Q.33 Which of the following is(are) involved in the activation of cytotoxic T cells?(A) MHC I(B) FcR(C) T cell receptor(D) CTLA 4 MHC class I (MHC I), the T cell […]
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IIT JAM Biotechnology Previous Year Question Paper 2020 –Video Solution
Photosynthesis in C3, C4, and CAM Plants
Q.32 Which of the following is(are) TRUE about photosynthesis?(A) In C3 plants the first organic product of carbon fixation is 3-phosphoglycerate(B) In C4 plants the first organic product of carbon […]
IIT JAM Biotechnology Previous Year Question Paper 2020 –Video Solution
Which Compounds are Auxins?
Q.31 Which of the following is(are) auxins?(A) 1-Naphthaleneacetic acid(B) Indole-3-butyric acid(C) 2,4-Dichlorophenoxyacetic acid(D) Indole-3-acetic acid All options (A), (B), (C), and (D) are auxins, commonly tested in CSIR NET Life […]
IIT JAM Biotechnology Previous Year Question Paper 2020 –Video Solution
IR band at 1715 cm⁻¹ and NMR triplet–quartet for C₅H₁₀O
Q.30 IR spectrum of a compound C5H10O shows a band at 1715 cm^–1. The same compound showedtwo signals, a triplet and a quartet, in its NMR spectrum. Identify the compound […]
![Q.29 Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]. Assertion [a]: lac operon is an inducible operon. Reason [r]: lac operon is not induced when the repressor protein remains bound to operator DNA sequence. (A) Both [a] and [r] are true and [r] is the correct reason for [a] (B) Both [a] and [r] are true but [r] is not the correct reason for [a] (C) Both [a] and [r] are false (D) [a] is true but [r] is false](https://www.letstalkacademy.com/wp-content/uploads/2025/12/slide_29-9.jpg)
IIT JAM Biotechnology Previous Year Question Paper 2020 –Video Solution
Lac Operon is Inducible Operon
Q.29 Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].Assertion [a]: lac operon is an inducible operon.Reason [r]: lac operon is not induced when the […]
IIT JAM Biotechnology Previous Year Question Paper 2020 –Video Solution
Grignard Reaction of Acetone with Ethylmagnesium Iodide
Q.28 In the following reaction, X is an intermediate and Y is one of the end products.Which one of the following compounds is the end product Y? The reaction of […]
IIT JAM Biotechnology Previous Year Question Paper 2020 –Video Solution
Simplest Optically Active Alkane
Q.27 Which one of the following compounds is the simplest alkane that is optically active? Option (C) is the correct answer: among the given structures, the simplest alkane that is […]
IIT JAM Biotechnology Previous Year Question Paper 2020 –Video Solution
Decreasing Order of pKa Values
Q.26 The following carboxylic acids have a general formula, R-COOH.(i) HCOOH(ii) CH3 – COOH(iii) ClCH2 – COOH(iv) CF3 – COOHWhich one of the following represents the decreasing order of their […]
IIT JAM Biotechnology Previous Year Question Paper 2020 –Video Solution
Protein Analysis Techniques Matching
Q.25 Match the techniques in Group I with their applications in Group II for protein analysisGroup I […]
![Q.24 Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]. Assertion [a]: The difference in the respective melting points of butter and coconut oil is caused by the degrees of saturation of the corresponding fatty acid chain. Reason [r]: Unsaturated fatty acid chains in fats/lipids become solid more easily because they are relatively straight and thus able to pack together more closely than saturated chain. (A) Both [a] and [r] are true and [r] is the correct reason for [a] (B) Both [a] and [r] are true but [r] is not the correct reason for [a] (C) Both [a] and [r] are false (D) [a] is true but [r] is false](https://www.letstalkacademy.com/wp-content/uploads/2025/12/slide_24-9.jpg)
IIT JAM Biotechnology Previous Year Question Paper 2020 –Video Solution
Butter vs Coconut Oil Melting Points
Q.24 Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].Assertion [a]: The difference in the respective melting points of butter and coconut oil iscaused by […]
