This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 6 Respiration In Organisms – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 6 Respiration In Organisms Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. After heavy exercise, due to the accumulation of ..... substance, we get muscle cramps A) Malaic acid. B) Fumaric acid. C) Lipoic acid. D) Lactic acid. Show Answer Correct Answer: D) Lactic acid. 2. An adult human being at rest breathes in and out ..... times in a minute A) 12-15. B) 16-18. C) 15-18. D) 14-18. Show Answer Correct Answer: C) 15-18. 3. To get the most ATP molecules for energy in cellular respiration, you have to have lots of? A) Hydrogen. B) Oxygen. C) Carbon dioxide. D) Water. Show Answer Correct Answer: B) Oxygen. 4. Which organisms can perform anaerobic respiration? A) Only plants. B) Only humans. C) Yeast and bacteria. D) All animals. Show Answer Correct Answer: C) Yeast and bacteria. 5. Nostril-trachea-X-bronchioles-alveolus.So X is, A) Lung. B) Blood capillary. C) Bronchus. D) Larynx. Show Answer Correct Answer: C) Bronchus. 6. What are the two main types of respiration? A) Aerobic respiration and anaerobic respiration. B) Oxidative phosphorylation and glycolysis. C) Photosynthesis and fermentation. D) Cellular respiration and combustion. Show Answer Correct Answer: A) Aerobic respiration and anaerobic respiration. 7. Some times when we do heavy exercise, anaerobic respiration takes place in our muscles. What is produced during this process? A) Alcohol and Carbon dioxide. B) Lactic acid and alcohol. C) Lactic acid and carbon dioxide. D) Lactic acid only. Show Answer Correct Answer: C) Lactic acid and carbon dioxide. 8. Carbon dioxide and water are A) Reactants of cell respiration. B) Products of cell respiration. C) All the above. D) None of the above. Show Answer Correct Answer: B) Products of cell respiration. 9. The Process that involves the breakdown of food which leads to the release of ..... in living organisms is called respiration. A) Mass. B) Energy. C) Work. D) None of the above. Show Answer Correct Answer: B) Energy. 10. Plant can die if overwater? A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 11. Which of these best explains why predators need plants, such as grass, in their ecosystem? A) Plants are a large part of their diets. B) Plants provide safety for predators. C) Plants break down the organisms that the predators eat. D) Plants provide food for their animals that the predators eat. Show Answer Correct Answer: D) Plants provide food for their animals that the predators eat. 12. The dome shaped structure called ..... forms the base of the chest cavity. A) Lungs. B) Diaphragm. C) Diaphramg. D) Alveolus. Show Answer Correct Answer: B) Diaphragm. 13. Plants respire through ..... A) Cells. B) Stomata. C) Gills. D) Cell membrane. Show Answer Correct Answer: B) Stomata. 14. The process of breakdown of food in the cell with the release of energy is called ..... respiration. A) Aerobic. B) Cellular. C) Anaerobic. D) None of the above. Show Answer Correct Answer: B) Cellular. 15. An example of aerobes is A) Cat. B) Dog. C) Humans. D) All of these. Show Answer Correct Answer: D) All of these. 16. Which gas is given out during exhalation? A) Oxygen. B) Nitrogen. C) Carbon dioxide. D) All of these. Show Answer Correct Answer: C) Carbon dioxide. 17. Choose which among the following can breathe through lungs as well as through skin? A) Fish. B) Frog. C) Earthworm. D) Dolphin. Show Answer Correct Answer: B) Frog. 18. Which best describes how organisms process materials to gain energy for life processes? A) Oxygen is broken down in a chemical reaction with sugars to release energy. B) Sugars are broken down in a chemical reaction with oxygen to release energy. C) Vitamins and minerals are used to build complex molecules that store energy. D) Vitamins and minerals are used to break down complex molecules that store energy. Show Answer Correct Answer: B) Sugars are broken down in a chemical reaction with oxygen to release energy. 19. What is the main goal of cell respiration? A) To break down glucose in the form of ATP. B) To make ATP that we use for energy. C) To create CO2 for plants. D) Respiration is a byproduct of photosynthesis. Show Answer Correct Answer: A) To break down glucose in the form of ATP. 20. Why do whales and dolphins often come up to the water surface? A) To swim. B) To get more sunlight. C) To breathe. D) To get food. Show Answer Correct Answer: C) To breathe. 21. The process that converts food (glucose) into energy is called A) Cellular Respiration. B) Photosynthesis. C) Chloroplast. D) Carbon dioxide. Show Answer Correct Answer: A) Cellular Respiration. 22. Aerobic respiration ..... A) Does not require CO2. B) Requires CO2. C) Does not require oxygen. D) Requires oxygen. Show Answer Correct Answer: D) Requires oxygen. 23. Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process? A) Alcohol & lactic acid. B) Alcohol and carbon-dioxide. C) Lactic acid & carbon dioxide. D) Lactic acid only. Show Answer Correct Answer: D) Lactic acid only. 24. What is the cellular respiration chemical equation? A) C6H12O6 + 6O2 6CO2+6H2O + energy. B) C12HO6 + 6C2 5CO2+6H2O + energy. C) C6H12O6 + 6O2 energy. D) C612O6 + 6O2 12HO2 + energy. Show Answer Correct Answer: A) C6H12O6 + 6O2 6CO2+6H2O + energy. 25. Oxygen is released into the air by A) The sun. B) Animals. C) Volcanoes. D) Plants. Show Answer Correct Answer: D) Plants. ← PreviousNext →Related QuizzesClass 7 Science Chapter 6 Respiration In Organisms Quiz 1Class 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 10Class 7 Science Chapter 6 Respiration In Organisms Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books