This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 12 Mineral Nutrition – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 12 Mineral Nutrition Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What product is formed when NH4+ react with $\alpha$ A) Glutamate. B) Pyruvate. C) Glutamine. D) Fumarate. Show Answer Correct Answer: A) Glutamate. 2. What is the concentration of carbon dioxide in the atmosphere? A) 10%. B) 1%. C) 0.1%. D) 0.01%. Show Answer Correct Answer: C) 0.1%. 3. What is the primary function of Zinc in plants? A) Cell division. B) Nutrient transport. C) Chlorophyll biosynthesis. D) Energy storage. Show Answer Correct Answer: C) Chlorophyll biosynthesis. 4. For its activity, carboxypeptidase requires: A) Zinc. B) Iron. C) Copper. D) Niacin. Show Answer Correct Answer: A) Zinc. 5. Grey spots of oat are due to deficiency of A) Mn. B) Cu. C) Fe. D) Zn. Show Answer Correct Answer: A) Mn. 6. What is the effect of temperature near 0$^\circ$C on enzymes affecting photosynthesis? A) Activates the enzymes. B) Deactivates the enzymes. C) Denatures the enzymes. D) Has no effect on enzymes. Show Answer Correct Answer: B) Deactivates the enzymes. 7. What is the process by which chlorophyll containing organisms synthesize complex organic molecules from simple inorganic substances in the presence of light? A) Respiration. B) Osmosis. C) Photosynthesis. D) Fermentation. Show Answer Correct Answer: C) Photosynthesis. 8. What is the main characteristic of mobile essential elements? A) Required in high concentrations. B) Only found in older leaves. C) Transported to young tissues. D) Cannot be transported. Show Answer Correct Answer: C) Transported to young tissues. 9. Is the process in plants which converts light energy to chemical energy? A) Respiration. B) Chemotropism. C) Phototropism. D) Photosynthesis. Show Answer Correct Answer: D) Photosynthesis. 10. What is the aim of Experiment II? A) To test a leaf for starch. B) To show that chlorophyll is necessary for photosynthesis. C) To show that oxygen is given off during photosynthesis. D) To show that carbon dioxide is necessary for photosynthesis. Show Answer Correct Answer: D) To show that carbon dioxide is necessary for photosynthesis. 11. Which part of the plant is the main photosynthetic organ? A) Leaf. B) Stem. C) Root. D) Flower. Show Answer Correct Answer: A) Leaf. 12. What is the role of auxins in plants? A) Enhance chlorophyll production. B) Stimulate photosynthesis. C) Promote flowering. D) Regulate root growth. Show Answer Correct Answer: D) Regulate root growth. 13. An element playing important role in nitrogen fixation is A) Manganese. B) Zinc. C) Copper. D) Molybdenum. Show Answer Correct Answer: D) Molybdenum. 14. Some elements like ..... delay flowering if their concentration in plants is low. A) Sulphur. B) Molybdenum. C) Nitrogen. D) All the above. Show Answer Correct Answer: D) All the above. 15. The function of leghaemoglobin in the root nodules of legumes is A) Inhibition of nitrogenase activity. B) Oxygen removal. C) Expression of nif gene. D) Nodule differentiation. Show Answer Correct Answer: B) Oxygen removal. 16. What is the primary source of inorganic substances for plants? A) Animal waste. B) Atmosphere, water, and soil. C) Fertilizers. D) Organic matter. Show Answer Correct Answer: B) Atmosphere, water, and soil. 17. The major role of minor elements inside living organisms is to act as A) Constituent of hormones. B) Cofactors of enzymes. C) Building blocks of important amino acids. D) Binder of cell structure. Show Answer Correct Answer: B) Cofactors of enzymes. 18. . The leaves turn dark green in colour is due to the deficiency of the element, ..... A) Phosphorus. B) Magnesium. C) Sulphur. D) Potassium. Show Answer Correct Answer: A) Phosphorus. 19. The cell of a root nodule in leguminous plant shows a rod shaped structure called ..... A) Bacteria. B) Bacteroid. C) Ureide. D) Infection thread. Show Answer Correct Answer: B) Bacteroid. 20. For its action, nitrogenase requires A) Mn2+. B) Super oxygen radicals. C) Light. D) High input of energy. Show Answer Correct Answer: D) High input of energy. 21. Which of the following nutrients is required in very low concentrations? A) Nitrogen. B) Zinc. C) Calcium. D) Magnesium. Show Answer Correct Answer: B) Zinc. 22. The products of reaction catalysed by nitrogenase in root nodules of leguminous plants is/are A) Ammonia alone. B) Nitrate alone. C) Ammonia and oxygen. D) Ammonia and hydrogen. Show Answer Correct Answer: D) Ammonia and hydrogen. 23. A plant requires magnesium for A) Holding cells together. B) Protein synthesis. C) Chlorophyll synthesis. D) Cell wall development. Show Answer Correct Answer: C) Chlorophyll synthesis. 24. Which is not a criterion for essentiality of a mineral? A) Deficiency causes hunger sign. B) Direct role in metabolism. C) Dispensible for growth. D) Requirement is specific. Show Answer Correct Answer: C) Dispensible for growth. 25. During the Citric Acid Cycle, Coenzyme A merges with Oxaloacetic Acid to create citrate. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 26. The enzyme, nitrogenase which is capable of nitrogen reduction is present exclusively in A) Protista. B) Prokaryotes. C) Eukaryotes. D) Fungi. Show Answer Correct Answer: B) Prokaryotes. 27. What is the aim of Experiment V:Showing that Light is Necessary for Photosynthesis? A) To show that light is necessary for photosynthesis. B) To show that water is necessary for photosynthesis. C) To show that heat is necessary for photosynthesis. D) To show that light is not necessary for photosynthesis. Show Answer Correct Answer: A) To show that light is necessary for photosynthesis. 28. The amount of macronutrients per kg of dry matter is- A) 10 mmole. B) Above 10 mmole. C) Less than 10 mmole. D) 0.1 mg. Show Answer Correct Answer: B) Above 10 mmole. 29. A(n) ..... is a layer of cells in the roots and stems that regulates movement of water and nutrients A) Epidermis. B) Cortex. C) Endodermis. D) None of the answers are correct. Show Answer Correct Answer: C) Endodermis. 30. What is a common symptom of mineral deficiency in plants? A) Enhanced root development. B) Increased fruit production. C) Leaf discoloration. D) Excessive growth. Show Answer Correct Answer: C) Leaf discoloration. 31. Which of the following statements will not hold the true if a plant is grown in only sand(S), only clay (C) and only humus (H)? A) Water availability to the roots will be more in (C) and (H) as compared to (S). B) Ability of roots to penetrate (S) and (H) will be low as compared to (C). C) Nutrient availability to roots will be less in (S) as compared to (C) and (H). D) Oxygen availability to roots will be low in (C) as compared to (S) and (H). Show Answer Correct Answer: B) Ability of roots to penetrate (S) and (H) will be low as compared to (C). 32. Macronutrient which is component of all organic compounds but is not obtained from soil is A) Phosphorus. B) Carbon. C) Magnesium. D) Nitrogen. Show Answer Correct Answer: B) Carbon. 33. What role do mycorrhizal associations play in plant nutrition? A) Promote flowering. B) Increase leaf size. C) Reduce water loss. D) Enhance nutrient uptake. Show Answer Correct Answer: D) Enhance nutrient uptake. 34. Which of the following is a symptom of nitrogen deficiency in plants? A) Mottling. B) Necrosis. C) Yellowing of leaves. D) Stunted growth. Show Answer Correct Answer: C) Yellowing of leaves. 35. Ammonia is first oxidised to nitrite by the bacteria ..... A) Nitrosomonas. B) Nitrococcus. C) Nitrobacter. D) Both A and B. Show Answer Correct Answer: D) Both A and B. 36. Farmers cover plant bases with straw in cold seasons to reduce the effect of ..... (1) ..... temperature on the absorption of water and minerals by the ..... (2) ..... A) High; (2) Leaves. B) High; (2) Roots. C) Low; (2) Leaves. D) Low; (2) Roots. Show Answer Correct Answer: D) Low; (2) Roots. 37. Thiobacillus is a group of bacteria helpful in carrying out A) Chemoautotrophic fixation. B) Denitrification. C) Nitrification. D) Nitrogen fixation. Show Answer Correct Answer: B) Denitrification. 38. In which of the following all three are macronutrients? A) Boron, zinc, manganese. B) Nitrogen, Calcium, Magnesium. C) Nitrogen, nickel, phosphorus. D) Molybdenum, magnesium, manganese. Show Answer Correct Answer: B) Nitrogen, Calcium, Magnesium. 39. What causes plants to "grow" towards light? A) Auxins in the stem (elongating on dark side). B) Nitrate. C) Auxins in the stem (elongating on the light side). D) Light. Show Answer Correct Answer: A) Auxins in the stem (elongating on dark side). 40. The elements that are highly mobile in plants are ..... and ..... A) N and Mg. B) S and Fe. C) Zn and Mn. D) Ca and B. Show Answer Correct Answer: A) N and Mg. 41. The xylem is composed of two types of cells: A) Epidermis and endodermis. B) Epidermis and vessel elements. C) Tracheids and vessel elements. D) Epidermis and root hairs. Show Answer Correct Answer: C) Tracheids and vessel elements. 42. Anoxygenic photosynthesis is characteristic of: A) Chlamydomonas. B) Spirogyra. C) Rhodospirillum. D) Ulva. Show Answer Correct Answer: C) Rhodospirillum. 43. Plants response to water ..... A) Gravitropism. B) Chemotropism. C) Phototropism. D) Hydroptropism. Show Answer Correct Answer: D) Hydroptropism. 44. Plants absorb nitrogen in the form of ..... A) Nitric oxide. B) Nitrates. C) Nitrites. D) Nitrogen. Show Answer Correct Answer: B) Nitrates. 45. In plants, water and minerals are transported through which vascular system? A) Phloem. B) Both. C) Xylem. D) Root hairs. Show Answer Correct Answer: C) Xylem. 46. What is the role of Magnesium in plants? A) Flowering. B) Cell division. C) Root development. D) Photosynthesis. Show Answer Correct Answer: D) Photosynthesis. 47. Choose wrong one. A) N$_{2}$-fixation needs anaerobic condition. B) ATP, that is used in nitrogen fixation comes from respiration of host cells. C) Amides serves as protein precursor, key compound for nitrogen transport and storage. D) Amides have low N-to C ratio. Show Answer Correct Answer: D) Amides have low N-to C ratio. 48. What is the primary role of Copper in plants? A) Photosynthesis. B) Enzyme activation. C) Cell elongation. D) Nutrient transport. Show Answer Correct Answer: B) Enzyme activation. 49. Water potential is a measure of how freely water molecules can move. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 50. Which of the following is a factor affecting mineral uptake? A) Flowering time. B) Plant height. C) Leaf area. D) Soil temperature. Show Answer Correct Answer: D) Soil temperature. 51. Conversion of nitrate to ammonia is a/an: A) Oxidative process. B) Amination process. C) Reductive process. D) Deamination process. Show Answer Correct Answer: C) Reductive process. 52. Which is essential for the growth of root tip? A) Zn. B) Mn. C) Ca. D) Fe. Show Answer Correct Answer: C) Ca. 53. What is hydroponics? A) Water-based, soilless growing method. B) Growing in soil. C) Growing plants that are suspended in the air. D) The use of fish to act as a fertilizer for plants. Show Answer Correct Answer: A) Water-based, soilless growing method. 54. Which of the following is not a criterion for an essential nutrient? A) It is required for growth and reproduction. B) Form large molecules in plants. C) No other element can replace it. D) It is required for a specific structure or metabolic function. Show Answer Correct Answer: B) Form large molecules in plants. 55. Which one of the following helps in absorption of phosphorous from soil by plants? A) Glomus. B) Anabaena. C) Frankia. D) Rhizobium. Show Answer Correct Answer: A) Glomus. 56. Which elements do plants need for completion of their life cycle? A) Fertilizers. B) Manure. C) Macroelements. D) Essential Elements. Show Answer Correct Answer: D) Essential Elements. 57. Transpiration mainly occurs through stomata because A) It has a high rate and is unregulated. B) It has a high rate and is regulated by stomatal opening and closing. C) It has a low rate and is unregulated. D) It has a low rate and is regulated. Show Answer Correct Answer: B) It has a high rate and is regulated by stomatal opening and closing. 58. What is the primary function of Calcium in plants? A) Nutrient transport. B) Chlorophyll formation. C) Energy storage. D) Cell wall synthesis. Show Answer Correct Answer: D) Cell wall synthesis. 59. What is the aim of Experiment III:Showing that Oxygen is given off during Photosynthesis? A) To show that carbon dioxide is given off during photosynthesis. B) To show that glucose is given off during photosynthesis. C) To show that oxygen is given off during photosynthesis. D) To show that water is given off during photosynthesis. Show Answer Correct Answer: C) To show that oxygen is given off during photosynthesis. 60. Roots absorb water most effectively when A) Soil is dry and saline. B) Soil is moderately moist and aerated. C) Soil is waterlogged. D) Soil is cold and compact. Show Answer Correct Answer: B) Soil is moderately moist and aerated. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Biology Chapter 12 Mineral Nutrition Quiz 1Class 11 Biology Chapter 12 Mineral Nutrition Quiz 2Class 11 Biology Chapter 12 Mineral Nutrition Quiz 4Class 11 Biology Chapter 1 The Living World QuizClass 11 Biology Chapter 10 Cell Cycle And Cell Division QuizClass 11 Biology Chapter 11 Transport In Plants QuizClass 11 Biology Chapter 13 Photosynthesis In Higher Plants QuizClass 11 Biology Chapter 14 Respiration In Plants Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books