This quiz works best with JavaScript enabled. Home > Class 7 > 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 (25 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) Carbon dioxide. B) Oxygen. C) Water. D) Carbon monoxide. Show Answer Correct Answer: A) Carbon dioxide. 4. What is the basic function of alveoli? A) Increasing area of the lungs. B) Gaseous exchange. C) Turning oxygen into carbon diaoxide. D) No specific function. Show Answer Correct Answer: B) Gaseous exchange. 5. The waste gas given off by cellular respiration is? A) Oxygen. B) Carbon dioxide. C) Nitrogen. D) Methane. Show Answer Correct Answer: B) Carbon dioxide. 6. Which of the following gas turns lime water milky? A) Hydrogen gas. B) Carbon dioxide gas. C) Oxygen gas. D) Sulphur dioxide gas. Show Answer Correct Answer: B) Carbon dioxide gas. 7. When we inhale air, it passes through our nostrils into the A) Ribs. B) Nasal cavity. C) Chest cavity. D) None of the above. Show Answer Correct Answer: B) Nasal cavity. 8. 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. 9. 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. 10. What is the dome shaped muscle called in respiratory system? A) Diaphragm. B) Bronchi. C) Trachea. D) Lungs. Show Answer Correct Answer: A) Diaphragm. 11. 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. 12. 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. 13. Other Names for Wind Pipe A) Esophagus. B) Trachea. C) Food Pipe. D) None of these. Show Answer Correct Answer: B) Trachea. 14. What is the structure in the leaves of the plants which are responsible for exchange of oxygen and carbon dioxide? A) Stomata. B) Guard Cells. C) Chloroplast. D) Chlorophyll. Show Answer Correct Answer: A) Stomata. 15. 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. 16. Which of the following is not a type of bacteria? A) Rhizopus. B) Vibrio. C) Spirilla. D) Cocci. Show Answer Correct Answer: A) Rhizopus. 17. Autotrophs that convert light energy into chemical energy are called ..... A) Photoautotrophs. B) Heterotrophs. C) Chemoautotrophs. D) Omnivores. Show Answer Correct Answer: A) Photoautotrophs. 18. A new born baby breathes ..... times a minute. A) 40 times. B) 80 times. C) 14 times. D) 20 times. Show Answer Correct Answer: A) 40 times. 19. During inhalation, the diaphragm moves: A) . Moves downwards. B) . Moves upwards. C) . Moves towards left. D) . Moves towards right. Show Answer Correct Answer: A) . Moves downwards. 20. 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. 21. In our lungs, ..... is removed and ..... is absorbed. A) Oxygen carbon dioxide. B) Carbon dioxide oxygen. C) Oxygen nitrogen. D) Carbon dioxide nitrogen. Show Answer Correct Answer: B) Carbon dioxide oxygen. 22. During inhalation, our lungs ..... A) EXPAND. B) CONTRACT. C) All the above. D) None of the above. Show Answer Correct Answer: A) EXPAND. 23. 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. 24. 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. 25. Why is oxygen important in the process of respiration? A) Oxygen is used to produce carbon dioxide during respiration. B) Oxygen is not important in the process of respiration. C) Oxygen is only important for plants, not for animals. D) Oxygen is needed for the final step of cellular respiration, where it acts as the final electron acceptor in the electron transport chain. Show Answer Correct Answer: D) Oxygen is needed for the final step of cellular respiration, where it acts as the final electron acceptor in the electron transport chain. 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