of cellular respiration, where it acts as the final electron acceptor in the electron transport chain. B) Oxygen is not important in the process of respiration. C) Oxygen is only important for plants, not for animals. D) Oxygen is used to produce carbon dioxide during respiration. Show Answer Correct Answer: A) Oxygen is needed for the final step of cellular respiration, where it acts as the final electron acceptor in the electron transport chain. 25. After heavy exercise, due to the accumulation of ..... substance, we get muscle cramps A) Lipoic acid. B) Lactic acid. C) Malaic acid. D) Fumaric acid. Show Answer Correct Answer: B) Lactic acid. 26. An adult human being at rest breathes in and out ..... times in a minute A) 16-18. B) 12-15. C) 15-18. D) 14-18. Show Answer Correct Answer: C) 15-18. 27. To get the most ATP molecules for energy in cellular respiration, you have to have lots of? A) Carbon dioxide. B) Hydrogen. C) Water. D) Oxygen. Show Answer Correct Answer: D) Oxygen. 28. Which organisms can perform anaerobic respiration? A) Only plants. B) Only humans. C) Yeast and bacteria. D) All animals. Show Answer Correct Answer: C) Yeast and bacteria. 29. Nostril-trachea-X-bronchioles-alveolus.So X is, A) Bronchus. B) Lung. C) Larynx. D) Blood capillary. Show Answer Correct Answer: A) Bronchus. 30. What are the two main types of respiration? A) Aerobic respiration and anaerobic respiration. B) Oxidative phosphorylation and glycolysis. C) Photosynthesis and fermentation. D) Cellular respiration and combustion. Show Answer Correct Answer: A) Aerobic respiration and anaerobic respiration. 31. Some times when we do heavy exercise, anaerobic respiration takes place in our muscles. What is produced during this process? A) Alcohol and Carbon dioxide. B) Lactic acid and alcohol. C) Lactic acid and carbon dioxide. D) Lactic acid only. Show Answer Correct Answer: C) Lactic acid and carbon dioxide. 32. Carbon dioxide and water are A) Reactants of cell respiration. B) Products of cell respiration. C) All the above. D) None of the above. Show Answer Correct Answer: B) Products of cell respiration. 33. The Process that involves the breakdown of food which leads to the release of ..... in living organisms is called respiration. A) Mass. B) Energy. C) Work. D) None of the above. Show Answer Correct Answer: B) Energy. 34. Plant can die if overwater? A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 35. Which of these best explains why predators need plants, such as grass, in their ecosystem? A) Plants break down the organisms that the predators eat. B) Plants are a large part of their diets. C) Plants provide food for their animals that the predators eat. D) Plants provide safety for predators. Show Answer Correct Answer: C) Plants provide food for their animals that the predators eat. 36. The dome shaped structure called ..... forms the base of the chest cavity. A) Lungs. B) Diaphragm. C) Alveolus. D) Diaphramg. Show Answer Correct Answer: B) Diaphragm. 37. Plants respire through ..... A) Cell membrane. B) Cells. C) Stomata. D) Gills. Show Answer Correct Answer: C) Stomata. 38. The process of breakdown of food in the cell with the release of energy is called ..... respiration. A) Aerobic. B) Cellular. C) Anaerobic. D) None of the above. Show Answer Correct Answer: B) Cellular. 39. An example of aerobes is A) Cat. B) Dog. C) Humans. D) All of these. Show Answer Correct Answer: D) All of these. 40. Which gas is given out during exhalation? A) Oxygen. B) Nitrogen. C) Carbon dioxide. D) All of these. Show Answer Correct Answer: C) Carbon dioxide. 41. Choose which among the following can breathe through lungs as well as through skin? A) Earthworm. B) Dolphin. C) Frog. D) Fish. Show Answer Correct Answer: C) Frog. 42. Which best describes how organisms process materials to gain energy for life processes? A) Oxygen is broken down in a chemical reaction with sugars to release energy. B) Sugars are broken down in a chemical reaction with oxygen to release energy. C) Vitamins and minerals are used to build complex molecules that store energy. D) Vitamins and minerals are used to break down complex molecules that store energy. Show Answer Correct Answer: B) Sugars are broken down in a chemical reaction with oxygen to release energy. 43. What is the main goal of cell respiration? A) To break down glucose in the form of ATP. B) To create CO2 for plants. C) To make ATP that we use for energy. D) Respiration is a byproduct of photosynthesis. Show Answer Correct Answer: A) To break down glucose in the form of ATP. 44. Why do whales and dolphins often come up to the water surface? A) To breathe. B) To get food. C) To swim. D) To get more sunlight. Show Answer Correct Answer: A) To breathe. 45. The process that converts food (glucose) into energy is called A) Cellular Respiration. B) Photosynthesis. C) Carbon dioxide. D) Chloroplast. Show Answer Correct Answer: A) Cellular Respiration. 46. Aerobic respiration ..... A) Does not require oxygen. B) Requires CO2. C) Requires oxygen. D) Does not require CO2. Show Answer Correct Answer: C) Requires oxygen. 47. What is the cellular respiration chemical equation? A) C12HO6 + 6C2 5CO2+6H2O + energy. B) C6H12O6 + 6O2 6CO2+6H2O + energy. C) C612O6 + 6O2 12HO2 + energy. D) C6H12O6 + 6O2 energy. Show Answer Correct Answer: B) C6H12O6 + 6O2 6CO2+6H2O + energy. 48. Oxygen is released into the air by A) Plants. B) The sun. C) Animals. D) Volcanoes. Show Answer Correct Answer: A) Plants. 49. DURING HEAVY EXERCISE WE BREATHE SLOWLY A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 50. When we breath which things moves down A) Alveoli. B) Chest cavity. C) Lungs. D) Diaphragm. Show Answer Correct Answer: D) Diaphragm. 51. Fish breathe with the help of gills which are richly supplied with blood vessels. The gills help the fish to A) Take in oxygen from air. B) Absorb nutrients present in water. C) Release waste substances in water. D) Take in oxygen dissolved in water. Show Answer Correct Answer: D) Take in oxygen dissolved in water. 52. Which type of organism would MOST likely benefit directly from increased levels of CO2? A) Tree. B) Bird. C) Mushroom. D) Fish. Show Answer Correct Answer: A) Tree. 53. A large muscular sheet present on the floor of the chest cavity is called A) Diaphragm. B) Trachea. C) Alveoli. D) None of the above. Show Answer Correct Answer: A) Diaphragm. 54. What does metabolism mean? A) Converting energy into food. B) Making light reactions happen. C) Converting food into energy. D) None of the above. Show Answer Correct Answer: C) Converting food into energy. 55. ..... and respiration processes are complementary to each other. A) Photosynthesis. B) Aerobic respiration. C) Fermentation. D) None of the above. Show Answer Correct Answer: A) Photosynthesis. 56. Through which tubes does air enter the lungs from bronchi? A) Alveoli. B) Larynx. C) Trachea. D) Bronchioles. Show Answer Correct Answer: D) Bronchioles. 57. The process of keeping things inside your body constant A) Homeostasis. B) Hibernation. C) Migration. D) Organism. Show Answer Correct Answer: A) Homeostasis. 58. What is the name of the pigment molecule that absorbs light energy and makes plants green? A) Mitochondria. B) Glucose. C) ChlorophyllTags9B. D) Chloroplast. Show Answer Correct Answer: C) ChlorophyllTags9B. 59. All organisms are made of small microscopic units which cannot be seen with the naked eyes, called:(a) animals(b) cells(c) tissues(d) organs A) Tissues. B) Animals. C) Organs. D) Cells. Show Answer Correct Answer: D) Cells. 60. The specialized cells found in plants that collect light are ..... A) Chloroplasts. B) Chlorophyll. C) Leaves. D) None of the above. Show Answer Correct Answer: A) Chloroplasts. 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