This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 6 Respiration In Organisms – Quiz 25 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 6 Respiration In Organisms Quiz 25 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A large, muscular sheet called ..... forms the floor of the chest cavity A) Alveoli. B) Rib Cage. C) Diaphragm. D) Bronchi. Show Answer Correct Answer: C) Diaphragm. 2. What is the ability to do work? A) Photosynthesis. B) Energy. C) Cellular respiration. D) Growth. Show Answer Correct Answer: B) Energy. 3. What is cutaneous respiration? A) Breathing through trachea. B) Breathing through gills. C) Breathing through skin. D) Breathing through lungs. Show Answer Correct Answer: C) Breathing through skin. 4. Yeast is used in wine and beer industry because it respires A) Aerobically producing oxygen. B) Anaerobically producing alcohol. C) Aerobically producing alcohol. D) Anaerobically producing oxygen. Show Answer Correct Answer: B) Anaerobically producing alcohol. 5. At night, when there is no photosynthesis occurring ..... elimination is the major exchange activity on. A) Oxygen. B) Carbon Dioxide Gas. C) Glucose. D) None of the above. Show Answer Correct Answer: B) Carbon Dioxide Gas. 6. Plants carry out photosynthesis only during inhalation. A) True. B) False. C) All of above. D) None of above. Show Answer Correct Answer: B) False. 7. The respiratory system works with the ..... to help with Cellular Respiration A) Nervous system. B) Circulatory System. C) Muscular System. D) Endocrine System. Show Answer Correct Answer: B) Circulatory System. 8. Short form of carbon dioxide is ..... A) CO. B) CD. C) Elbow. D) CO2. Show Answer Correct Answer: D) CO2. 9. The following word equation shows a chemical process that take place in an organism Y. What is organism Y?Glucose$\rightarrow$ Ethyl alcohol + carbon dioxide A) Algae. B) Protozoan. C) Yeast. D) Hydra. Show Answer Correct Answer: C) Yeast. 10. Yeast breaks down glucose into ..... and carbon dioxide. A) Alchohol. B) Energy. C) Food. D) Oxygen. Show Answer Correct Answer: A) Alchohol. 11. Decomposers like mushrooms get energy by- A) Producing their own food. B) Eating grass, fruit, and seeds. C) Breaking down dead organisms. D) Absorbing carbon dioxide from the air. Show Answer Correct Answer: C) Breaking down dead organisms. 12. During heavy exercise, we get cramps in our legs due to accumulation of- A) Formic acid. B) Lactic acid. C) Oxygen. D) Carbon dioxie. Show Answer Correct Answer: B) Lactic acid. 13. When we inhale air, it passes through our- A) Nostrils. B) Diaphragm. C) Lungs. D) Mouth. Show Answer Correct Answer: A) Nostrils. 14. The glucose used during respiration is provided by our A) Digestive system. B) Respiratory system. C) Circulatory system. D) None of the above. Show Answer Correct Answer: A) Digestive system. 15. Autotrophs capture the sun's energy using ..... A) Cellular respiration. B) Mitochondria. C) Chlorophyll. D) Glucose. Show Answer Correct Answer: C) Chlorophyll. 16. One gram mole of glucose on complete oxidation to CO2 and H2O produces about A) 686, 000 cal. B) 6, 860 cal. C) 6, 860, 000 cal. D) 68, 600 cal. Show Answer Correct Answer: A) 686, 000 cal. 17. One molecule needed for cellular respiration is A) Carbon dioxide. B) Water. C) Glucose. D) Cholorophyll. Show Answer Correct Answer: C) Glucose. 18. What is broken down during aerobic respiration? A) Carbohydrates. B) Fats. C) Glucose. D) Sugar. Show Answer Correct Answer: C) Glucose. 19. The number of times a person breaths in a minute is termed as the A) Breathing Rate. B) Pulse Rate. C) Respiration. D) None of these. Show Answer Correct Answer: A) Breathing Rate. 20. Energy is used by organisms to: A) Repair their bodies. B) Grow larger. C) Move. D) All of the above. Show Answer Correct Answer: D) All of the above. 21. The farmers sometimes loosen the soil because ..... A) It helps the root to respire through the air present in the space between soil particles. B) It helps plants to survive in high temperature. C) All the above. D) None of the above. Show Answer Correct Answer: A) It helps the root to respire through the air present in the space between soil particles. 22. What are the products of cellular respiration? A) Oxygen and sugar. B) Oxygen and water. C) Carbon dioxide and sugar. D) Carbon dioxide and water. Show Answer Correct Answer: D) Carbon dioxide and water. 23. The chemical reactions of photosynthesis occur in chloroplasts, the organelles in plant cells that convert light energy into ..... A) Waste. B) CO2. C) Food. D) Bacteria. Show Answer Correct Answer: C) Food. 24. Thin muscular membrane that separates the chest cavity from the abdominal cavity A) Diaphragm. B) Stomata. C) Trachea. D) None of these. Show Answer Correct Answer: A) Diaphragm. 25. Breakdown of glucose occurs with the use of oxygen is called? A) Aerobic respiration. B) Anaerobic respiration. C) Cellular respiration. D) Breathing rate. Show Answer Correct Answer: A) Aerobic respiration. ← PreviousNext →Related 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 8Class 7 Science Chapter 6 Respiration In Organisms Quiz 9Class 7 Science Chapter 6 Respiration In Organisms Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books