49. Lysosomal lumen is maintained at an acidic pH by: (a) de novo generation of H+ ions in the lysosomes (b) H+ ATPase that pumps H+ ions into lysosomes (c) […]
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DBT BET JRF 2019 Previous Year Questions and Video solution
Understanding the Mutation Leading to Loss of N-terminal Amino Acid in a Nascent Polypeptide
92. A mutation in the coding region of a mammalian gene leads to the loss of a single amino acid at the Nterminus of the nascent polypeptide. This is possible […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Understanding the Impact of Ionizing Radiation on DNA: Assertion and Reason Analysis
48. Given below are two statements: one is labelled as Assertion A and the other is labelledas Reason R. Assertion A: Ionizing radiation can cause damage to the DNA Reason […]
DBT BET JRF 2019 Previous Year Questions and Video solution
Best Assay to Detect and Quantify Small and Low-Abundant Peptides in Biological Samples
What would be the best assay to detect and quantify a small and low abundant peptide in a biological sample? (1) Lowry’s assay (2)Immuno-diffusion (3)Radioimmunoassay (4)Immunoblot Introduction: Peptides, especially those […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Understanding Type IIP Restriction Endonucleases and Their Characteristics
47. Type IIP restriction endonucleases will always: (a) Bind to double strand RNA (b) Cleave outside the recognition sequence (c) Generate blunt ends (d) Recognize palindromic sequence What Are Type […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
Diagnosis of Giardiasis: Why Stool Samples Are the Gold Standard
The biological sample used for diagnosis of Giardiasis is 1. blood 2. sputum 3. urine 4. stool Introduction Giardiasis is a common intestinal parasitic infection caused by Giardia lamblia, a […]
DBT BET JRF 2019 Previous Year Questions and Video solution
Understanding T Cell Anergy: Mechanisms and Implications in Immune Tolerance
89. Under which of the following circumstances do T cells develop anergy? (1) With the expression of CD69 on T cells. (2) When the CD4/ CD8 molecules present on T […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Why RNA Isolation Requires More Precautions Than DNA Isolation: Key Factors Explained
46. Though DNA and RNA are nucleic acids, isolating RNA in the laboratory requires extreme precautions and pre-preparations than isolating DNA. This could be because: (a) RNA is more prone […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
Understanding the agamous (ag) Mutant in Arabidopsis: Why Stamens and Carpels Are Absent
Which of the following floral whorls are absent in agamous (ag) mutant of Arabidopsis? 1. petals and stamens 2. sepals and petals 3. stamens and carpels 4. sepals and carpels […]
DBT BET JRF 2021 Previous Year Questions and Video solution
What Type of Enzyme is Telomerase? Understanding Its Role in Chromosome Maintenance
45. The Telomerase enzyme is a: (a) DNA–dependent DNA Polymerase , (b) DNA–dependent RNA Polymerase , (c) Reverse Transcriptase , (d) RNA–dependent RNA Polymerase Telomerase Enzyme: A Unique Reverse […]
