![Q.42 Determine the correctness or otherwise of the following Assertion [a] and the Reason [r] Assertion [a]: A genetically engineered rice that produces beta-carotene in the rice grain is called Golden rice Reason [r]: Enabling biosynthesis of provitamin A in the rive endosperm gives a characteristic yellow orange color (A) Both [a] and [n] are false (B) Both [a] and [r] are true but is not the correct reason for [a] (C) Both [a] and are true and is the correct reason for [a] (D) [A] is true but [r] is false](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_42-10.png)
![Q.41 Which of the following statements about gene therapy are CORRECT? [P] Affected individuals, but not their progeny, can be cured through germline gene theraphy [Q] Affected individuals, as well as their progeny, can be cured through germline gene therapy [R] Affected individuals, but not their progeny, can be cured through somatic gene theraphy [S] Affected individuals, as well as their progeny, can be cure through somatic gene therapy (A) P and R only (B) P and S only (C) Q and R only (D) Q and S only](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_41-10.png)
![Q.40 Determine the correctness or otherwise of the following Assertion [a] and the Reason [r] Assertion [a]: A typule and its immediate descendant cells are specialized and are called toipotent Reason [C]: Totipotent cells retain the capacity to differentiate into only a few cell types (A) Both [a] and [r] are false (B) Both [a] and [r] are true but [r] is not the correct reason for [a] (C) Both [a] and [r] are true and [r] is the correct reason for [a] (D) [a] is true but is false](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_40-10.png)
![Q.39 Which of the following strategies are used by cells for metabolic regulation! [P] Phosphorylation- dephosphorylation [Q] Allostery [R| Feedback inhibition (A) P and Q only (B) P and R only (C) Q and R only (D) P, Q and R](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_39-10.png)
![Q.No. 38 Match sub-cellular organelles listed in Group I with their features listed in Group II: Group I Group II P] Mitochondrion 1. Single-membrane enclosed Q] Chloroplast 2. Double-membrane enclosed R] Nucleus 3. Maternal inheritance S] Endoplasmic reticulum 4. Endosymbiotic origin Options: P-1, Q-4, R-2, S-3 P-2, Q-3, R-4, S-1 P-3, Q-4, R-2, S-1 P-3, Q-1, R-4, S-2](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_38-10.png)
![Q.37 The schematic of a plasmid with a gap in one of the strands is shown below: Which of the following enzyme(s) is/are required to fill the gap and generate a covalently closed circular plasmid? [P] DNA ligase [Q] Alkaline phosphatase [R] DNA polymerase [S] Polynucletoide Kinase](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_37-10.png)
![Q.36 Determine the correctness or otherwise of the following Assertion (a) and the Reasonv[r]. Assertion [a]: Embryonic stem cells are suitable for developing knockout mice Reason [r]: Homologous recombination is more frequent in embryonic stem cells than that in somatic cells (A) Both [a] and [r] are false (B) Both [a] and [r] are true, and [r] is the correct reason for [a] (C) Both [a] and [r] are true, but [r] is not the correct reason for [a] (D) [a] is true, but [r] is false](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_36-10.png)
![Q.35 Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]. Assertion [a]: Dam methylase protects E. coli DNA from phage endonucleases Reason [r]: E. coli Dam methylase methylates the adenosine residue in the sequence "GATC" (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 false but [r] is true](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_35-10.png)
![Q.No. 34 A list of pathogens (Group I) and a list of anti-microbial agents (Group II) used to treat their infections are given below. Match the pathogens with the corresponding anti-microbial agents. Group I Group II P] Influenza A virus 1. Isoniazid Q] Fungus 2. Amantadine R] Plasmodium 3. Fluconazole S] Mycobacterium 4. Artemisinin 5. Iodoquinol Options: P-4, Q-3, R-2, S-5 P-5, Q-2, R-4, S-1 P-2, Q-3, R-4, S-1 P-2, Q-3, R-1, S-5](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_34-10.png)
![Q.32 Some of the cytokinins used in plant tissue culture media are given below: [P] ВАР [Q Zeatin [R] Kinetin [S]2iP Which of these are synthetic analogs? (A) P and Q only (B) Q and S only (C) R and S only (D) P and R only](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_32-10.png)
![Q.No. 29 Which of the following statements are CORRECT about eukaryotic cell cycle? [P] CDKs can phosphorylate proteins in the absence of cyclins [Q] CDKs can be inactivated by phosphorylation [R] Degradation of cyclins is required for cell cycle progression [S] CDKs are not involved in chromosome condensation (A) P and R only (B) P and S only (C) P, Q and R only (D) Q and R only](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_29-11.png)
![Q.No. 28 Which of the following statements about immune response are CORRECT? [P] T cells are activated by antigen-presenting cells [Q] Foreign peptides are not presented to helper T cells by Class II MHC proteins [R] Dendritic cells are referred to as professional antigen-presenting cells (A) P and R only (B) P and Q only (C) Q and R only (D) P, Q and R](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_28-11.png)
![Q.15 Amino acid sequences of cytochrome e and ribulose S-phosphate epimerase from 40 organisms were chosen and phylogenetic trees were obtained for each of these two protein families Determine the correctness or otherwise of the following Assertion [a] and the Reason 1 Assertion (a): The two trees will not be identical Reason (r): The nature and frequency of mutations in the two families are different (A) Both [a] and are true and [r] is the correct reason for [a] (B) Both [a] and [r] are true but is not the correct reason for [a] (C) Both [a] and [r] are false. (D) [a] is false but [r] is true](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_15-11.png)
![Q.14 Which of the following are energy transducing membranes? [P] Plasma membrane of bacteria [Q] Inner membrane of chloroplasts [R] Inner membrane of mitochondria (A) P and Q only (B) P and R only (C) Q and R only (D) P, Q and R](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_14-11.png)
![Q.12 Which of the following types of molecules act as biological catalysts? [P] Protein [Q] RNA [R] Phospholipid (A) Pand only (B) P and R only (C) Q and R only (D) P, Q and R](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_12-11.png)
![Q.5 Determine the correctness or otherwise of the following Ascention (a) and the Reason (r) regarding mammalian cells. Assertion (a): Cells use Ca2+, and not Na+, for cell-to-cell signalling Reason[r): In the cytosol, concentration of Na+ is lower than that of Ca2+ ? (A) Both (a) and (r) are true and (r) is the correct reason for [a]. (B) Both (a) and rare true but [c] is not the correct reason for (a). (C) Both (a) and care false (D) [a] is true but is false.](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_5-11.png)
![Q.3 Which of the following statements are CORRECT? [P] Viruses can play a role in causing human Cancer [Q] A tumor suppressor gene can be turned off without any change in its DNA sequence [R] Alteration in miRNA expression levels contributes to the development of cancer (A) P and only (B) Q and only (C) P and only (D) P. and R](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_3-11.png)
![Q.9 For a matrix M = [mij]; i, j = 1,2,3,4, the diagonal elements are all zero and mij = -mji. The minimum number of elements required to fully specify the matrix is (A) 0 (B) 6 (C) 12 (D) 16](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_9.jpg)
Q.No. 25 A variable Y is a function of t. Given that Y(t = 0) = 1 and Y(t = 1) = 2, dY/dt in the interval t = [0, […]
![Q.No. 25 A variable Y is a function of t. Given that Y(t = 0) = 1 and Y(t = 1) = 2, dY/dt in the interval t = [0, 1] can be approximated as __________.](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_25-11.png)
Category: GATE Biotechnology 2020 Previous Year Papers with Solutions
GATE Biotechnology 2020 Previous Year Papers with Solutions
GATE Biotechnology 2020 Previous Year Papers with Solutions
Normal Random Variable Probability Greater Than 0
Q.No. 24 A normal random variable has mean equal to 0, and standard deviation equal to 3. The probability that on a random draw the value of this random variable […]
![Q.No. 23 The largest eigenvalue of the matrix [ 4 1 -2 1 ] is __________.](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_23-11.png)
GATE Biotechnology 2020 Previous Year Papers with Solutions
Largest Eigenvalue of Matrix [4 1; -2 1]
Q.No. 23 The largest eigenvalue of the matrix [ 4 1 -2 1 ] is __________. The largest eigenvalue of the matrix [4 1; -2 1] is 5. Step-by-Step Solution […]
GATE Biotechnology 2020 Previous Year Papers with Solutions
Gas Bubble Radius Mass Transfer
Q.No. 22 To facilitate mass transfer from a gas to a liquid phase, a gas bubble of radius r is introduced into the liquid. The gas bubble then breaks into […]
GATE Biotechnology 2020 Previous Year Papers with Solutions
Number of Nucleotide Molecules in 10 Picomoles
Q.No. 21 The number of molecules of a nucleotide of molecular weight 300 g/mol present in 10 picomoles is __________ x 1012 (round off to 2 decimal places). Number of […]
GATE Biotechnology 2020 Previous Year Papers with Solutions
Solubility in Immiscible Solvents Equilibrium Calculation
Q.20 Solvents A and B are completely immiscible. Solute S is soluble in both these solvents. 100 g of S was added to a container which has 2kg each of […]
![Q.19 The elemental composition of dry biomass of a yeast species is CH1.6O0.4N0.25O0.0024P0.017. The contribution of carbon to the dry biomass is _______ % (round off to 2 decimal places). [Given: atomic weights of H, C, N, O, P and S are 1, 12, 14, 16, 31 and 32 respectively]](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_19-11.png)
GATE Biotechnology 2020 Previous Year Papers with Solutions
Carbon Contribution in Yeast Dry Biomass
Q.19 The elemental composition of dry biomass of a yeast species is CH1.6O0.4N0.25O0.0024P0.017. The contribution of carbon to the dry biomass is _______ % (round off to 2 decimal places). […]
GATE Biotechnology 2020 Previous Year Papers with Solutions
∂Z/∂x for Z = x² + y² at X=1 Y=0
Q.18 Given that Z = x2 + y2, the value of ∂Z/∂x for X = 1 and Y = 0 is (answer is an integer). The partial derivative ∂Z/∂x for […]
GATE Biotechnology 2020 Previous Year Papers with Solutions
Continuous Function at x=1
Q.17 A function 𝒇 is as follows:𝒇(𝒙) = {𝟏𝟓 𝒊𝒇 𝒙
GATE Biotechnology 2020 Previous Year Papers with Solutions
Microorganism Diglycerol Tetraethers Polyisoprenoid Salt Lake
Q.16 A microorganism isolated from a salt–rich (salt concentration –2 M) lake was found to possess diglycerol tetraethers, withpolyisoprenoid alcohol side chains, as the major lipid component of its cell […]
