This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 6 Respiration In Organisms – Quiz 38 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 6 Respiration In Organisms Quiz 38 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The system that carries out the respiration process is ..... A) Urinary system. B) Nervous system. C) Digestive system. D) Respiratory system. Show Answer Correct Answer: D) Respiratory system. 2. 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. 3. ..... 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. 4. ..... is also known as windpipe A) Larynx. B) Trachea. C) Lungs. D) Diaphragm. Show Answer Correct Answer: B) Trachea. 5. 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. 6. Which molecule is a product of respiration? A) Carbon dioxide. B) Glucose. C) Oxygen. D) Protein. Show Answer Correct Answer: A) Carbon dioxide. 7. Where does photosynthesis occur in plants? A) Chloroplasts. B) Nucleus. C) Mitochondria. D) Vacuole. Show Answer Correct Answer: A) Chloroplasts. 8. Yeast is used in the wine industry because it respires- A) Aerobically producing alcohol. B) Aerobically producing Carbon dioxide. C) Anaerobically producing Carbon dioxide. D) Anaerobically producing alcohol. Show Answer Correct Answer: D) Anaerobically producing alcohol. 9. 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 %. 10. 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. 11. 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. 12. Which is not a non-metal element? A) Argon. B) Sodium. C) Hydrogen. D) Nitrogen. Show Answer Correct Answer: B) Sodium. 13. 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. 14. The major source of oxygen for aquatic animals is A) Atmosphere. B) Soil. C) Water. D) Carbon dioxide. Show Answer Correct Answer: C) Water. 15. Tobacco chewing can result in A) Mouth Cancer. B) Lung Cancer. C) Bone Cancer. D) Leukemia. Show Answer Correct Answer: A) Mouth Cancer. 16. What is living as well as non-living? A) Amoeba. B) Virus. C) Bacteria. D) Humans. Show Answer Correct Answer: B) Virus. 17. The process by which organisms maintain homeostasis is known as A) Synthesis. B) Regulation. C) Respiration. D) Digestion. Show Answer Correct Answer: B) Regulation. 18. 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. 19. Breathing is a ..... process while respiration is a ..... process. A) Physical, chemical. B) Chemical, physical. C) Physical, physical. D) Chemical, chemical. Show Answer Correct Answer: A) Physical, chemical. 20. 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. 21. 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. 22. What chemical bond in ATP releases energy when broken? A) Phosphate. B) Sulfur. C) Oxygen. D) Potassium. Show Answer Correct Answer: A) Phosphate. 23. Human breathe through their ..... A) Gills. B) Nose. C) Stomata. D) Trachea. Show Answer Correct Answer: B) Nose. 24. 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. 25. The system that helps the body getting rid of harmful substances is ..... A) Digestive system. B) Urinary system. C) Nervous system. D) Reproductive system. Show Answer Correct Answer: B) Urinary system. ← 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