GATE 2025 BT – Previous Year Questions with Solutions
All 65 questions of GATE 2025 BT with answers and explanations. Read each question, then practise it by topic or as a full paper.
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- Question 1 – Is there any good show television tonight? Select the most appropriate option to complete the above sentence.
- Question 2 – As the police officer was found guilty of embezzlement, he was dismissed from the service in accordance with the Service Rules. Select the most…
- Question 3 – The sum of the following infinite series is: 11! + 12! + 13! + 14! + 15! +
- Question 4 – A thin wire is used to construct all the edges of a cube of 1 m side by bending, cutting and soldering the wire. If the wire is 12 m long, what is the…
- Question 5 – The figures I, II and III are parts of a sequence. Which one of the following options comes next in the sequence at IV?
- Question 6 – "Why do they pull down and do away with crooked streets, I wonder, which are my delight, and hurt no man living? Every day the wealthier nations are…
- Question 7 – Rohit goes to a restaurant for lunch at about 1 PM. When he enters the restaurant, he notices that the hour and minute hands on the wall clock are…
- Question 8 – A color model is shown in the figure with color codes: Yellow (Y), Magenta (M), Cyan (Cy), Red (R), Blue (Bl), Green (G), and Black (K). Which one of…
- Question 9 – A circle with center at (x, y) = (0.5, 0) and radius = 0.5 intersects with another circle with center at (x, y) = (1, 1) and radius = 1 at two points.…
- Question 10 – An object is said to have an n-fold rotational symmetry if the object, rotated by an angle of 2n, is identical to the original. Which one of the…
- Question 11 – Koch's postulate was established by Robert Koch while working on a disease caused by
- Question 12 – Corynebacterium diphtheriae causes diphtheria in humans, only when this bacterium is infected by
- Question 13 – Let y(t) be a bacterial population whose growth is given by dydt = (y + 2) where is the growth rate constant. If y(0) = 1 and y(1) = 4, then the value…
- Question 14 – The minimum value of the function f(x) = x + 4x for x > 0 is
- Question 15 – The diversity in T-cell receptors is generated by
- Question 16 – Which one of the following is true for piRNAs?
- Question 17 – Which one of the following coenzymes is utilised by alanine racemase for the conversion of L-Alanine to D-Alanine?
- Question 18 – Correctly match the following Monosaccharides with their respective Epimers. Monosaccharide Epimer --- --- P. D-mannose 1. C-3 epimer of D-glucose Q.…
- Question 19 – Correctly match the following Product classes with their representative Products. Product class Product --- --- P. Biofuel 1. Cellulase Q. Bioplastic…
- Question 20 – Which one of the following hosts is used in mammalian cell culture for the production of glycosylated recombinant therapeutic proteins?
- Question 21 – Which of the following features is/are used to distinguish Archaea from Bacteria?
- Question 22 – Which of the following enzymes is/are involved in the biogenesis of miRNA?
- Question 23 – Which of the following separation processes is/are based on molecular size?
- Question 24 – Which of the following show(s) optical activity at 100 mM concentration in water?
- Question 25 – Which of the following fluids exhibit(s) non-Newtonian behaviour at 25 oC?
- Question 26 – Which of the following compounds have the same degree of reduction per carbon-mole?
- Question 27 – A recombinant protein is secreted extracellularly in soluble form by an E. coli culture. Which of the following downstream processes is/are involved…
- Question 28 – If the doubling time of a bacterial population is 3 hours, then its average specific growth rate during this period is h-1. (Round off to two decimal…
- Question 29 – For a mechanically reversible isobaric process taking place in a closed system involving 5 moles of an ideal gas, the temperature increases from an…
- Question 30 – The allele associated with albinism in humans is recessive (c). The probability that an albino male (cc) and a carrier female (Cc) will have an…
- Question 31 – The contour length of a B-DNA molecule that encodes a bacterial protein of 33 kDa is nm. Consider the average molecular weight of an amino acid as 110…
- Question 32 – Within the Michaelis-Menten framework, the ratio of v 0/V max when [S] = 20 K m is . (Round off to two decimal places)
- Question 33 – Consider a nonlinear algebraic equation, ex - 2 = 0. Using the Newton-Raphson method, with the initial guess of x 0 = 1, the approximated value of the…
- Question 34 – The value of k, for which the linear equations 2x + 3y = 6 and 4x + 6y = 3k have at least one solution, is . (Answer in integer)
- Question 35 – Two fair six-sided dice, with sides numbered 1 to 6, are thrown once. The probability of getting 7 as the sum of the numbers on the top side of the…
- Question 36 – Correctly match the Microorganisms with their respective Nutrition and energy requirement. Microorganisms Nutrition and energy requirement --- --- P.…
- Question 37 – Correctly match the Inhibitor with its respective Function in mitochondrial respiration. Inhibitor Function --- --- P. FCCP 1. Inhibits cytochrome c…
- Question 38 – An octapeptide composed of these L-amino acids – Lys, Thr, Ser, Met, Arg, Trp, Tyr, Glu – was subjected to analyses with the following outcomes: P.…
- Question 39 – Correctly match the type of Hypersensitivity reaction with its respective Example. Hypersensitivity reaction Example --- --- P. Type I 1. Tuberculin…
- Question 40 – Correctly match the Enzyme with its respective Function. Enzyme Function --- --- P. Gyrase 1. Removes a damaged base by cleaving the bond between…
- Question 41 – Correctly match the Coenzyme with its respective involvement in a specific Reaction type. Coenzyme Reaction type --- --- P. Thiamine pyrophosphate 1.…
- Question 42 – A thermometer measuring body temperature follows a first-order response with a time constant of 40 seconds. The instrument will reach 95% of its…
- Question 43 – The output y(t) of a first-order process is governed by the following differential equation pdydt + y = K pf(t) where p is a non-zero time constant, K…
- Question 44 – For a specific bioreactor configuration, the power requirement for a Rushton-turbine impeller agitating an unaerated Newtonian fluid in the turbulent…
- Question 45 – Let m and n be fixed real numbers. If the function y(t) = C 1et + C 2e-t is a solution of d2ydt2 + mdydt + ny = 0 for any constants C 1 and C 2, then…
- Question 46 – If the function f(x) = cases 2x, & x > 0 \\ a + bx, & x 0cases where a and b are constants, is differentiable at x = 0, then a + b is equal to
- Question 47 – Correctly match the following Bioinformatic tool/Database with its respective Utility. Bioinformatic tool/Database Utility --- --- P. BLAST 1.…
- Question 48 – Correctly match the herbicide with its mode of development of resistance in plants. Herbicide Mode of development of resistance --- --- P.…
- Question 49 – Which of the following statements is/are true regarding the effect of the concentration of metabolic intermediates on glycolysis in erythrocytes?
- Question 50 – Which of the following statements about initiation of DNA replication in eukaryotes is/are true?
- Question 51 – Which of the following proteins is/are involved in intraflagellar transport?
- Question 52 – Which of the following statements is/are true about telomerase?
- Question 53 – The blood group of the mother is A+ and that of the father is AB+. Which of the following statements is/are correct?
- Question 54 – An enzyme immobilised in a porous spherical pellet, catalyses a strongly mass-transfer limited first-order reaction. The effectiveness factor for the…
- Question 55 – Which of the following methods is/are used for identifying histone modifications?
- Question 56 – Which of the following amino acids contain(s) two chiral carbons?
- Question 57 – A binary mixture of benzene and toluene under vapour-liquid equilibrium at 80 oC follows ideal Raoult's law. At this condition, the saturation…
- Question 58 – In a fermentation process, each mole of glucose is converted to biomass (CH 1.8O 0.5N 0.2), with a biomass yield coefficient of 0.4 C-mol/C-mol,…
- Question 59 – Let a 0 = 0 and define a n = 12(1 + a n-1) for all positive integers n 1. The least value of n for which 1 - a n < 1210 is . (Answer in integer)
- Question 60 – The percentage of light that would pass through a sample with an absorbance of 2 would be %. (Round off to the nearest integer)
- Question 61 – A hot, freshly-sterilised fermentation medium is cooled in a double-pipe heat-exchanger. The medium enters the inner pipe of the exchanger at 95 oC…
- Question 62 – A 2 L bioreactor is being operated as a chemostat, at a flow rate of 0.8 L/h and sterile feed of 10 g/L substrate. The bacterial growth follows Monod…
- Question 63 – Let A = pmatrix1 & 0 & 1\\0 & k & 0\\3 & 0 & -1pmatrix. If the eigenvalues of A are -2, 1, and 2, then the value of k is . (Answer in integer)
- Question 64 – An NMR spectrometer operating at proton resonance frequency () of 1 GHz will have a magnetic field strength of Tesla (T). The gyromagnetic ratio for…
- Question 65 – For the coupled reactions given below Glucose 6-phosphate + H 2O Glucose + P i (Reaction 1) ATP + Glucose ADP + Glucose 6-phosphate (Reaction 2) the…