59. Which one of the following is a non-climacteric fruit? (a) Jackfruit (Artocarpusheterophyllus) (b) Tomato (Solanumlycopersicum) (c) Wild banana (Musa balbisiana) (d) Wild strawberry (Fragariavesca) Introduction Fruits are classified into […]
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DBT BET JRF 2021 Previous Year Questions and Video solution
Effect of Hormones on Seed Germination in Arabidopsis thaliana
58. Seeds of Arabidopsis thaliana placed on Murashige and Skoog (MS) media without anyhormones germinates faster than in the medium that contains: (a) Abscisic acid (b) Auxin (c) Cytokinin (d) […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
Understanding Glycine’s Role in the Ramachandran Map
The amino acid residue with the least preference for any quadrant in the Ramachandran map is 1. Valine 2. glycine 3. serine 4. alanine Introduction The Ramachandran map is a […]
DBT BET JRF 2021 Previous Year Questions and Video solution
The First Alkaloid to Be Isolated and Characterized from Plants
57. The first alkaloid to be isolated and characterized from plants is: (a) Caffeine (b) Cocaine (c) Morphine, (d) Quinine Introduction Alkaloids are a diverse group of naturally occurring organic […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Infection Mechanism of Rice Blast Fungus and Its Specialized Structures
56. The rice blast fungus Magnaporthegrisea, invades rice plants in a manner typical ofmany foliar pathogens by producing specialized infection structures called: (a) Appressoria (b) Infection tube (c) Mycota (d) […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
Green Sulfur Bacteria: Marine Phototrophs Using Carbon Dioxide as a Carbon Source
Which of the following marine phototrophs can utilise carbon-dioxide as the carbon source? 1. Green sulfur bacteria 2. Halobacteria 3. Chloroacidobacteria 4. Hellobacteria Introduction Marine environments are home to a […]
DBT BET JRF 2021 Previous Year Questions and Video solution
The Most Appropriate Explants for Producing Virus-Free Plants through Micropropagation
55. A plant species nearing its extinction due to viral infection has been chosen formicropropagation by tissue culture. Which explants will be the most appropriate toproduce virus-free plants? A. Shoot […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
Chemotherapeutic Drug Trabectedin: A Marine-Derived Cancer Treatment
Which of the following is a chemotherapeutic drug obtained from marine source? 1. adriamycin 2. avastin 3. trabectedin 4. abraxane Introduction Chemotherapy is a vital part of cancer treatment, […]
DBT BET JRF 2021 Previous Year Questions and Video solution
The Effect of Red and Far-Red Light on Flowering in Plants
54. When the critical night length in winters is disrupted by a pulse of red light followed bya pulse of far red light: (a) Both long-day and short day plants […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
Understanding the Correct Sequence of Pathogenesis in Infectious Diseases
Which of the following represents the correct sequence of steps in pathogenesis? 1. adhesion, exposure, infection, invasion 2. adhesion, infection, exposure, invasion 3. invasion, infection, adhesion, exposure 4. exposure, adhesion, […]
