This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 13 Photosynthesis In Higher Plants – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 13 Photosynthesis In Higher Plants Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the chemical equation for photosynthesis? Choose the BEST answer A) C6H12O6 + O2 $\rightarrow$ CO2 + H2O. B) 6 CO2 + 6 H2O $\rightarrow$ C6H12O6 + 6 O2. C) C6H12O6 + 6 O2 $\rightarrow$ 6 CO2 + 6 H2OTagsPhotosynthesis. D) CO2 + H2O $\rightarrow$ C6H12O6 + O2. Show Answer Correct Answer: B) 6 CO2 + 6 H2O $\rightarrow$ C6H12O6 + 6 O2. 2. How do plants adapt to optimize photosynthesis in different environments? A) Plants rely solely on sunlight for photosynthesis. B) Plants optimize photosynthesis by modifying leaf structure, adjusting stomatal openings, and employing C3, C4, or CAM pathways. C) Plants do not change their leaf structure in different environments. D) Plants only use one type of photosynthetic pathway regardless of conditions. Show Answer Correct Answer: B) Plants optimize photosynthesis by modifying leaf structure, adjusting stomatal openings, and employing C3, C4, or CAM pathways. 3. When testing a leaf for starch why is it necessary to boil it in ethanol first? A) To break open the plant cells. B) To remove the green chlorophyll from the leaf. C) To release the starch form the cells. D) To kill the plant cells. Show Answer Correct Answer: B) To remove the green chlorophyll from the leaf. 4. What is the chemical formula for oxygen? A) C$_{6}$O$_{2}$. B) O$_{2}$. C) O$_{3}$. D) H$_{12}$O$_{2}$$_{}$. Show Answer Correct Answer: B) O$_{2}$. 5. What do photosynthesis and cellular respiration have in common? A) They both require Sun light. B) Both are carried on by heterotrophs. C) They both create energy for an organism to use. D) They both transform energy for an organism to use. Show Answer Correct Answer: D) They both transform energy for an organism to use. 6. The ..... the temperature, the more photosynthesis can occur. A) Higher. B) Lower. C) All the above. D) None of the above. Show Answer Correct Answer: A) Higher. 7. Bean shaped cells near the opening of stomata A) Guard cells. B) Stoma open. C) Stoma close. D) None of the above. Show Answer Correct Answer: A) Guard cells. 8. The vascular system is composed of two types of tissues called A) Protective and supportive. B) Xylem and phloem. C) Meristematic and permanent. D) Parenchyma and chlorenchyma. Show Answer Correct Answer: B) Xylem and phloem. 9. Is photosynthesis an endothermic or exothermic reaction? A) Exothermic. B) Endothermic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Endothermic. 10. Photosyntheis is the process in which humans, and animals use energy from sunlight to produce sugar. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 11. How are photosynthesis and cellular respiration related? A) They have opposite equations. B) They have the same equation. C) They both produce carbon dioxide. D) They both produce oxygen. Show Answer Correct Answer: A) They have opposite equations. 12. What are located in the chloroplast? A) Pigments. B) Mitochondria. C) Sucrose. D) None of these answera. Show Answer Correct Answer: A) Pigments. 13. In C3 photosynthesis, the reactions that require ATP take place in A) The light reactions alone. B) The calvin cycle only. C) Both the light reactions and the calvin cycle. D) The citric acid cycle. Show Answer Correct Answer: B) The calvin cycle only. 14. The source of O2 liberated in photosynthesis in green plants is A) Carbon dioxide. B) Photosynthetic enzyme. C) Carbohydrate present in leaf. D) Water. Show Answer Correct Answer: D) Water. 15. In the light independent reaction ATP is used to A) Combine H$_{2}$O with the carbon atom carried by NADPH to form glucose. B) Combine CO$_{2}$ with the hydrogen atom carried by NADPH to form glucose. C) Combine CO$_{2}$ with the hydrogen atom carried by ADP+P to form glucose. D) None of the above. Show Answer Correct Answer: B) Combine CO$_{2}$ with the hydrogen atom carried by NADPH to form glucose. 16. Chemosynthetic bacteria obtain energy from A) Infrared rays. B) Sun. C) Inorganic chemicals. D) Organic substances. Show Answer Correct Answer: C) Inorganic chemicals. 17. The common feature between cyclic and non cyclic photo phosphorylation is:- A) Release of O$_{2}$. B) Source of electrons. C) Photosystem-II. D) Proton gradient. Show Answer Correct Answer: D) Proton gradient. 18. What is a prop root? A) A root that stores food. B) A root that grows above the ground and helps hold the plant upright. C) A root that can't absorb water. D) A root that grows from the tips of the leaves. Show Answer Correct Answer: B) A root that grows above the ground and helps hold the plant upright. 19. What would be the expected effect on plants if the atmospheric CO$_{2}$ concentration was doubled? A) All plants will experience increased rates of photosynthesis. B) C$_{3}$ plants will have faster growth; C$_{4}$ plants will be minimally affected. C) C$_{4}$ plants will have faster growth; C$_{3}$ plants will be minimally affected. D) C$_{3}$ plants will have faster growth; C$_{4}$ plants will have slower growth. Show Answer Correct Answer: B) C$_{3}$ plants will have faster growth; C$_{4}$ plants will be minimally affected. 20. Which of these will not affect photosynthesis? A) Glucose Availability. B) Carbon Dioxide. C) Light. D) Temperature. Show Answer Correct Answer: A) Glucose Availability. 21. The energy to hydrolyse water comes from- A) Reduced Chl. B) Oxidised chlorophyll. C) ATP. D) The proton gradient. Show Answer Correct Answer: B) Oxidised chlorophyll. 22. Action spectrum of photosynthetic pigments was studied by Englemann on ..... in the presence of ..... bacteria. A) Spirogyra, Anaerobic. B) Scenedesmus, Anaerobic. C) Cladophora, aerobic. D) Chlorella, Aerobic. Show Answer Correct Answer: C) Cladophora, aerobic. 23. The more light, the ..... the rate of photosynthesis A) Higher. B) Lower. C) Same. D) None of the above. Show Answer Correct Answer: A) Higher. 24. Pigments are organised into two discrete photochemical light harvesting complexes within the PS I and PS II. These are named in A) More than one option is correct. B) The sequence of arrangement of chlorophylls. C) Which they function in light reaction. D) The sequence of discovery. Show Answer Correct Answer: D) The sequence of discovery. 25. Plants need ..... as a reactant for photosynthesis. A) Carbon dioxide. B) Soil. C) Oxygen. D) Sugar. Show Answer Correct Answer: A) Carbon dioxide. 26. How many additional ATP are used during synthesis of two molecules of hexose sugar in maize than tomato? A) 12. B) 36. C) 24. D) 8. Show Answer Correct Answer: C) 24. 27. In case of wheat and rice, C4 cycle takes place in A) Epidermal cells. B) Mesophyll cells. C) Bundle sheath cells. D) Both b and c. Show Answer Correct Answer: B) Mesophyll cells. 28. What happens to the solar energy absorbed by plants during photosynthesis? A) It is recycled by plants and returned to the atmosphere. B) It is converted into oxygen and glucose. C) It is stored as heat within the plant for cellular functions. D) It is transformed into chemical energy. Show Answer Correct Answer: D) It is transformed into chemical energy. 29. Photophosphorylation in a chloroplast is most similar to which of the following mitochondrial reactions? A) Oxidative phosphorylation. B) Substrate level phosphorylation. C) Hydrolysis. D) None. Show Answer Correct Answer: A) Oxidative phosphorylation. 30. Nitrogen makes up 78% of Earth's atmosphere. Which statement BEST describes the importance of the nitrogen cycle? A) People need nitrogen to breathe. B) Plants need nitrogen for photosynthesis. C) Nitrogen needs to combine with oxygen to make water. D) Nitrogen gas cannot be used directly by most organisms. Show Answer Correct Answer: D) Nitrogen gas cannot be used directly by most organisms. 31. A plant cell uses the molecules in the list to synthesize a protein. What role do the ATP molecules play in the protein synthesis process? A) They provide energy. B) They convert energy into hereditary information. C) They increase activation energy. D) They absorb excess energy to prevent overheating. Show Answer Correct Answer: A) They provide energy. 32. What are the two products that are formed in photosynthesis? A) Oxygen and carbon dioxide. B) Water and oxygen. C) Oxygen and glucose. D) Water and glucose. Show Answer Correct Answer: C) Oxygen and glucose. 33. How many products are produced during photosynthesis? A) 2. B) 4. C) 1. D) 3. Show Answer Correct Answer: A) 2. 34. What pigment in plants captures sunlight for photosynthesis? A) Carotene. B) Anthocyanin. C) Xanthophyll. D) Chlorophyll. Show Answer Correct Answer: D) Chlorophyll. 35. Photorespiration involves A) The production of massive amounts of ATP in the thylakoid. B) The breakdown of sugar when CO2 levels are low. C) Water being pulled out of the plant. D) The production of oxygen gas during the break down of sugar. Show Answer Correct Answer: B) The breakdown of sugar when CO2 levels are low. 36. The third carbon of chlorophyll a & b have A) Methyl group, aldehyde group respectively. B) Aldehyde group, methyl group respectively. C) Both have same group. D) None of the above. Show Answer Correct Answer: A) Methyl group, aldehyde group respectively. 37. What is the relationship between wavelength of light and the quantity of energy per photon? A) They have a direct, linear relationship. B) They are inversely related. C) They are logarithmically related. D) They are only related in certain parts of the spectrum. Show Answer Correct Answer: B) They are inversely related. 38. Photosythesis happens in a cell's A) Mitochondria. B) Chloroplast. C) Nucleus. D) Cell Wall. Show Answer Correct Answer: B) Chloroplast. 39. Which is correct sequence of Electron movement in cyclic photophosphorylation? A) PSI-Fes-Plastocyanin-plastoquinone-cytb6f-PSI. B) PSI-Fes-plastoquinone-cytb6f-plastocyanin-PSI. C) PSI-Fes-plastoquinone-cytb6f-plastocyanin. D) PSI-phaeophytin-plastoquinone-plastocyanin-cytb6f. Show Answer Correct Answer: B) PSI-Fes-plastoquinone-cytb6f-plastocyanin-PSI. 40. During photosynthesis, electrons are continuously lost from the reaction centre of PSII. What source is used to replace these electrons? A) O$_{2}$. B) H$_{2}$O. C) Sunlight. D) O$_{3}$. Show Answer Correct Answer: B) H$_{2}$O. 41. What is a limiting factor? A) The factor which increases the rate of a reaction. B) The factor that limits the reaction rate. C) The factor that limits the rate at which an enzyme is destroyed. D) None of the above. Show Answer Correct Answer: B) The factor that limits the reaction rate. 42. In ..... , enzymatic reactions incorporate CO2 into the plant leading to the synthesis of sugar, which in turn forms starch. A) Intermembrane space of mitochondria. B) Grana of chloroplast. C) Matrix of mitochondria. D) Stroma of chloroplast. Show Answer Correct Answer: D) Stroma of chloroplast. 43. Where does photosynthesis take place? A) Brain. B) Chloroplast. C) Nucleus. D) Mitochondria. Show Answer Correct Answer: B) Chloroplast. 44. What color of light increases the amount of oxygen produced by photosynthesis? A) Blue/ Red. B) Green. C) Orange. D) Yellow. Show Answer Correct Answer: A) Blue/ Red. 45. What is the effect of increased light intensity on the rate of photosynthesis? A) It decreases the rate of photosynthesis. B) It has no effect on the rate of photosynthesis. C) It stops photosynthesis completely. D) It increases the rate of photosynthesis up to a certain point. Show Answer Correct Answer: D) It increases the rate of photosynthesis up to a certain point. 46. Which of the following does NOT occur during the Calvin Cycle A) Regeneration of the carbon dioxide acceptor. B) Carbon fixation. C) Oxidation of NADPH. D) Release of oxygen. Show Answer Correct Answer: D) Release of oxygen. 47. What is the primary function of the Calvin cycle? A) Produce simple sugars from carbon dioxide. B) Produce oxygen by oxidizing water. C) RegenerateATP for use in the light reactions of photosynthesis. D) Produce carbon dioxide for use in the lightreactions of photosynthesis. Show Answer Correct Answer: A) Produce simple sugars from carbon dioxide. 48. What is the formula for photosynthesis? A) CO2 + H2O + sunlight = C6H12O6 + 6O2. B) Sunlight + CO2 = H2O + C6H12O6 + O2. C) Oxygen + carbon dioxide + water = sunlight + sugar. D) Glucose + oxygen = carbon dioxide + water + sunlight. Show Answer Correct Answer: A) CO2 + H2O + sunlight = C6H12O6 + 6O2. 49. What are the products (after reactions) of the photosynthesis process? A) Carbon dioxide, oxygen, water. B) Glucose (sugar), oxygen. C) Carbon dioxide, sunlight energy, water. D) Carbon dioxide, glucose (sugar), water. Show Answer Correct Answer: B) Glucose (sugar), oxygen. 50. Where is glucose made in plants? A) Outside the chloroplast. B) Stroma. C) Thylakoid membrane. D) Thylakoid. Show Answer Correct Answer: B) Stroma. 51. What are the 2 reactants of photosynthesis? A) Water, glucose. B) Oxygen, glucose. C) Carbon dioxide, water. D) Oxygen, water. Show Answer Correct Answer: C) Carbon dioxide, water. 52. What is the primary gas released during photosynthesis? A) Oxygen. B) Nitrogen. C) Carbon dioxide. D) Hydrogen. Show Answer Correct Answer: A) Oxygen. 53. What causes plants to appear green? A) Golgi Bodies. B) Carotenoids. C) Cell Membrane. D) Chlorophyll. Show Answer Correct Answer: D) Chlorophyll. 54. If carbon dioxide is completely removed from a plant's environment, what would you expect to happen to the plant's production of high-energy sugars (rate of photosynthesis)? A) The rate of sugar production will decrease . B) Fewer sugars will be produced at first, but then the plant will recover. C) Sugar production will likely increase. D) Sugars will not be produced. Show Answer Correct Answer: D) Sugars will not be produced. 55. What is the main pigment in plants? A) Chloroplast. B) Carton. C) Chlorophyll. D) Carotonoids. Show Answer Correct Answer: C) Chlorophyll. 56. An external source of electrons is not required in A) Cyclic photophosphorylation. B) Non-cyclic photophosphorylation. C) Z-scheme of flow of electrons. D) All of these. Show Answer Correct Answer: A) Cyclic photophosphorylation. 57. What kind of energy is necessary to initiate the process of photosynthesis? A) Heat. B) Electrical. C) Wind. D) Radiant. Show Answer Correct Answer: D) Radiant. 58. CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they A) Fix CO$_{2}$ into organic acids during the night. B) Fix CO$_{2}$ into sugars in the bundle-sheath cells. C) Fix CO$_{2}$ into pyruvate in the mesophyll cells. D) Use photosystem I and photosystem II at night. Show Answer Correct Answer: A) Fix CO$_{2}$ into organic acids during the night. 59. Mesophyll cells are abundantly present on ..... surface of the leaf A) Upper. B) Lower. C) All the above. D) None of the above. Show Answer Correct Answer: A) Upper. 60. Which chlorophyll pigment is more soluble in organic solvents such as petroleum, ether & which is more in 92% methanol? A) Chlorophyll b, chlorophyll a respectively. B) Chlorophyll a, chlorophyll b respectively. C) Both chlorophylls have equal solubility in them. D) None of the above. Show Answer Correct Answer: B) Chlorophyll a, chlorophyll b respectively. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Biology Chapter 13 Photosynthesis In Higher Plants Quiz 1Class 11 Biology Chapter 13 Photosynthesis In Higher Plants Quiz 2Class 11 Biology Chapter 13 Photosynthesis In Higher Plants Quiz 4Class 11 Biology Chapter 13 Photosynthesis In Higher Plants Quiz 5Class 11 Biology Chapter 13 Photosynthesis In Higher Plants Quiz 6Class 11 Biology Chapter 13 Photosynthesis In Higher Plants Quiz 7Class 11 Biology Chapter 13 Photosynthesis In Higher Plants Quiz 8Class 11 Biology Chapter 13 Photosynthesis In Higher Plants Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books