DBT JRF PYQ-2023 Archives - Page 3 of 20 - CSIR NET LIFE SCIENCE COACHING | NTA NET LIFE SCIENCE

DBT BET JRF 2023 Previous Year Questions and Video solutions

Understanding Chemostat Culture Dynamics: Key Concepts and Misconceptions

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April 14, 2025
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95. For a chemostat culture operating under steady state, which of the following statements is NOT true? 1. At a dilution rate equal to maximum specific growth rate, the culture […]

In a single stage continuous extraction system, solvent is added to cell-free culture filtrate containing the product. If the partition coefficient of the product is 5, then to extract 90% of the product, assuming ideal single stage, the flow rate of solvent should be times the flow rate of the culture filtrate. 1. 1.5 times 2. 1.8 times 3. 2.1 times 4. 2.4 times

DBT BET JRF 2023 Previous Year Questions and Video solutions

Solvent Flow Rate Calculation in Single-Stage Continuous Extraction

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April 14, 2025
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94. In a single stage continuous extraction system, solvent is added to cell-free culture filtrate containing the product. If the partition coefficient of the product is 5, then to extract […]

A. Interleukin-2 (IL-2) I. Activates NK cells and T cells; potently induces production of Interferons; shifts immune response to 𝑇𝐻1 B. Interferon-𝛾 (IFN-𝛾) II. Major mediator of inflammation; stimulate macrophages and cytokine production C. Tumor necrosis factor (TNF) III. Strong macrophage-activating factor; causes a variety of cells to express class II MHC molecules. D. Interleukin-12 (IL- 12) IV Major growth factor for T and B cells; enhances cytolytic activity of natural killer cells Choose the correct answer from the options given below:

DBT BET JRF 2023 Previous Year Questions and Video solutions

Matching Cytokines with Their Immune Functions

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April 14, 2025
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119. Match List I with List II LIST I […]

BLOSUM scoring matrix is used for 1. alignment of DNA sequences only 2. alignment of DNA and protein sequences only 3. alignment of protein sequences only 4. homology modelling

DBT BET JRF 2023 Previous Year Questions and Video solutions

What Is the BLOSUM Scoring Matrix Used For?

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April 14, 2025
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93. BLOSUM scoring matrix is used for 1. alignment of DNA sequences only 2. alignment of DNA and protein sequences only 3. alignment of protein sequences only 4. homology modelling […]

1000 𝑑𝑚3 of fermentation medium containing 1 × 104 Bacillus thuringenesis cells per 𝑐𝑚3 is sterilized to achieve probability of contamination of 1 in 1000. Calculate the Del factor. 1. 33.5 2. 29.9 3. 23.0 4. 13.8

DBT BET JRF 2023 Previous Year Questions and Video solutions

How to Calculate Del Factor in Sterilization of Fermentation Media

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April 14, 2025
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92. 1000 𝑑𝑚3 of fermentation medium containing 1 × 104 Bacillus thuringenesis cells per 𝑐𝑚3 is sterilized to achieve probability of contamination of 1 in 1000. Calculate the Del factor. […]

Which of the following will generally NOT occur if the function of myosin I and myosin II is blocked? 1. Apoptosis 2. Cell crawling 3. Phagocytosis 4. Vesicle transport

DBT BET JRF 2023 Previous Year Questions and Video solutions

Impact of Blocking Myosin I and Myosin II on Cellular Functions

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April 14, 2025
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120. Which of the following will generally NOT occur if the function of myosin I and myosin II is blocked? 1. Apoptosis 2. Cell crawling 3. Phagocytosis 4. Vesicle transport […]

The function of sieve tube in plants includes transmission of A. Chemical signals B. mRNAs C. electrical signals D. spheroplasts

DBT BET JRF 2023 Previous Year Questions and Video solutions

Understanding the Function of Sieve Tubes in Plants

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April 14, 2025
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121. The function of sieve tube in plants includes transmission of A. Chemical signals B. mRNAs C. electrical signals D. spheroplasts 1. b. c and d only 2. a, b […]

Assertion A: Threading is a de novo protein structure prediction method suitable for sequence with very low similarities. Reason R: The threading method is more efficient than homology modelling. In the light of the above statements, choose the most appropriate answer from the options given below

DBT BET JRF 2023 Previous Year Questions and Video solutions

Understanding Threading in Protein Structure Prediction

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April 14, 2025
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122. Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: Threading is a de novo protein structure prediction […]

Equine embryo collection is commonly performed on day 7 or 8 (day ovulation) because 1. the embryo has separated from placenta 2. the embryo has crossed all the developmental stages 3. recovery are high and the blastocysts can be easily recovered and handled 4. the lifespan of embryo is limited to 9 days

DBT BET JRF 2023 Previous Year Questions and Video solutions

The Best Time for Equine Embryo Collection: Day 7 or 8 Post-Ovulation

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April 14, 2025
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123. Equine embryo collection is commonly performed on day 7 or 8 (day ovulation) because 1. the embryo has separated from placenta 2. the embryo has crossed all the developmental […]