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Q56.  Match the cell/tissue types in GROUP I with their corresponding total DNAcontent in GROUP II of a typical diploid Angiosperm species and choosethe CORRECT option (C denotes DNA content […]

Q55. In spiral phyllotaxis, leaves are initiated sequentially on the meristem withtwo successive primordia being separated by golden angle. If a plantfollows right–handed spiral phyllotaxis when looked down the meristem,then […]

Q54. Which of the following enzyme(s), when overexpressed, would result in ricegrains with increased β–carotene content?(A) Phytoene synthase(B) Carotene desaturase(C) β–glucoronidase(D) Enolpyruvalshikimate–3–phosphate synthase (EPSPS) Phytoene synthase and carotene desaturase overexpression […]

Q53. Which of the following cellular component(s) is/are NOT part(s) ofcytoskeleton in Angiosperms?(A) Microtubules(B) Microfilaments(C) Intermediate filaments(D) Centrioles Centrioles are not part of the cytoskeleton in angiosperms. The cytoskeleton in plant […]

Q52. The structures of four plant hormones are shown. Identify the CORRECThormone that is responsible for bending of coleoptile of canary grass inresponse to unidirectional white light. Auxin is the […]

Q51. The figure shows the germination percentage of imbibed seeds treated withthe given sequence of red (R) and far–red (F) light (each exposure lasting 5min). The percentage of germination was […]

Q50. Phytoalexins play important role in plant defense against pathogens.Choose the INCORRECT option related to phytoalexins.(A) Phytoalexins belong to secondary metabolites.(B) Phytoalexins have antifungal activity.(C) Phytoalexins are abundant in plants […]

Q49. Which ONE of the following organelles controls gravitropism in the roots of higher plants? (A) Chromoplast (B) Amyloplast (C) Chloroplast (D) Etioplast Amyloplasts control gravitropism in roots of higher […]

Q48. Which ONE of the following statements regarding spores and gametes isCORRECT?(A) Spores can directly undergo mitosis whereas gametes cannot.(B) Gametes can directly undergo mitosis whereas spores cannot.(C) Neither spores […]

Q47. Which ONE of the following plant taxa contains vascular tissue (xylem andphloem) but not woody tissue?(A) Oak(B) Moss(C) Pine(D) Fern Vascular plants transport water and nutrients through xylem and […]