This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 6 Respiration In Organisms – Quiz 27 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 6 Respiration In Organisms Quiz 27 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Yeast and bacteria perform A) Aerobic Respiration. B) Anerobic Respiration. C) Fermentation. D) None of the above. Show Answer Correct Answer: B) Anerobic Respiration. 2. The part of respiratory system which branches A) Nasal cavity. B) Broccoli. C) Lungs. D) Trachea. Show Answer Correct Answer: C) Lungs. 3. What gas do producers need in order to perform photosynthesis? A) Oxygen. B) Carbon dioxide. C) Hydrogen. D) Nitrogen. Show Answer Correct Answer: B) Carbon dioxide. 4. An anaerobic organism A) Ant. B) Yeast. C) Human. D) Lizard. Show Answer Correct Answer: B) Yeast. 5. The products 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: B) Water and carbon dioxide. 6. Inhaled air contains ..... % of oxygen and ..... % of carbondioxide. A) 21 and 0.04. B) 0.04 and 21. C) 16and 4.4. D) 4.4 and 16. Show Answer Correct Answer: A) 21 and 0.04. 7. The process of breathing in air is called ..... A) Inspiration. B) Expiration. C) Breathing. D) No answer. Show Answer Correct Answer: A) Inspiration. 8. ..... prevents collapsing of trachea. A) Diaphragm. B) Ribs. C) Muscles. D) Cartilaginous rings. Show Answer Correct Answer: D) Cartilaginous rings. 9. Match the column:1) Pigeon a) lungs2) Cockroach b) tracheae3) Earthworm c) skin4) Fish d)gills A) Pigeon-a) lungs2) Cockroach-b) tracheae3) Earthworm-c) skin4) Fish-d)gills. B) Pigeon-d) gills2) Cockroach-a) lungs 3) Earthworm-b) tracheae4) Fish-c) skin. C) Pigeon-c) skin2) Cockroach-d) gills3) Earthworm-a) lungs4) Fish-b) tracheae. D) Pigeon-a) lungs2) Cockroach-d) gills3) Earthworm-b) tracheae4) Fish-c) skin. Show Answer Correct Answer: A) Pigeon-a) lungs2) Cockroach-b) tracheae3) Earthworm-c) skin4) Fish-d)gills. 10. How does oxygen enter the bloodstream? A) Oxygen enters the bloodstream via the stomach. B) Oxygen enters the bloodstream through the alveoli in the lungs. C) Oxygen is absorbed through the skin. D) Oxygen is transported by red blood cells from the liver. Show Answer Correct Answer: B) Oxygen enters the bloodstream through the alveoli in the lungs. 11. Gills of a fish are equipped with blood vessels to help in the exchange of gases A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 12. Which of the following is present in a higher percentage in inhaled air than in exhaled air? A) Nitrogen. B) Oxygen. C) Carbon dioxide. D) Hydrogen. Show Answer Correct Answer: B) Oxygen. 13. What % (percentage) of oxygen is inhaled and exhaled during breathing? A) 0.004%. B) 21%. C) 4.4%. D) 16.4%. Show Answer Correct Answer: B) 21%. 14. What pigment in the leaf captures energy from the sun? A) Carbon. B) Chlorophyll. C) Air. D) Chloroplast. Show Answer Correct Answer: B) Chlorophyll. 15. Structural and functional unit of lungs are called ..... A) Bronchi. B) Alveoli. C) Nostrils. D) Trachea. Show Answer Correct Answer: B) Alveoli. 16. Do plants have a respiratory system? A) YES. B) NO. C) All the above. D) None of the above. Show Answer Correct Answer: B) NO. 17. What is the final product of cellular respiration? A) Glucose. B) Water. C) Carbon dioxide. D) ATP. Show Answer Correct Answer: D) ATP. 18. Which acid is formed in muscle cells during anaerobic respiration? A) Lactic Acid. B) Acetic Acid. C) Hydrochloric acid. D) Sulphuric acid. Show Answer Correct Answer: A) Lactic Acid. 19. The energy of food which we eat is released slowly inside our body by the process called: A) Transpiration. B) Pollination. C) Restoration. D) Respiration. Show Answer Correct Answer: D) Respiration. 20. Cells need energy to work A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 21. Where does the process of respiration take place in a cell? A) Cell membrane. B) Endoplasmic reticulum. C) Nucleus. D) Mitochondria. Show Answer Correct Answer: D) Mitochondria. 22. Which statement is FALSE about functions of the transport system in organisms A) Transports substances needed by body and plant cells. B) Eliminates carbon dioxide and other waste products from body cells. C) Transports products of photosynthesis. D) To carry out all life processes in organisms. Show Answer Correct Answer: D) To carry out all life processes in organisms. 23. After heavy exercise, due to the accumulation of which substance we get muscle cramps?(a) Malaic acid(b) Fumaric acid(c) Lipoic acid(d) Lactic acid A) A. B) B. C) C. D) D. Show Answer Correct Answer: D) D. 24. The rate of breathing in aquatic organisms is much faster than that seen in terrestrial organisms because ..... A) They are not able to breathe properly under water. B) They want to scare off other aquatic animals. C) The amount of dissolved oxygen is low compared to the amount of oxygen in the air. D) None of the above. Show Answer Correct Answer: C) The amount of dissolved oxygen is low compared to the amount of oxygen in the air. 25. Example of anaerobic resepiration A) Yeast. B) Butter. C) Both. D) None of the above. Show Answer Correct Answer: A) Yeast. ← 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