Plant Growth & Development PYQs Set 2 (PDF)

Set 2 of 2 · Questions 31-58 of 58

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Mere Teacher · Previous Year Questions NEET Biology · Plant Growth & Development · Set 2 (Q31-58)
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31. $"Foolish seeding" disease of rice led to the discovery of :-$ (1) $IAA$ (2) $GA$ (3) $ABA$ (4) $2, 4-D$ 32. $How does pruning help in making the hedge dense$ (1) $The apical shoot grows faster after pruning$ (2) $It releases wound hormones$ (3) $It induces the differentiation of new shoots from the rootstock$ (4) $It frees axillary buds from apical dominance$ 33. $Which of the following enhances or induces fusion of protoplast?$ (1) $Sodium chloride and potassium chloride$ (2) $Polyethylene glycol and sodium nitrate$ (3) $IAA and kinetin$ (4) $IAA and gibberellins$ 34. $What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows?$ (1) $Green plants need the right light to perform photosynthesis.$ (2) $Green plants seek light because they are phototropic.$ (3) $Light stimulates plant cells on the lighted side to grow faster.$ (4) $Auxin accumulates on the shaded side, stimulating greater cell elongation there.$ 35. $Removal of apical dominance by decapitation is utilised for :$ (1) $Early senescence$ (2) $Hedge making$ (3) $Preparing weed-free lawns$ (4) $Suppressing the activity of intercalary meristem$ 36. $A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white coloured like albinos. Which of the following terms will you use to describe them?$ (1) $Mutated$ (2) $Embolised$ (3) $Etiolated$ (4) $Defoliated$ 37. $Importance of day length in flowering of plants was first shown in:-$ (1) $Cotton$ (2) $Petunina$ (3) $Lemna$ (4) $Tobacco$ 38. $In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as:$ (1) $Senescence$ (2) $Differentiation$ (3) $Dedifferentiation$ (4) $Development$ 39. $Which of the following is the correct equation of exponential growth?$ (1) $N_{t} = N_{0} e^{r pt}$ (2) $N_{t} = N_{0} e^{r s t}$ (3) $N_{t} = N_{0} e^{r t}$ (4) $N_{t} = N_{0} e^{r n t}$ 40. $Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called :$ (1) $Elasticity$ (2) $Flexibility$ (3) $Plasticity$ (4) $Maturity$ 41. $Photoperiodism was first characterised in :$ (1) $Tobacco$ (2) $Potato$ (3) $Tomato$ (4) $Cotton$ 42. $Which one of the following acids is a derivative of carotenoids?$ (1) $Indole - 3 - acetic acid$ (2) $Gibberellic acid$ (3) $Abscisic acid$ (4) $Indole butyric acid$ 43. $The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is :-$ (1) $Differentiating$ (2) $Maturing$ (3) $Elongating$ (4) $Widening$ 44. $Which hormone promotes internode/petiole elongation in deep water rice?$ (1) $2,4-D$ (2) $GA_{3}$ (3) $Kinetin$ (4) $Ethylene$ 45. $Which of the following growth regulators is an adenine derivative?$ (1) $Auxin$ (2) $Cytokinin$ (3) $Ethylene$ (4) $Abscisic acid$ 46. $What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows?$ (1) $Green plants seek light because they are phototropic$ (2) $Light stimulates plant cells on the lighted side to grow faster$ (3) $Auxin accumulates on the shaded side, stimulating greater cell elongation there$ (4) $Green plants need light to perform photosynthesis$ 47. $Which of the following is incorrectly matched pair?$ (1) $Ethylene - Cousins$ (2) $Kinetin - Skoog and Miller$ (3) $Gibberellic acid - F.W. Went$ (4) $Auxin - Darwin and Darwin$ 48. $Vernalization stimulates flowering in$ (1) $Turmeric$ (2) $Carrot$ (3) $Ginger$ (4) $Zamikand$ 49. $Who coined the term 'Kinetin'?$ (1) $Skoog and Miller$ (2) $Darwin$ (3) $Went$ (4) $Kurosawa$ 50. $Auxin can be bioassayed by$ (1) $Hydroponics$ (2) $Potometer$ (3) $Lettuce hypocotyl elongation$ (4) $Avena coleoptile curvature$ 51. $Phytochrome is a :-$ (1) $Lipoprotein$ (2) $Chromoprotein$ (3) $Flavoprotein$ (4) $Glycoprotein$ 52. $One of the synthetic auxin is :-$ (1) $IAA$ (2) $GA$ (3) $IBA$ (4) $NAA$ 53. $Typical growth curve in plants is :-$ (1) $Linear$ (2) $Stair-steps shaped$ (3) $Parabolic$ (4) $Sigmoid$ 54. $Root development is promoted by$ (1) $Abscisic acid$ (2) $Auxin$ (3) $Gibberellins$ (4) $Ethylene$ 55. $Auxin can be bioassayed by :$ (1) $Lettuce hypocotyl elongation$ (2) $Avena coleoptile curvature$ (3) $Hydroponics$ (4) $Potometer$ 56. $Root development is promoted by :$ (1) $Auxin$ (2) $Gibberellin$ (3) $Ethylene$ (4) $Abscisic acid$ 57. $Vernalisation stimulates flowering in :$ (1) $Carrot$ (2) $Ginger$ (3) $Zamikand$ (4) $Turmeric$ 58. $The Avena curvature is used for bioassay of:$ (1) $ABA$ (2) $G A_{3}$ (3) $IAA$ (4) $Ethylene$