This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Respiration In Organisms > 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 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Describe the role of oceans in the oxygen cycle. A) Oceans have no role in the oxygen cycle. B) Oceans produce oxygen through volcanic activity. C) They produce a significant amount of the Earth's oxygen through photosynthesis by marine plants and phytoplankton. D) They absorb oxygen from the atmosphere and release it into the water. Show Answer Correct Answer: C) They produce a significant amount of the Earth's oxygen through photosynthesis by marine plants and phytoplankton. 2. In insects, exchange of gases takes place through? A) Spiracles. B) Stomata. C) Lungs. D) Gills. Show Answer Correct Answer: A) Spiracles. 3. Cellular Respiration, the process that organisms undergo to turn glucose into ATP (energy), takes place in the ..... A) Mitochondria. B) Cell wall. C) Chloroplast. D) Stomata. Show Answer Correct Answer: A) Mitochondria. 4. ..... occurred during the process of growing human since birth ..... happened during the growth of human sincerely birth A) Enlargement of the SELCELL enlargement. B) Pembahagian selCell division. C) Healing Selcell Restoration. D) None of the above. Show Answer Correct Answer: B) Pembahagian selCell division. 5. The blood vessel that brings oxygenated blood to heart from lungs A) Pulmonary vein. B) Postal cavel vein. C) Coronari artery. D) Pulmonary artery. Show Answer Correct Answer: A) Pulmonary vein. 6. Evaluate each statement and decide which one is TRUE. A) Glucose is product of photosynthesis and Oxygen is product of cell respiration. B) Oxygen is a product of photosynthesis and carbon dioxide is product of cell respiration. C) Carbon dioxide is product of cell respiration and ATP is product of photosynthesis. D) ATP is product of photosynthesis and Cell respiration is product of cell respiration. Show Answer Correct Answer: A) Glucose is product of photosynthesis and Oxygen is product of cell respiration. 7. Why do we get muscle cramps? A) Partial breakdown of glucose to produce lactic acid. B) Increased supply of oxygen to the muscles. C) Complete breakdown of glucose to produce lactic acid. D) Muscle cells respire in presence of oxygen. Show Answer Correct Answer: A) Partial breakdown of glucose to produce lactic acid. 8. What is the main purpose of cellular respiration? A) To break down glucose molecules. B) To release carbon dioxide. C) To produce energy for the cell. D) None of the above. Show Answer Correct Answer: C) To produce energy for the cell. 9. ..... is the energy currency for cellular processes. A) Glucose. B) ATP. C) Starch. D) None of the above. Show Answer Correct Answer: B) ATP. 10. What is the one main difference between fermentation & cellular respiration? A) Fermentation does not release energy, cellular respiration does. B) Fermentation does not depend on the sun, cellular respiration does. C) Fermentation does not require oxygen, cellular respiration does. D) Fermentation does not occur in animals, while cellular respiration does. Show Answer Correct Answer: C) Fermentation does not require oxygen, cellular respiration does. 11. How do plants breathe? A) Through the stem. B) Through the stomata. C) Through the chloroplast. D) None of the above. Show Answer Correct Answer: B) Through the stomata. 12. The lining of the nasal cavity is covered with a thin film of mucus. What is the importance of the mucus? A) It helps remove dust from the incoming air. B) It warms up the inhaled air. C) It lubricates the passage of air into the respiratory trac. D) It helps dissolve oxygen in the inhaled air for gas exchange. Show Answer Correct Answer: A) It helps remove dust from the incoming air. 13. Where is lactic acid formed A) Plant. B) Yeast. C) Snake. D) Bread. Show Answer Correct Answer: B) Yeast. 14. In what way is photosynthesis and respiration related to each other? A) The reactants of photosynthesis are the reactants of respiration. B) The products of photosynthesis are the reactants of respiration. C) The products of photosynthesis are the products of respiration. D) None of the above. Show Answer Correct Answer: B) The products of photosynthesis are the reactants of respiration. 15. Red blood cells contain a pigment called A) Stomata. B) Respiration. C) Haemoglobin. D) Blood. Show Answer Correct Answer: C) Haemoglobin. 16. In which of the following habitats gills are used for respiration? A) Terrestrial respiration. B) Aquatic respiration. C) Pulmonary respiration. D) All types of respiration. Show Answer Correct Answer: B) Aquatic respiration. 17. Break down of food in the cell with the release of energy is called? A) Anaerobic respiration. B) Cellular respiration. C) Aerobic respiration. D) Exhalation. Show Answer Correct Answer: B) Cellular respiration. 18. Which ecological level includes all the deer living in an area? A) Population. B) Community. C) Organism. D) Ecosystem. Show Answer Correct Answer: A) Population. 19. Plants can respire in? A) Dark. B) Light. C) Both light and dark. D) Morning. Show Answer Correct Answer: C) Both light and dark. 20. When we inhale air, the ribs A) Stay's at rest position. B) None of these. C) Moves inwards. D) Moves outwards. Show Answer Correct Answer: D) Moves outwards. 21. Which is the main part in the process of respiration in plants? A) Chloroplasts. B) Soil. C) Leaves. D) Nucleus. Show Answer Correct Answer: C) Leaves. 22. How can individuals contribute to maintaining the balance of the oxygen cycle? A) Planting trees and supporting conservation efforts. B) Dumping waste into water bodies. C) Using more fossil fuels. D) Cutting down all the trees. Show Answer Correct Answer: A) Planting trees and supporting conservation efforts. 23. The food that provides us with quick energy is A) Protein. B) Glucose. C) Starch. D) Fat. Show Answer Correct Answer: B) Glucose. 24. The process of taking air into the body is ..... and releasing out of the body is called ..... A) Inhalation and exhalation. B) Exhalation and inhalation. C) None. D) Breathing. Show Answer Correct Answer: A) Inhalation and exhalation. 25. Anaerobic respiration does not require oxygen A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 26. This is referred to as the energy currency of the cell A) ATP. B) ADP. C) Nucleus. D) Mitochondria. Show Answer Correct Answer: A) ATP. 27. Where does cellular respiration occur in cells? A) Cell membrane. B) Nucleus. C) Mitochondria. D) Cytoplasm. Show Answer Correct Answer: C) Mitochondria. 28. In Anaerobic Respiration, the complete breakdown of glucose occurs by the supply of what? A) Nitrogen. B) Carbon Dioxide. C) Water. D) Oxygen. Show Answer Correct Answer: D) Oxygen. 29. The percentage of carbon dioxide is higher in exhaled air in comparison to inhaled air. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 30. Arteries carry the blood A) Away from the heart. B) Towards the heart. C) Nowhere. D) None of these. Show Answer Correct Answer: A) Away from the heart. 31. When you breathe, your lungs take in ..... and release ..... A) Oxygen/carbon dioxide. B) Waste/air. C) Carbon dioxide/waste. D) Air/oxygen. Show Answer Correct Answer: A) Oxygen/carbon dioxide. 32. Breathing rate of a normal human being is A) 15-18 breath/hour. B) 25 breath / hour. C) 25 breath/min. D) 15-18 breath/min. Show Answer Correct Answer: D) 15-18 breath/min. 33. Which of the following things need food? A) Bird. B) Book. C) Bottle. D) Pencil. Show Answer Correct Answer: A) Bird. 34. Anaerobic respiration ..... A) Doesn't require oxygen. B) Doesn't require CO2. C) Requires oxygen. D) Requires CO2. Show Answer Correct Answer: A) Doesn't require oxygen. 35. Cells do cell respiration in order to make A) Oxygen. B) Water. C) Glucose. D) Energy. Show Answer Correct Answer: D) Energy. 36. How does matter move through these systems (photosynthesis and respiration) A) Matter changes form as it moves. B) Matter is recycled as the atoms are rearranged in to different molecules. C) Matter starts as Sunlight and moves to ATP. D) The amount of matter decreases as it moves through the system. Show Answer Correct Answer: B) Matter is recycled as the atoms are rearranged in to different molecules. 37. Which of the following refers to the studying of how living organisms interact with their environments? A) Niche. B) Community. C) Symbiosis. D) Ecology. Show Answer Correct Answer: D) Ecology. 38. During exhalation the ribs move ..... A) Move upwards. B) Move downwards. C) Do not move at all. D) None of the above. Show Answer Correct Answer: B) Move downwards. 39. Each alveolus in the lungs is surrounded by a number of blood vessels A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 40. When we breathe in, our chest moves A) Upward and outward. B) Inward and downward. C) Upward and downward. D) Inward and outward. Show Answer Correct Answer: A) Upward and outward. 41. Due to accumulation of which acid there is a muscle cramp? A) Lactic acid. B) Hydrochloric acid. C) Sulphuric acid. D) Ammonium. Show Answer Correct Answer: A) Lactic acid. 42. Cockroaches breathe by using an organ called A) Tracheae. B) Nose. C) Spiracles. D) Nose. Show Answer Correct Answer: A) Tracheae. 43. Which among the following statements is false? A) The diaphragm moves up during Inhalation. B) The number of times a person breathes in a minute is called breathing rate. C) The process of breakdown of food in the cells resulting in the release of energy is called cellular respiration. D) Breathing is a Physical process. Show Answer Correct Answer: A) The diaphragm moves up during Inhalation. 44. ..... is the process that applies in all living cells that use glucose and oxygen to produce carbon dioxide, water and energy ..... is a process that occurs in all living cells that use glucose and oxygen to producer carbon dioxide, water and energy A) Respiration respiration. B) Respiranrespirant. C) Resapandifusion. D) RespirasiRespiration. Show Answer Correct Answer: D) RespirasiRespiration. 45. Organisms such as yeast that can survive in the absence of air are known as A) Anaerobes. B) Aerobes. C) None of these. D) None of the above. Show Answer Correct Answer: A) Anaerobes. 46. The gills help the fish to A) Release waste substance in water. B) Take in oxygen dissolved in water. C) Rabsorb nutrients present in wate. D) Take in oxygen from air. Show Answer Correct Answer: B) Take in oxygen dissolved in water. 47. Every time you exhale (breathe out), your body is getting rid of ..... A) Oxygen. B) Carbon dioxide. C) Protein. D) Glucose. Show Answer Correct Answer: B) Carbon dioxide. 48. Healthy condition of lungs can be determined by ..... A) Running. B) Walking. C) Chest expansion. D) All the above. Show Answer Correct Answer: C) Chest expansion. 49. The process of cellular respiration A) Is performed only by organisms that are incapable of photosynthesis. B) Is performed by autotrophs and heterotrophs. C) All the above. D) None of the above. Show Answer Correct Answer: B) Is performed by autotrophs and heterotrophs. 50. Whenever we feel drowsy or sleepy, we start yawning. Why? A) When we feel the sleepy rate of respiration slows down. Because of this lungs will not get enough oxygen and we yawn. B) Out of Syllabus. C) Yawning provides extra carbon dioxide to the body which helps us in staying awake. D) Yawning provides extra nitrogen to the body which helps us in staying awake. Show Answer Correct Answer: A) When we feel the sleepy rate of respiration slows down. Because of this lungs will not get enough oxygen and we yawn. 51. The percentage of oxygen in inhaled air is 21%. True or False? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 52. The first step of cellular respiration, called glycolysis, occurs in the ..... of all cells. A) Mitochondria. B) Cellular respiration. C) Cytoplasm. D) Glycolysis. Show Answer Correct Answer: C) Cytoplasm. 53. Which of the following are plant waste/s? A) Latex. B) Rubber. C) Oxygen. D) All of the above. Show Answer Correct Answer: D) All of the above. 54. Diaphragm is present in the ..... of the chest cavity A) Floor. B) Roof. C) Right. D) None of the above. Show Answer Correct Answer: A) Floor. 55. During heavy exercise the breathing rate declines. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 56. What is the role of decomposers in the oxygen cycle? A) Consume carbon dioxide and nutrients from the environment. B) Release oxygen and water vapor into the environment. C) Release carbon dioxide and nutrients back into the environment. D) Absorb oxygen from the environment. Show Answer Correct Answer: C) Release carbon dioxide and nutrients back into the environment. 57. Name the process by which animals take in oxygen and release carbon dioxide. A) Respiration. B) Digestion. C) Excretion. D) Photosynthesis. Show Answer Correct Answer: A) Respiration. 58. Name organs of the respiratory system A) Lungs. B) Nostrils. C) Alveoli. D) A and B. E) Name of these. Show Answer Correct Answer: D) A and B. 59. What are the end products of anaerobic respiration in animals? A) Proteins and fats. B) Lactic acid or ethanol and carbon dioxide. C) Water and carbon dioxide. D) Glucose and oxygen. Show Answer Correct Answer: B) Lactic acid or ethanol and carbon dioxide. 60. Insects have six ..... , which are found on the thorax. A) Feelers. B) Abdomen. C) Heads. D) Legs. Show Answer Correct Answer: D) Legs. ← PreviousNext →Related QuizzesScience QuizzesClass 7 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books