This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 6 Respiration In Organisms – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 6 Respiration In Organisms Quiz 21 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the role of sunlight in photosynthesis? A) Sunlight is used as a source of carbon dioxide in photosynthesis. B) Sunlight is responsible for the production of oxygen in photosynthesis. C) Sunlight provides the energy for photosynthesis. D) Sunlight is used to convert glucose into energy in photosynthesis. Show Answer Correct Answer: C) Sunlight provides the energy for photosynthesis. 2. What is exhalation? A) Exhalation refers to the exchange of gases in the bloodstream. B) Inhalation is the act of breathing in. C) Exhalation is the process of digesting food. D) Exhalation is the act of breathing out. Show Answer Correct Answer: D) Exhalation is the act of breathing out. 3. Name the term which means 'taking in of air rich in oxygen into the body'. A) Exhalation. B) Inhalation. C) Breathing. D) Respiration. Show Answer Correct Answer: B) Inhalation. 4. Which part of Respiratory System carries oxygenated blood from the lungs to the heart? A) Pulmonary arteries. B) Alveoli. C) Bronchi. D) Pulmonary veins. Show Answer Correct Answer: D) Pulmonary veins. 5. The reactants of cellular respiration are A) Water and oxygen. B) Water and carbon dioxide. C) Carbon dioxide and oxygen. D) Sugar and oxygen. Show Answer Correct Answer: D) Sugar and oxygen. 6. N. In fishes it takes place through gills and in insects through the ..... A) TRACHEA. B) SKIN. C) GILLS. D) NOSE. Show Answer Correct Answer: A) TRACHEA. 7. In cockroach air enters through A) Lungs. B) Gills. C) Spiracles. D) Skin. Show Answer Correct Answer: C) Spiracles. 8. On an average adult human being at rest breaths in a minute A) 21-25 times. B) 18-21 times. C) 15-18 times. D) 11-16 times. Show Answer Correct Answer: C) 15-18 times. 9. During exhalation, the ribs move A) Downwards. B) Outwards. C) Upwards. D) None of the above. Show Answer Correct Answer: A) Downwards. 10. Organism breath with the help of machine. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 11. In which option below, is written about spiracles A) Small openings on the sides of the body of cockroach. B) Big openings on the sides of the body of cockroach. C) None of these. D) I don't know the answer. Show Answer Correct Answer: A) Small openings on the sides of the body of cockroach. 12. Name the type of respiration that causes muscle cramps. A) Aerobic respiration. B) Anaerobic respiration. C) Both (a) and (b). D) None of these. Show Answer Correct Answer: B) Anaerobic respiration. 13. Both photosynthesis & respiration require sunlight. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 14. Insects have a special network of tubes called A) I. gills. B) 2.tracheae. C) 3.spiracles. D) Iv. lungs. Show Answer Correct Answer: B) 2.tracheae. 15. Which of these are the characteristics of a living organism? A) They grow. B) They reproduce. C) They respond to stimuli. D) All of the above. Show Answer Correct Answer: D) All of the above. 16. Inhalation and exhalation of air is called ..... A) Aerobic respiration. B) Respiration. C) Breathing. D) Anaerobic respiration. Show Answer Correct Answer: C) Breathing. 17. Which animal breath through skin and lungs A) Fish. B) Frog. C) Snake. D) Earthworm. Show Answer Correct Answer: B) Frog. 18. Select the correct statement out of the following: A) External respiration takes place inside the cells. B) Internal respiration is a mechanical process. C) During aerobic respiration, oxidation of glucose occurs to produce carbon dioxide, water and energy. D) Anaerobic respiration in muscles of humans produces ethanol and carbon dioxide. Show Answer Correct Answer: C) During aerobic respiration, oxidation of glucose occurs to produce carbon dioxide, water and energy. 19. Which organ is damaged by smoking? A) Lungs. B) Heart. C) Kidney. D) Liver. Show Answer Correct Answer: A) Lungs. 20. The tracheal tubes have openings called A) Lungs. B) Spiracles. C) Gills. D) Trachea. Show Answer Correct Answer: B) Spiracles. 21. The products of photosynthesis inhibit the reactants in cellular respiration in the presence of light. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 22. Breathing rate in human beings in normal conditions is A) 12-15 times. B) 15-18 times. C) 21-24 times. D) 26-30 times. Show Answer Correct Answer: B) 15-18 times. 23. The basic structural and functional unit of a living organism is ..... A) Tissue. B) Organ. C) Cell. D) Organ system. Show Answer Correct Answer: C) Cell. 24. Animals get the materials for cellular respiration from: A) Their food and the air. B) Water and their food. C) Air and water. D) The sun and water. Show Answer Correct Answer: A) Their food and the air. 25. Oxygen and carbon dioxide move into and out of cells. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. ← 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