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? […]
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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 2020 Previous Year Questions and Video solutions
Why Proline Disrupts the Alpha-Helix Structure in Proteins
Which of the following amino acids is most likely to disrupt an 𝜶 − 𝒉𝒆𝒍𝒊𝒙? 1. proline 2. valine 3. lysine 4. arginine Introduction The α-helix is a common […]
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 2020 Previous Year Questions and Video solutions
Understanding the Role of Histones in Nucleosomes: Which Histone Is Not Part of the Core?
Which histone is NOT a part of the nucleosomes? 1. H2B 2. H2A 3. H3 4. H1 Introduction Histones are fundamental to the structure of DNA within the cell. […]
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 2020 Previous Year Questions and Video solutions
How Glyphosate Inhibits Plant Growth by Targeting 5-enolpyruvylshikimate-3-phosphate Synthase
The broad- spectrum herbicide glyphosate, the active ingredient of Roundup, inhibits this enzyme 1.Shikimate dehydrogenase 2. 5-enolpyruvylshikimate-3-phosphate synthase 3.Chorismate synthase 4. 3-deoxy-7-phosphoheptulonate synthase Introduction Glyphosate is a widely used […]
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 […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Understanding the Role of Gibberellins in Plant Growth
60. Which one of the following statements are TRUE for gibberellins? A. Gibberellins promote seed germination B. Gibberellins cannot stimulate leaf growth C. Gibberellins cannot stimulate stem growth D. Gibberellins […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
Understanding Phytochrome B’s Role in Etiolated Seedlings and Light Sensitivity
Which class of phytochromes is highly abundant in etiolated seedlings and is also light labile? 1.Phytochrome D 2.Phytochrome B 3.Phytochrome A 4.Phytochrome C Introduction Phytochromes are a group of photoreceptor […]
