Cytotoxic T cells generally recognize antigen in association with: (1) class II MHC determinants (2) class I MHC determinants (3) class III MHC determinants (4) HLA-DR determinants Cytotoxic T Cells […]
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DBT BET JRF 2019 Previous Year Questions and Video solution
How Does the Egg Prevent Polyspermy?
Which one of the following assures prevention of polyspermy in an egg? (1) Activation of PI3 kinase (2)Cortical reaction (3) Acrosome reaction (4) Cross-linking between ZP1 and ZP3 Prevention of […]
DBT BET JRF 2019 Previous Year Questions and Video solution
Transmission Electron Microscopy Based Freeze-Fracture Technique
Which one of the following is used to study the structural details of biological tissues using freeze-fracture technique? (1) Scanning electron microscopy (2) Transmission electron microscopy (3) Atomic force microscopy […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Biochemical Conversion of L-Pyruvate to L-Lactate
46. Conversion of L-pyruvate to L-lactate is an example of: (a)Isomerisation (b)Oxidation (c)Reduction (d)Transesterification Biochemical Conversion of L-Pyruvate to L-Lactate The conversion of L-pyruvate to L-lactate is a critical biochemical […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
Why is Chlorine Assigned an Atomic Weight of 35.5?
Chlorine is assigned and atomic weight of 35.5. This is due to 1. presence of half of proton 2. none of the given options 3. presence of isotopes 4. presence […]
DBT BET JRF 2019 Previous Year Questions and Video solution
Bovine Spongiform Encephalopathy is Causes by Prions
Bovine spongiform encephalopathy is a disease caused by: (1) Fungus (2) Bacteria (3) Prions (4) Viroids Bovine Spongiform Encephalopathy: What Causes This Deadly Disease? Bovine Spongiform Encephalopathy (BSE), commonly known […]
DBT BET JRF 2021 Previous Year Questions and Video solution
Understanding DNA Polymerase: Key Functions in DNA Replication
45. During replicationDNA polymerase- (a)Can initiate DNA synthesis de novo (b)Cannot initiate DNA synthesis de novo (c)Synthesizes DNA in 3´ to 5´ direction (d)Unwinds DNA in a 5´ to 3´ […]
DBT BET JRF 2019 Previous Year Questions and Video solution
Variable Number of Tandem Repeats (VNTR) in DNA Fingerprinting
Variable number of tandem repeats (VNTR) in DNA molecule are highly useful in: (1) Fingerprinting (2) Footprinting (3) Gene annotation (4) DNA repair The Role of Variable Number of Tandem […]
DBT BET JRF 2021 Previous Year Questions and Video solution
How Coughing Facilitates the Transmission of Infectious Diseases
43. Which one among the following can be effectively transmitted from person to person due to coughing? (a)AIDS & Tuberculosis (b)Dengue & COVID-19 (c)Malaria & Typhoid (d)Swine Flu & Adenovirus […]
DBT BET JRF 2020 Previous Year Questions and Video solutions
Understanding Termination Process in Automated DNA Sequencing
The most important step of an automated DNA sequencing reaction is 1. specific and systematic termination of the amplified DNA 2. ligation of DNA template 3. addition of calcium chloride […]
