70. Which one of the following statements are TRUE regarding specialized embryonic structures peculiar to the grass family? A. Thecotyledon has been modified by evolution to form an absorptive organ […]
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DBT BET JRF 2021 Previous Year Questions and Video solution
Flowering in Winter Annual Arabidopsis: The Role of Cold Treatment
69. Which one of the following treatments is required for flowering in a winter annual typeof Arabidopsis plants? (a) A short pulse of cold temperature (b) A short pulse of […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Selection Markers in Transgenic Plants: The Role of Hygromycin Phosphotransferase
68. Which one of the following can be used as a selection marker for developing transgenicplants? (a)□galactosidase (b) □glucoronidase (c) Green fluorescent protein (d) Hygromycin phosphotransferase Understanding Selection Markers in […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Key Characteristics of Skotomorphogenic Development in Plants
67. Which one of the following is NOT a characteristic feature of skotomorphogenicdevelopment? (a) Apical hook (b) Closed cotyledons (c) Expanded leaves (d) Long hypocotyls What Is Skotomorphogenic Development in […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Understanding the Origin of Lateral Roots in Plants
66. Lateral roots initiate from: (a) Endodermis (b) Pericycle (c) Root apical meristem (d) Root epidermis Where Do Lateral Roots Originate in Plants? In plant development, the initiation of lateral […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Role of Vir D1 and D2 Proteins in T-DNA Processing in Agrobacterium
65. The T-DNA of Agrobacterium must be cut out from its circular plasmid for its transferinto plant cells. Which one of the following Vir proteins are involved in this process? […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Overexpression of GA2-Oxidase Gene in Wheat Results in Dwarf Phenotype
64. The GA2-oxidase gene from bean is overexpressed in a wheat plant by geneticengineering. Which one of the following phenotypes correctly describes the resultanttransgenic plant? (a) The height of the […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Callose: The Polysaccharide Induced During Plant Pathogen Attack
63. Which one of these polysaccharides is induced after a pathogen or microbial attack? (a) Arabinoxylan (b) Callose (c) Cellulose (d) Pectin Callose: A Key Defense Polysaccharide in Plants When […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Understanding Anti-Herbivore Defense in Plants: Role of Alkaloids
62. Which one of the following classes of compounds is generally accumulated as an antiherbivore response in plants? (a) Alkaloids (b) Glucose (c) Sucrose (d) Tannins Understanding Anti-Herbivore Compounds in […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Understanding Secondary Metabolites in Plants
61. Which one of the following is not a secondary metabolite? (a) Acetyl-CoA (b) Coumarins (c) Flavonoids (d) Squalene Introduction Secondary metabolites are a class of compounds produced by plants […]
