5. Which one of the following strategies do viruses employ to evade the human immune system? (a) Virus binds to TCR and blocks activation of T-cells, (b) Virus infected cells […]
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DBT BET JRF 2021 Previous Year Questions and Video solution
Understanding Tumor Suppressor Genes and Their Role in Cancer Development
4. You have recently observed a mutation in gene X in patients with lung cancer. You have sequenced the gene X in these patients and have observed that (i) both […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
How Nucleic Acid Structures Are Stabilized: The Role of Hydrophobic Interactions and Hydrogen Bonds
Nucleic acid structures are stabilized by 1. hydrophilic interactions 2. covalent interactions 3. covalent and hydrophilic interactions 4. hydrophobic interactions and hydrogen bonding How Are Nucleic Acid Structures Stabilized? […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Immunoglobulin IgE and Its Role in Type-I Hypersensitivity Reactions
3. Which one of the Immunoglobulins (Ig) cause type-I hypersensitive immune reaction? (a) .IgA, (b) .IgE, (c) .IgG, (d) .IgM, Article: Introduction Type-I hypersensitivity reactions, commonly known as allergic reactions, […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Understanding the ELISPOT Assay: Measuring Cytokine Release at the Single-Cell Level
2. Enzyme-linked immunospot (ELISPOT) assay measures: (a) Cytokine concentration in culture supernatant , (b) Expression of cytokine gene (c) Intracellular cytokine concentration (d) Number of cytokine releasing cells at single […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
How Enzymes Bind Substrates: The Role of Hydrogen Bonds, Hydrophobic Interactions, and Shape Complementarity
Enzymes bind their substrates via 1. hydrogen bonds 2. hydrophobic interactions 3. all of the given options are correct 4. shape complementarity Understanding How Enzymes Bind Substrates Enzymes are biological […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Why Topoisomerase is Not Needed in PCR Reactions: An In-depth Explanation
1. DNA replication requires DNA-Topoisomerase to remove the supercoiling of DNA that accumulates at the end of a growing replication fork. You wish to perform a PCR amplification of a […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
What Happens to Ovalbumin When You Boil an Egg? Understanding Protein Denaturation
The egg white protein, ovalbumin, is denatured in a hard-boiled egg. Which of the following i least affected? 1. quaternary structure of ovalbumin 2. primary structure of ovalbumin 3. secondary […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Understanding Type-I Hypersensitivity: The Role of IgE in Allergic Reactions
53. Which one of the Immunoglobulins (Ig) cause type-I hypersensitive immune reaction? (a)IgA (b)IgE (c)IgG (d)IgM Article: Introduction Type-I hypersensitivity refers to allergic reactions that occur rapidly after exposure to […]
DBT BET JRF 2019 Previous Year Questions and Video solution
How Many Runs Should a Cricketer Score to Increase Batting Average
A cricketer has an average of 62 runs after playing 25 innings. How many runs should he score in the next innings so as to increase his average to 65 […]
