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Biology MCQS[NEET-2021 to 2022]-Plant anatomy mcq for competitive exams

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1. Which is not related to transpiration?




2. Difference between osmotic pressure and turgor pressure is




3. Path of water movement from soil to xylem is




4. Assertion Dried seeds of Pea are kept in tin, water is poured over them up to upper level. A lid is put tight over it. Within an hour the lid is blown off Reason Due to rapid cell division in Pea see




5. Guttation is mainly due to




6. Which one is not connected with transport across the cell membrane




7. A semipermeable membrane allows the diffusion of




8. Exchange of substances between a cell and its environment is due to




9. Mannitol is storage food in




10. Which of the following is a synthetic auxin?




11. Function of red pigment leghaemoglobin present in root nodules of leguminous plants is to regulate




12. Essential macronutrients are




13. Gene responsible for nitrogen fixation is




14. An essential element is that which




15. Denitrification is carried out by




16. Which plant hormone plays an important role in seed dormancy and germination respectively




17. Plants absorb nitrogen as




18. The conditions necessary for vernalization are: (i) High temperature and water. (ii) Low temperature and water. (iii) Water and Carbon dioxide. (iv) Oxygen and water.




19. Function of leghaemoglobin during biological nitrogen fixation in root nodules of legumes is to




20. Auxins are mainly produced by




21. Active transport occurs




22. Plant hormone associated with climacteric respiration:




23. Element which is a component of proteinaceous materials and protoplasm is




24. Minerals are absorbed in the form of




25. Choose the wrong pair:




26. Assertion: Nitrogen fixing bacteria of legume root nodules survive in oxygen depleted cells. Reason: Leghaemoglobin completely removes oxygen from nodule cells




27. Plant ash indicates




28. Nitrifying bacteria convert




29. The enzymes required for nitrogen fixation is




30. Photoperiodism is:




31. Which group of three micronutrient elements affect both photosynthetic and mitochondrial electron transport?




32. Count the number of true statements: (i) Application of gibberellins help early seed production in conifers. (ii) All synthetic auxins are widely used as herbicides. (iii) Kinetin promotes cytokin




33. Inorganic nutrients are present in the soil as




34. Find out the true statements about vernalization: (i) It is the promotion of flowering by a period of low temperature (ii) It prevents precocious reproductive development early in the growing season




35. Yield of Rice increase by




36. Which one is not a micronutrient?




37. Read the following statements: (i) Cytokinin help in lateral shoot growth. (ii) Ethylene influences horizontal growth of seedlings. (iii) ABA plays an important role in seed development. (iv) Ethy




38. Bacteria that convert ammonia to nitrite belong to




39. One hormone promotes abscission of flowers while the other delay senescence of fruits. These are respectively:




40. Brown heart disease is due to deficiency of




41. Flowering in short day plants is induced by




42. Carbohydrates, the most abundant biomolecules on earth are produced by




43. Arithmetic growth curve is linear because




44. Optimum temperature for photosynthesis is




45. Primary carboxylation occurs in C 3 and C 4 plants with the help of




46. In which type reactions related to plant photosynthesis, peroxisomes are involved




47. On the basis of the information mentioned, select the correct name of phytohormones for a,b and c respectively: (i) Hormone (a) helps in initiation of root and root hair formation at low concentratio




48. Electrons lost by PS II are regained from




49. In geometrical growth (from beginning to last), the correct sequence of growth phases and their occurrence are:




50. Photosynthesis is a process in which




51. Rate of growth stops and plants die at a temperature of




52. Effect of auxin diffusing from apical bud on lateral shoots is known as




53. Compensation point is the value of a factor where there is




54. All of the following are plant growth inhibitors except;




55. ATP is




56. Direction of conduction of food through phloem is




57. Bioassay for auxin is ..




58. Photorespiration involves oxidation of




59. Apical dominance is caused by ...




60. A chemical believed to be involved in flowering is ... .




61. One of these is herbicide ...




62. C4 plants differ from C3 plants with respect to




63. Which does not HSK pathway




64. Pigment system I performs independently




65. Read the following four statements, A, B, C and D and select the right option having both correct statements. STATEMENTS: (A) Z scheme of light reaction takes place in presence of PS I only. (B) On




66. Which one is not a C4 plant?




67. Leaf fall occurs when content of




68. In C4 photosynthesis, both C4 and C3 cycles are involved. Identify the catalytic function of RUBISco in C4 cycle




69. Identify the following: (i) They have a special type of leaf anatomy. (ii) They tolerate a high range of temperature. (iii) They show responses to high light intensities. (iv) They lack photorespi




70. How many of the following statements are true: (a) NAD mainly involved in catabolic pathway. (b) NADP mainly involved in anabolic pathway. (c) Non – cyclic electron transport is a multidirectional




71. Bulliform cells in Grass leaves show




72. Opening of flower and drooping of bud are ...




73. Why are C4 plants able to photosynthesize with no apparent photorespiration?




74. The name zeatin was coined by ...




75. Which of the following sequences correctly represents the flow of electrons during photosynthesis




76. Ability of Venus Fly Trap to capture insects is due to ...




77. How many pigments are responsible for the colour of a plant leaf?




78. In a plant subjected to continuous red light phytochrome will show ...




79. During photorespiration, the oxygen consuming reaction(s) occur in




80. Who first suggested presence of growth regulatory chemicals in plants?




81. α-Ketoglutarate dehydrogenase brings about




82. 2,4-D causes ...




83. Which one is product of aerobic respiration?




84. Which one is used for defoliation of forest trees? ..




85. As compared to anaerobic respiration, the energy gained during aerobic respiration is




86. The other name of glycolysis is




87. Statement a: Auxins promote apical dominance by suppressing activity of lateral buds Statement b: In moriculture, periodic pruning of shoot tips is done to makes Mulberry plants bushy




88. Oxidation of one molecule of glucose in aerobic respiration produces




89. Which of the following stimulates growth or call enlargement? ..




90. In mitochondria, protons accumulate in




91. Treatment of seeds at low temperature under moist conditions for breaking their dormancy is ... .




92. Oxidative phosphorylation refers to




93. Biennials get changed into annuals by ...




94. How many molecules of NADH are produced when four molecules of phosphoglyceraldehyde are converted into four molecules of pyruvate




95. Pigment involved in regulation/photomorphogenesis response is ...




96. Cell respiration is carried out by




97. Parthenocarpic fruit cannot be produced by application of ...




98. Flash of light in dark inhibits flowering in ..




99. When malic acid is respiratory substrate, the amount of CO2 released is