NCERT Class 11 MCQ Quiz Hub

MCQ Questions for Class 11 Biology sets 3

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1. Dry seeds kept in water swell due to




2. Choose the correct statement/statements. Pumps in active transport are A. Lipids that bind molecules to pass them through the membrane. B. Transport molecules uphill. C. These are specific transporters. D. These are sensitive to inhibitors.




3. Which of the following is the unit of ψ?




4. Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will be:




5. Which of the following is decreased during increase in humidity in the atmosphere?




6. Ψs is always




7. Two types of molecules cross the membrane in the same direction, it is called as




8. Diffusion rate is affected by




9. Cells shrink in _________ solution.




10. Which of the following is true about diffusion?




11. If pressure greater than atmospheric pressure is applied to pure water, the water potential




12. Choose the correct sequence of water movement in the plants.




13. Wilting of a plant results from excessive




14. Cohesion theory of water movement in plants was put forth by




15. When a plant is girdled (ringed)




16. Assertion (A): K+ ion accumulation found in Nitella depends on its respiratory activity. Reason (R): Absorption of all ions in plants completely depends on the usage of metabolic energy. The correct answer is




17. In plants, a common symptom caused by deficiency of P, K, Ca and Mg is the




18. Function of zinc is




19. Which of the following is a group of micronutrients?




20. The process of conversion of NO2– to N2 is called




21. The formation of first stable product of nitrogen fixation is catalysed by enzyme




22. Manganese toxicity leads to deficiency of




23. Chlorosis will occur if a plant is grown in




24. Choose the correct function of magnesium.




25. Mineral salts which are absorbed by the roots from soil are in the form of




26. Which one of the following mineral elements plays an in biological nitrogen fixation?




27. Oxygen scavangers present in root nodules of legumes is




28. Which one of the following is not a micronutrient?




29. Which of the following is not a macronutrient




30. Insectivorous plants grow where




31. Phytotron is meant for




32. Toxicity of which element leads to the appearance of brown spots on leaves




33. Presence of phosphorus




34. Which element is required for opening and closing of stomata?




35. Exanthema is due to deficiency of




36. NPK denotes




37. The rate of photosynthesis is controlled by




38. The end product of the Calvin cycle is ______.




39. The primary carbon dioxide acceptor in C4 cycle is




40. The law of limiting factor was given by




41. Manganese is required in




42. Which of the following is not an accessory pigment?




43. Besides water and CO2, which is more essential a raw material for food formation




44. In actively gro – wing young plants, the best data for estimating the rate of photosynthesis would be




45. Discovery of Emerson effect has already shown the




46. Translocation of sugar in flowering plants occurs in the form of




47. Where are thylakoids and grana located?




48. Who enunciated the law of limiting factor for photosynthesis?




49. Who enunciated the law of limiting factor for photosynthesis?




50. Which one of the following statement is true for ATP?




51. Kranz anatomy is a feature of




52. Which of the following is a 4-carbon compound?




53. Which of the following process (C4 cycle) occurs in bundle sheath cells?




54. Light reactions of photosynthesis occurs in




55. Water stress causes




56. R.Q is ratio of




57. Angiosperm pollen is generally released at the




58. The complete oxidation of pyruvate take place in




59. Which enzyme catalyses the reaction below? Pyruvic acid → Carbon dioxide + Ethanol




60. TCA cycle was discovered by




61. Which one of the following describes the spikelet of a cereal or grass plant




62. Malacophily means




63. Herkogamy is a contrivance for




64. Out of 36 ATP molecules produced per glucose molecule during respiration




65. Complete the reaction. _________ + O2 → CO2 + _______ + Energy




66. The significant morphological feature of passion flower is the presence of




67. The final electron acceptor in electron transport chain is




68. Which of the following acts as mobile carrier for transfer of electrons between complex III and complex IV?




69. Aleurone layer takes part in




70. A characteristic of drupe is




71. Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is know as




72. End product of glycolysis is




73. Respiratory quotient of carbohydrates is




74. One molecule of glucose yields ___ ATP molecules in aerobic respiration.




75. Typical plant growth shows _________ curve




76. Exponential growth of the plants is express as W1 = W0 ert r represents




77. Opening of floral buds into flowers, is a type of:




78. Plants grow throughout their life due to




79. Which one of the followings is a gaseous plant hormone?




80. To prevent over – ripening, bananas should be