This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 6 Respiration In Organisms – Quiz 28 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 6 Respiration In Organisms Quiz 28 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Roots A) Gills. B) Skin. C) Trachea. D) Air spaces. Show Answer Correct Answer: D) Air spaces. 2. What are the similarities and differences between respiration in plants and animals? A) Both use oxygen and produce carbon dioxide, but plants also undergo photosynthesis to produce their own food. B) Plants and animals both use nitrogen for respiration. C) Plants and animals both use photosynthesis to produce their own food. D) Plants use carbon dioxide and produce oxygen, while animals use oxygen and produce carbon dioxide. Show Answer Correct Answer: A) Both use oxygen and produce carbon dioxide, but plants also undergo photosynthesis to produce their own food. 3. This is the process when sugar is broken down into energy, carbon dioxide, and water. A) Homeostasis. B) Cellular respiration. C) Ingestion. D) Digestion. Show Answer Correct Answer: B) Cellular respiration. 4. Lime water turns milky when it react with A) Carbon dioxide. B) Oxygen. C) Nitrogen. D) Carbon. Show Answer Correct Answer: A) Carbon dioxide. 5. Which structure closes off trachea during swallowing? A) Pneumatic. B) Pharynx. C) Larynx. D) Epiglottis. Show Answer Correct Answer: D) Epiglottis. 6. Hydrilla is a ..... A) Hydrophyte. B) Xerophyte. C) All the above. D) None of the above. Show Answer Correct Answer: A) Hydrophyte. 7. Because oxygen is used, fermentation makes more ATP than cellular respiration does. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 8. The air sacs that are covered with capillaries where gas exchange takes place A) Bronchi. B) Oxygen. C) Lungs. D) Alveoli. Show Answer Correct Answer: D) Alveoli. 9. Yeast is used in the wine and beer industries because it respires A) Aerobically producing oxygen. B) Anaerobically producing alcohol. C) All the above. D) None of the above. Show Answer Correct Answer: B) Anaerobically producing alcohol. 10. ..... gas is exhaled during breathing A) Nitrogen. B) Oxygen. C) Carbon dioxide. D) None of the above. Show Answer Correct Answer: C) Carbon dioxide. 11. Aerobic means A) Without oxygen. B) With oxygen. C) Without effort. D) None of the above. Show Answer Correct Answer: B) With oxygen. 12. What is the end product of glucose in the absence of oxygen in muscle cells? A) Carbon dioxide. B) Lactic acid. C) Ethanol. D) Water. Show Answer Correct Answer: B) Lactic acid. 13. Inhaled air contains A) 21% of O2, 0.04% of Co2. B) 16% of O2, 4.4% of CO2. C) All the above. D) None of the above. Show Answer Correct Answer: A) 21% of O2, 0.04% of Co2. 14. If soil contains greater proportion of big particles it is called A) Loamy Soil. B) Sandy Soil. C) Clayey Soil. D) None of these. Show Answer Correct Answer: B) Sandy Soil. 15. Rate of transpiration is low in A) .water plants. B) Forest plant. C) Desert plant. D) All of the above. Show Answer Correct Answer: C) Desert plant. 16. Which best describes how organisms obtain energy from food? A) Food reacts with water to release energy. B) Food reacts with oxygen to release energy. C) Food reacts with sunlight to release energy. D) Food reacts with carbon dioxide to release energy. Show Answer Correct Answer: B) Food reacts with oxygen to release energy. 17. Insects have several openings on lateral sides of their bodies which lead to air tubes. These openings are called- A) Tracheae. B) Spiracles. C) Lungs. D) Gills. Show Answer Correct Answer: B) Spiracles. 18. When Breathing in Diaphragm moves? A) Right. B) Left. C) Up. D) Down. Show Answer Correct Answer: D) Down. 19. What is Pyruvate? A) Carbon less molecule. B) 10 Carbon molecule. C) Many Carbon Molecule. D) 3 Carbon Molecule. Show Answer Correct Answer: D) 3 Carbon Molecule. 20. ..... forms the floor of chest cavity A) Ribs. B) Diaphragm. C) Alveoli. D) Trachea. Show Answer Correct Answer: B) Diaphragm. 21. The shivering mechanism in bumblebees often serves the same purpose as it does in mammals. During which condition will the action of shivering most help a bumblebee to maintain homeostasis? A) Decrease in available oxygen. B) Low environmental temperature. C) Uncontrolled rise in core temperature. D) Depletion of oxygen in muscle tissues. Show Answer Correct Answer: B) Low environmental temperature. 22. A person breathes ..... while running A) Slow. B) Fast. C) Moderate. D) Very slow. Show Answer Correct Answer: B) Fast. 23. The left lung is smaller than right lung because it needs to make a compartment for the ..... A) Diaphragm. B) Heart. C) Chest cavity. D) None of these. Show Answer Correct Answer: B) Heart. 24. Oxygen mix with our blood(Haemoglobin) which will form ..... A) Plasma. B) Glucose. C) Oxyhaemoglobin. D) Blood cells. Show Answer Correct Answer: C) Oxyhaemoglobin. 25. In photosynthesis energy from the sun is transferred to ..... A) Carbon dioxide. B) Glucose. C) Oxygen. D) Water. Show Answer Correct Answer: B) Glucose. ← 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