This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 6 Respiration In Organisms – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 6 Respiration In Organisms Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When breakdown of glucose takes place in the presence of oxygen the respiration is called ..... A) Anaerobic. B) Aerobic. C) Breathing microbe. D) None of the above. Show Answer Correct Answer: B) Aerobic. 2. What is the process of converting sunlight into energy in plants? A) Photosynthesis. B) Energy. C) Cellular respiration. D) Growth. Show Answer Correct Answer: A) Photosynthesis. 3. It is also called as the voicebox A) Larynx. B) Bronchi. C) Pharynx. D) Alveoli. Show Answer Correct Answer: A) Larynx. 4. During heavy exercise, we get cramps in the legs due to the accumulation of A) (i) carbon dioxide. B) (ii) lactic acid. C) (iii) alcohol. D) (iv) water. Show Answer Correct Answer: B) (ii) lactic acid. 5. Cellular respiration occurs in the mitochondria of eukaryotic cells and requires ..... A) Cellular Respiration. B) Cytoplasm. C) Mitochondria. D) Glycolysis. E) Oxygen. Show Answer Correct Answer: E) Oxygen. 6. Rabbits eat grass and foxes eat rabbits.What would cause the highest increase in the number of rabbits? A) Less grass and fewer foxes. B) Less grass and more foxes. C) More grass and fewer foxes. D) More grass and more foxes. Show Answer Correct Answer: C) More grass and fewer foxes. 7. Many different chemical reactions occur during cellular respiration. It is a process that requires certain resources to get started and in turn it produces resources when it is finished. With all of that being said, why do organisms want to perform cellular respiration? What is the main purpose? A) To make H2O from CO2. B) To harvest energy from food. C) To create much needed O2. D) To create glucose. Show Answer Correct Answer: B) To harvest energy from food. 8. In higher animals, respiration occurs through ..... A) Nostrils. B) Kidneys. C) Gills. D) Lungs. Show Answer Correct Answer: D) Lungs. 9. On an average breathing rate of adult human being, at rest is A) Above 25 times per minute. B) Less than 10 times per minute. C) 15-18 times per minute. D) None of these. Show Answer Correct Answer: C) 15-18 times per minute. 10. What is the process by which plants release oxygen into the atmosphere? A) Photosynthesis. B) Fermentation. C) Transpiration. D) Respiration. Show Answer Correct Answer: A) Photosynthesis. 11. The reactants of photosynthesis are A) Sugar and oxygen. B) Water and carbon dioxide. C) Carbon dioxide and oxygen. D) Sugar and carbon dioxide. Show Answer Correct Answer: B) Water and carbon dioxide. 12. 2What is the percentage of oxygen in the inhaled air? A) 1.21%. B) 78%. C) 0.04%. D) 28%. Show Answer Correct Answer: A) 1.21%. 13. These organs help our body to breath except A) Nasal cavity. B) Lungs. C) Trachea. D) Mouth. Show Answer Correct Answer: D) Mouth. 14. Which of the following statement is correct for anaerobic respiration? A) Food is broken down in the absence of oxygen to release energy. B) It is a small process compared to aerobic respiration. C) Breakdown of food occurs in presence of oxygen. D) It produces large amount of energy compared to aerobic respiration. Show Answer Correct Answer: A) Food is broken down in the absence of oxygen to release energy. 15. In humans, breathing rate is fastest during A) Running. B) Walking. C) Sleeping. D) Talking. Show Answer Correct Answer: A) Running. 16. Trachea is also called as A) Food pipe. B) Wind pipe. C) Epiglottis. D) Glottis. Show Answer Correct Answer: B) Wind pipe. 17. What are the primary sources of oxygen in the atmosphere? A) Burning of fossil fuels. B) Photosynthesis and photodissociation of water vapor. C) Volcanic eruptions. D) Chemical reactions in the Earth's core. Show Answer Correct Answer: B) Photosynthesis and photodissociation of water vapor. 18. Choose the correct combinations of functions of breathing: A) . Provides O2 to the body and breaks down food to release energy. B) . Breaks down food to release energy and helps the body to get rid of CO2. C) . Provides O2 to the body and helps the body to get rid of CO2. D) . Breaks down food to release energy and produces water in the cells. Show Answer Correct Answer: C) . Provides O2 to the body and helps the body to get rid of CO2. 19. Choose the flow of cell organizations that are true, the Correct Cell Organization Flow A) Tissues-cells-organs-systems-organisms. B) Sel-Tisu-Organ-Organisma-Sistem. C) Cells-tissues-organs-systems-organisms. D) None of the above. Show Answer Correct Answer: C) Cells-tissues-organs-systems-organisms. 20. Aerobic respiration is the respiration that occurs in the ..... of oxygen and is present in ..... A) Absence, bacteria. B) Absence, most plants. C) Presence, yeast. D) Presence, most plants. Show Answer Correct Answer: D) Presence, most plants. 21. Which of the following organisms depend on the process of cellular respiration for survival? A) Animals, some algae, and phytoplankton, but not plants. B) Only animals, since they are the only organisms that go through the process of cellular respiration. C) Humans only. D) All organisms that break down glucose for food; including plants and animals. Show Answer Correct Answer: D) All organisms that break down glucose for food; including plants and animals. 22. A shark breathes through the ..... A) Lungs. B) Skin. C) Gills. D) Air holes. Show Answer Correct Answer: C) Gills. 23. ..... is a box shaped structure just above the trachea A) Windpipe. B) Trachea. C) Larynx. D) Alveoli. Show Answer Correct Answer: C) Larynx. 24. The breakdown of food (glucose) in the presence of oxygen to release energy is called A) Internal respiration. B) Breathing. C) Cellular respiration. D) Non of the above. Show Answer Correct Answer: C) Cellular respiration. 25. During exhalation the diaphragm moves up and the volume of air decreases in the lungs. 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 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