This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 6 Respiration In Organisms – Quiz 44 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 6 Respiration In Organisms Quiz 44 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Every time you exhale (breathe out), your body is getting rid of ..... A) Glucose. B) Protein. C) Carbon dioxide. D) Oxygen. Show Answer Correct Answer: C) Carbon dioxide. 2. Healthy condition of lungs can be determined by ..... A) Running. B) Walking. C) Chest expansion. D) All the above. Show Answer Correct Answer: C) Chest expansion. 3. The process of cellular respiration A) Is performed only by organisms that are incapable of photosynthesis. B) Is performed by autotrophs and heterotrophs. C) All the above. D) None of the above. Show Answer Correct Answer: B) Is performed by autotrophs and heterotrophs. 4. Whenever we feel drowsy or sleepy, we start yawning. Why? A) When we feel the sleepy rate of respiration slows down. Because of this lungs will not get enough oxygen and we yawn. B) Out of Syllabus. C) Yawning provides extra carbon dioxide to the body which helps us in staying awake. D) Yawning provides extra nitrogen to the body which helps us in staying awake. Show Answer Correct Answer: A) When we feel the sleepy rate of respiration slows down. Because of this lungs will not get enough oxygen and we yawn. 5. The percentage of oxygen in inhaled air is 21%. True or False? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 6. The first step of cellular respiration, called glycolysis, occurs in the ..... of all cells. A) Cellular respiration. B) Cytoplasm. C) Mitochondria. D) Glycolysis. Show Answer Correct Answer: B) Cytoplasm. 7. Which of the following are plant waste/s? A) Latex. B) Rubber. C) Oxygen. D) All of the above. Show Answer Correct Answer: D) All of the above. 8. Diaphragm is present in the ..... of the chest cavity A) Floor. B) Roof. C) Right. D) None of the above. Show Answer Correct Answer: A) Floor. 9. During heavy exercise the breathing rate declines. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 10. What is the role of decomposers in the oxygen cycle? A) Consume carbon dioxide and nutrients from the environment. B) Release oxygen and water vapor into the environment. C) Release carbon dioxide and nutrients back into the environment. D) Absorb oxygen from the environment. Show Answer Correct Answer: C) Release carbon dioxide and nutrients back into the environment. 11. Name the process by which animals take in oxygen and release carbon dioxide. A) Digestion. B) Excretion. C) Respiration. D) Photosynthesis. Show Answer Correct Answer: C) Respiration. 12. Name organs of the respiratory system A) Lungs. B) Nostrils. C) Alveoli. D) A and B. E) Name of these. Show Answer Correct Answer: D) A and B. 13. Fish A) Gills. B) Skin. C) Trachea. D) Air spaces. Show Answer Correct Answer: A) Gills. 14. What are the end products of anaerobic respiration in animals? A) Proteins and fats. B) Lactic acid or ethanol and carbon dioxide. C) Water and carbon dioxide. D) Glucose and oxygen. Show Answer Correct Answer: B) Lactic acid or ethanol and carbon dioxide. 15. Insects have six ..... , which are found on the thorax. A) Heads. B) Abdomen. C) Legs. D) Feelers. Show Answer Correct Answer: C) Legs. 16. On inhaling the diaphragm moves A) Down. B) Up. C) Left. D) Right. Show Answer Correct Answer: A) Down. 17. Roots take up air from the air spaces present between the soil particles. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. Inhalation occurs when diaphragm moves ..... and ribs move upward and ..... A) Downward, inward. B) Upward, inward. C) Downward, outward. D) Upward, outward. Show Answer Correct Answer: C) Downward, outward. 19. Aquatic plants respire by absorbing A) Oxygen from air. B) Dissolved oxygen in water. C) Sunlight. D) Carbon dioxide. Show Answer Correct Answer: B) Dissolved oxygen in water. 20. What is the difference between external and internal respiration? A) External respiration is the process of digestion; internal respiration is the exchange of nutrients. B) External respiration occurs in the lungs; internal respiration occurs in body tissues. C) External respiration happens during exercise; internal respiration occurs at rest. D) External respiration occurs in the heart; internal respiration occurs in the lungs. Show Answer Correct Answer: B) External respiration occurs in the lungs; internal respiration occurs in body tissues. 21. The organ of locomotion in Euglena is ..... A) Flagella. B) Cilia. C) Pseudopodia. D) Predictment. Show Answer Correct Answer: A) Flagella. 22. Food can also be broken down without using oxygen. This is called A) Anaerobic Respiration. B) Cellular Respiration. C) Aerobic Respiration. D) None of These. Show Answer Correct Answer: A) Anaerobic Respiration. 23. Earthworm breath through? A) Gills. B) Skin. C) Lungs. D) Spiracles. Show Answer Correct Answer: B) Skin. 24. Along with energy, the product(s) of anaerobic respiration in yeast is/are A) I. Carbon dioxide. B) Ii. Alcohol. C) Iii. Water. D) Iv. Both (i) and (ii). Show Answer Correct Answer: D) Iv. Both (i) and (ii). 25. Neither photosynthesis & respiration require water as a reactant. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. ← 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