This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 6 Respiration In Organisms – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 6 Respiration In Organisms Quiz 17 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which cell process releases oxygen? A) Photosynthesis. B) Cellular Respiration. C) Breathing. D) Fermentation. Show Answer Correct Answer: A) Photosynthesis. 2. Which of the following is correct about respiration? A) Occurs during day and night. B) Plant only. C) Need sunlight. D) Use carbon dioxide (Carbon dioxide in). Show Answer Correct Answer: A) Occurs during day and night. 3. An adult human being at rest breathes in and out A) 15-18. B) 9-12. C) 21-24. D) 30-33. Show Answer Correct Answer: A) 15-18. 4. What is aerobic respiration? A) None of these. B) When breakdown of glucose occurs with the use of oxygen. C) When breakdown of glucose occurs without the use of oxygen. D) When breakdown of glucose does not occurs. Show Answer Correct Answer: B) When breakdown of glucose occurs with the use of oxygen. 5. Carbon dioxide enters the leave through what opening? A) Root. B) Stem. C) Stomata. D) Stomach. Show Answer Correct Answer: C) Stomata. 6. Which of the following is a product of cellular respiration? A) Radiant Energy. B) Oxygen. C) Glucose. D) Water. Show Answer Correct Answer: D) Water. 7. What is the chemical equation for aerobic respiration? A) 2h2o + 2nadh + 6O2 $\rightarrow$ 6h2o + 2nad + + 4h + + 3ATP. B) C6H12O6 + 6O2 $\rightarrow$ 6CO2 + 6H2O + Energy. C) C6H12O6 + 6O2 $\rightarrow$ 6CO2 + 6H2O + ATP. D) C6H12O6 + 6O2 $\rightarrow$ 6CO2 + 6H2O + Heat. Show Answer Correct Answer: B) C6H12O6 + 6O2 $\rightarrow$ 6CO2 + 6H2O + Energy. 8. The two upper chambers are called A) Aorta. B) Atrium. C) Ventricle. D) None of the above. Show Answer Correct Answer: B) Atrium. 9. In which organisms Anarobic respirationis present? A) Bacteria. B) Yeast. C) Fungi. D) Humans. Show Answer Correct Answer: B) Yeast. 10. What happens to the temperature of inhaled air when it reaches the lungs? A) It heats up significantly. B) It becomes the same as body temperature. C) It remains the same. D) It cools down. Show Answer Correct Answer: B) It becomes the same as body temperature. 11. Scientists are studying cellular respiration in a river ecosystem that has plants, animals, and decomposers (which consume dead things). Which group or groups of organisms in the river carry out cellular respiration? A) Plants. B) Animals and decomposers. C) All organisms in the river. D) Animals. Show Answer Correct Answer: C) All organisms in the river. 12. Which part of the Respiratory System plays a major role in speech? A) Nose. B) Pharynx. C) Larynx. D) Trachea. Show Answer Correct Answer: C) Larynx. 13. Rings of cartilage present in the throat ensure that A) The air passage does not collapse. B) The throat is filled with mucus. C) The throat has fine hairs. D) None of the above. Show Answer Correct Answer: A) The air passage does not collapse. 14. Plants need sunlight to ..... A) Breathe. B) Keep the plant warm. C) Make food for the plant. D) Plants do not need sunlight. Show Answer Correct Answer: C) Make food for the plant. 15. Identify the organism (s) that depend on photosynthesis for survival A) Plants, algae, and phytoplankton. B) Mammals. C) Amphibians and reptiles. D) Every living organism, in some manner, depends on photosynthesis. Show Answer Correct Answer: D) Every living organism, in some manner, depends on photosynthesis. 16. When we inhale A) Our lungs expand and diaphragm moves downwards. B) Our lungs relax and diaphragm moves up. C) None of the above. D) All of these. Show Answer Correct Answer: A) Our lungs expand and diaphragm moves downwards. 17. During inhalation, the ribcage is A) Upward and outward. B) Inward and downward. C) All the above. D) None of the above. Show Answer Correct Answer: A) Upward and outward. 18. Which of the following are the reactants of respiration? A) O $ _ {2} $ + CO $ _ {2} $. B) H$_{2}$O + Glucose$_{ }$. C) Glucose + O$_{2}$. D) H$_{2}$O + CO$_{2 }$+ Sunlight. Show Answer Correct Answer: C) Glucose + O$_{2}$. 19. Muscular floor of chest cavity A) Diaphragm. B) Lungs. C) Trachea. D) Nostrils. Show Answer Correct Answer: A) Diaphragm. 20. Which most accurately describes how plants and animals obtain the energy they need for growth and survival? A) Molecules are broken down during respiration to release stored energy. B) Molecules are broken down during photosynthesis to release stored energy. C) Animals produce energy through photosynthesis, while plants produce energy through respiration. D) Animals produce energy through respiration, while plants produce energy through photosynthesis. Show Answer Correct Answer: A) Molecules are broken down during respiration to release stored energy. 21. During exhalation diaphragm moves A) Down. B) Left. C) Right. D) Up. Show Answer Correct Answer: D) Up. 22. Yeasts can survive in the absence of air. They are called anaerobes A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 23. Green plants are producers that begin the flow of energy between organisms in a food web when they- A) Reproduce by generating seeds. B) Absorb water and nutrients through the soil. C) Release oxygen into the air. D) Make their own food using sunlight. Show Answer Correct Answer: D) Make their own food using sunlight. 24. Which equation best represents respiration? A) Sugar + Oxygen $\rightarrow$ Carbon dioxide + Water + Energy. B) Carbon dioxide + Water $\rightarrow$ Oxygen + Sugar + Energy. C) Oxygen + Water $\rightarrow$ Energy + Sugar + Carbon dioxide. D) Sugar + Energy + Water $\rightarrow$ Carbon Dioxide + Oxygen. Show Answer Correct Answer: A) Sugar + Oxygen $\rightarrow$ Carbon dioxide + Water + Energy. 25. Where in the cell does aerobic respiration take place? A) Nucleus. B) Cytoplasm. C) Mitochondria. D) Cell membrane. Show Answer Correct Answer: C) Mitochondria. ← 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