This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 14 Respiration In Plants – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 14 Respiration In Plants Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Glycolysis alone can account for the complete oxidation of glucose in plant cells. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 2. Why is respiration important for plants? A) Respiration provides energy for growth and other life processes. B) Respiration helps plants absorb sunlight for photosynthesis. C) Respiration allows plants to take in minerals from the soil. D) Respiration helps plants lose water through transpiration. Show Answer Correct Answer: A) Respiration provides energy for growth and other life processes. 3. In plants, energy is obtained from the sun in the form of solar energy and stored in the form of complex organic matter. Where is it used? A) Plants only know. B) Used for seeing the stomata easily with a microscope. C) Used for carrying unuseful tissues out of the plant. D) Used for performing various essential functions of life by the plant. Show Answer Correct Answer: D) Used for performing various essential functions of life by the plant. 4. Stomata are present in the A) Upperside of the leaves. B) Underside of the leaves. C) On the stem. D) All of the above. Show Answer Correct Answer: B) Underside of the leaves. 5. Which inspiration steps are in the correct order A) Diaphragm relaxes, air pressure drops, air forced in. B) Diaphragm contracts, air pressure lowers, air forced in. C) Air pressure raises, air forced out, diaphragm contracts. D) Air forced in, diaphragm relaxes, air pressure raises. Show Answer Correct Answer: B) Diaphragm contracts, air pressure lowers, air forced in. 6. What is the main purpose of the respiratory electron transport chain? A) Convert energy from oxygen into energy in ATP. B) Convert energy from NADH and FADH2 into energy in ATP. C) Convert energy from NAD+ and FAD+ into energy in ATP. D) Convert energy from acetyl-CoA into energy in ATP. Show Answer Correct Answer: B) Convert energy from NADH and FADH2 into energy in ATP. 7. Which of the following type of simple epithelium tissue present in the lining of the stomach and intestine? A) Ciliated epithelium. B) Cuboidal epithelium. C) Squamous epithelium. D) Columnar epithelium. Show Answer Correct Answer: D) Columnar epithelium. 8. For gaseous exchange plants have- A) Stomata. B) Lenticels. C) Porin. D) A and b. Show Answer Correct Answer: D) A and b. 9. The end product/products of oxidative phosphorylation is/are A) ATP + H2O. B) ADP. C) NADH. D) Oxygen. Show Answer Correct Answer: A) ATP + H2O. 10. Aerial roots are seen in ..... A) Tropical forest. B) Rainforest. C) Black mangroves. D) All of the aboveAll of the above. Show Answer Correct Answer: C) Black mangroves. 11. The "regenerator" of the Krebs Cycle is: A) Citrate. B) $\alpha$-Ketoglutarate. C) Acetyl-CoA. D) Oxaloacetate. Show Answer Correct Answer: D) Oxaloacetate. 12. Photosynthesis is the same as Respiration? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 13. What is the byproduct of anaerobic respiration in muscles? A) Glucose. B) Carbon dioxide. C) Lactic acid. D) Water. Show Answer Correct Answer: C) Lactic acid. 14. Oxidative phosphorylation is:- A) Addition of phosphate group to ATP. B) Formation of ATP by transfer of phosphate group from a substrate to ADP. C) Oxidation of phosphate group in ATP. D) Formation of ATP by energy released from electrons removed during substrate oxidation. Show Answer Correct Answer: D) Formation of ATP by energy released from electrons removed during substrate oxidation. 15. Respiration in plants is represented as A) Sugar + oxygen $\rightarrow$ energy + carbon dioxide + water. B) Energy $\rightarrow$ oxygen + water + sugar. C) Carbon dioxide + sugar $\rightarrow$ oxygen + water + energy. D) None of the above. Show Answer Correct Answer: A) Sugar + oxygen $\rightarrow$ energy + carbon dioxide + water. 16. What is the product of aerobic respiration? A) Carbon dioxide, ethyl alcohol, water. B) Carbon dioxide, water, energy. C) Ethyl alcohol, carbon dioxide, energy. D) Energy, water, ethyl alcohol. Show Answer Correct Answer: B) Carbon dioxide, water, energy. 17. Which of these is a correct word equation for anaerobic respiration in plants? A) Glucose $\rightarrow$ ethanol + carbon dioxide + energy. B) Carbon dioxide + water $\rightarrow$ glucose + oxygen. C) Ethanol + oxygen $\rightarrow$ carbon dioxide + water. D) Glucose + oxygen $\rightarrow$ carbon dioxide + water. Show Answer Correct Answer: A) Glucose $\rightarrow$ ethanol + carbon dioxide + energy. 18. In which of the following reactions of glycolysis, a molecule of water is removed from the substrate? A) Glucose $\rightarrow$ Glucose-6-phosphate. B) Fructose-6-phosphate $\rightarrow$ Fructose-1, 6 bisphosphate. C) Phosphoenolpyruvate $\rightarrow$ Pyruvate. D) 2-phosphoglycerate $\rightarrow$ Phosphoenolpyruvate. Show Answer Correct Answer: D) 2-phosphoglycerate $\rightarrow$ Phosphoenolpyruvate. 19. During glycolysis, ATP molecules are consumed in which steps? A) Step 1 and 3. B) Step 2 and 4. C) Step 6 and 7. D) Step 8 and 10. Show Answer Correct Answer: A) Step 1 and 3. 20. Plants produce glucose through the process of ..... A) Photosynthesis. B) Cellular respiration. C) All the above. D) None of the above. Show Answer Correct Answer: A) Photosynthesis. 21. When a leaf is magnified, we see a structure which can open and close for gaseous exchange. A) Lenticel. B) Stoma. C) Chloroplast. D) Guard cell. Show Answer Correct Answer: B) Stoma. 22. Which of the following is not a requirement for the Krebs Cycle? A) Pyruvate. B) Water. C) NAD+. D) FAD+. Show Answer Correct Answer: A) Pyruvate. 23. Where does glycolysis happen? A) Cytoplasm. B) Mitochondria. C) Chloroplast. D) Cell Membrane. Show Answer Correct Answer: A) Cytoplasm. 24. How do plants obtain the oxygen required for respiration? A) Through roots. B) Through stomata. C) From the soil. D) From water. Show Answer Correct Answer: B) Through stomata. 25. ..... are bean shaped. A) Urinary bladder. B) Kidneys. C) Urethra. D) Ureters. Show Answer Correct Answer: B) Kidneys. 26. In plants, which organ performs respiration? A) All organs. B) Roots. C) Stems. D) Leaves. Show Answer Correct Answer: A) All organs. 27. If a plant is under starvation condition, the value of RQ will be A) More than 1. B) Less than 1. C) 1. D) None of the above. Show Answer Correct Answer: B) Less than 1. 28. Two different species of bacteria are examined. Scientists find that species X always produces CO2 and H2O during cellular respiration. Species Y always produces ethyl alcohol and CO2. Which conclusion can be made from these observations? A) Only species Y is aerobic. B) Only species Y is anaerobic. C) Both species X and Y are aerobic. D) Both species X and Y are anaerobic. Show Answer Correct Answer: B) Only species Y is anaerobic. 29. What does the plant release during the photosynthesis? A) Oxygen. B) Carbon. C) Carbon dioxide. D) None of the above. Show Answer Correct Answer: A) Oxygen. 30. The complete breakdown of glucose happens in the ..... A) Energy currency of the cell. B) Lenticels. C) Cytoplasm. D) Mitochondria. Show Answer Correct Answer: D) Mitochondria. 31. Which enzyme catalyses the reaction below? Pyruvic acid $\rightarrow$ Carbon dioxide + Ethanol(a) Pyruvic acid decarboxylase(b) Alcohol dehydrogenase(c) None of these(d) Both of these A) Both of these. B) Pyruvic acid decarboxylase. C) Alcohol dehydrogenase. D) None of these. Show Answer Correct Answer: A) Both of these. 32. The accumulation of protons during mitochondrial ETS occurs in A) Stroma. B) Matrix. C) Intermembrane space. D) Cristae. Show Answer Correct Answer: C) Intermembrane space. 33. Which is not a product of cellular respiration? A) Carbon dioxide. B) Oxygen. C) Water. D) ATP. Show Answer Correct Answer: B) Oxygen. 34. Which of the following is not an electron carrier in the Electron transport system in Respiration? A) Cyt a. B) Cyt b. C) O2. D) UQ. Show Answer Correct Answer: C) O2. 35. How many ATP molecules are formed directly (substrate-level) during complete aerobic respiration of one glucose molecule? A) 6. B) 8. C) 4. D) 2. Show Answer Correct Answer: C) 4. 36. How is respiration in plants different from photosynthesis? A) Respiration only happens at night, while photosynthesis happens during the day and night. B) Respiration occurs all the time, while photosynthesis only happens in the presence of light. C) Respiration and photosynthesis both require sunlight to occur. D) Respiration and photosynthesis both release oxygen as a product. Show Answer Correct Answer: B) Respiration occurs all the time, while photosynthesis only happens in the presence of light. 37. A splinter goes out in the experiment due to the absence of which gas? A) Oxygen. B) Hydrogen. C) Nitrogen. D) Carbon dioxide. Show Answer Correct Answer: A) Oxygen. 38. Which of the following is correct for Krebs cycle? A) Succinic dehydrogenase enzyme is found in matrix of mitochondria. B) In one turn of it, 10 ATP equivalents are formed. C) It is also known as EMP pathway. D) It occurs in mitochondrial matrix. Show Answer Correct Answer: D) It occurs in mitochondrial matrix. 39. What acidic gas do plants produce in aerobic respiration? A) Oxygen. B) Nitrogen. C) Carbon Dioxide. D) Water. Show Answer Correct Answer: C) Carbon Dioxide. 40. How many molecules of pyruvic acid are formed from one molecule of glucose during glycolysis? A) One. B) Three. C) Four. D) Two. Show Answer Correct Answer: D) Two. 41. Excess water isn't removed in the form of urine and sweat. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 42. Respiration and photosynthesis are a reverse of each other, but also complementary to each other. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 43. The process of evaporation of water from aerial parts of the plants like leaves, stems, and flowers is known as 'transpiration'. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 44. Q4). ANAEROBIC RESPIRATION IS ALSO KNOWN AS ..... PHASE. A) BIOTIC. B) ABIOTIC. C) OXYBIOTIC. D) ANOXYBIOTIC. Show Answer Correct Answer: D) ANOXYBIOTIC. 45. Glycolysis is the first step of respiration. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 46. The marker enzyme for the mitochondrial cell organelle is responsible for A) Oxidizing FADH$_{2}$. B) Conversion of succinate to fumarate. C) Condensation of acetyl CoA and OAA. D) Both A and B. Show Answer Correct Answer: D) Both A and B. 47. Sphincter muscles are ..... muscles. A) Oval. B) Square. C) Circular. D) Irregular. Show Answer Correct Answer: C) Circular. 48. Renal tubules are also called ..... A) Ureter. B) Cortex. C) Nephron. D) Sphincter muscles. Show Answer Correct Answer: C) Nephron. 49. ..... is a physical process. A) Inhaling. B) Breathing. C) Exhaling. D) Respiration. Show Answer Correct Answer: B) Breathing. 50. Phosphorylation of glucose during glycolysis is catalyzed by: A) Phosphoglucomutase. B) Phosphoglucoisomerase. C) Phosphorylase. D) Hexokinase. Show Answer Correct Answer: D) Hexokinase. 51. Glycolysis occurs in the cytoplasm and converts glucose to pyruvic acid, and the Krebs cycle occurs in the mitochondria to complete the breakdown. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 52. Anabolism is a building up or formation process A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 53. ..... are small openings present in leaves. A) Neuron. B) Chloroplast. C) Stomate. D) Stomata. Show Answer Correct Answer: D) Stomata. 54. Which organelle does aerobic cellular respiration happen in? A) Chloroplast. B) Nucleus. C) Chlorophyll. D) Mitochondria. Show Answer Correct Answer: D) Mitochondria. 55. What is the job of chloroplasts? A) To absorb sunlight for photosynthesis. B) To absorb water from the soil. C) To protect the plant from predators. D) To break down glucose for energy. Show Answer Correct Answer: A) To absorb sunlight for photosynthesis. 56. In which step, FADH2 produced? A) Step 8:Oxidation. B) Step 1:Condensation. C) Step 6:Oxidation. D) Step 2:Isomerization. Show Answer Correct Answer: C) Step 6:Oxidation. 57. The enzyme that produces G3P & DHAP is: A) Hexokinase. B) Enolase. C) PhosphoFructoKinase. D) Aldolase. Show Answer Correct Answer: D) Aldolase. 58. The bio-macromolecule behaving as the terminal electron acceptor during mitochondrial ETS is A) Oxygen. B) Nitrogen. C) Hydrogen. D) Carbon. Show Answer Correct Answer: A) Oxygen. 59. How many oxidation step take place during glycolysis, link reaction and Kreb's cycle. A) 1, 1 and 1. B) 1, 1 and 4. C) 1, 1 and 3. D) 1, 1 and 8. Show Answer Correct Answer: B) 1, 1 and 4. 60. Which structure regulates gas exchange during the processes of photosynthesis and respiration? A) STOMA/STOMATA. B) CHLOROPLAST. C) SEPAL. D) CUTICLE. Show Answer Correct Answer: A) STOMA/STOMATA. 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