If a nonsense mutation is present in the Lacz gene of the lac operon, the mRNA of βgalactosidase would 1. be expressed in response to binding of the lac repressor […]
Blog
DBT BET JRF 2019 Previous Year Questions and Video solution
Title: Understanding Cellular Changes During Directional Migration in Eukaryotic Cells
74. Which one of the following changes occurs in a directionally migrating eukaryotic cell? (1) The ER is fragmented. (2) The mitochondrial membrane potential drops. (3) The nucleus moves towards […]
DBT BET JRF 2019 Previous Year Questions and Video solution
Title: Understanding the Impact of Nondisjunction in Meiosis II
73. If nondisjunction of a chromosome occurs in meiosis II, what will be the product at the completion of meiosis? (1) All the gametes will be diploid (2) Two gametes […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Why Digitalis is Used for Treating Congestive Heart Failure
36. Digitalis is used for the treatment of congestive heart failure because: (a) It can dissolve clots to release congestion , (b) It can increase the force of contraction of […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
What Is Autophagy? Understanding the Cell’s Recycling Process
The following cellular process involves formation of double membrane vesicles that engulf and degrade the cellular organelles and macromolecules 1. Necrosis 2. Autophagy 3. Macro pinocytosis 4. Apoptosis What Is […]
DBT BET JRF 2021 Previous Year Questions and Video solution
The Most Effective Reducing Agent for Disulfide Bonds in Proteins
35. Which one of the following is the most effective reducing agent of disulfide bonds in proteins? (a) 2-mercaptoethanol, (b) Dithiothreitol, (c) Ethanethiol, (d) Ethanol Introduction Disulfide bonds are critical […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Understanding Missing Amino Acids in Peptide Hydrolysis and Chromatography
34. A 20-mer peptide composed of all 20 coded standard amino acids was hydrolyzed with 6N HCl. However, only 17 amino acids were detected when the hydrolysate was analyzed by […]
DBT BET JRF 2019 Previous Year Questions and Video solution
Autonomous Retrotransposons: Understanding LINEs and Their Role in Genomic Evolution
70. Which one of the following represents an autonomous retrotransposon? (1) SINEs (2) LINEs (3) P-element (4) Tn10 🧬 Introduction: Understanding Autonomous Retrotransposons In molecular biology and genomics, transposons are […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
What Is RNA Editing? A Key Step in Post-Transcriptional Gene Regulation
Which one of the following involves RNA Editing? 1. deletion, insertion or chemical modification of nucleotides that are present in the mRNA 2. joining of exons from one pre-mRNA molecule […]
DBT BET JRF 2019 Previous Year Questions and Video solution
Understanding Genomic DNA Denaturation and Renaturation: Which Regions Renature the Fastest?
69. In genomic DNA denaturation and renaturation experiments, which one of the following regions would renature the earliest? (1) Single-copy gene (2) Satellite DNA (3) Pseudogenes (4)Multi copy gene families […]
