List of top Questions asked in IIT JAM BT- 2025

Applying the Hückel rule, the number of aromatic compounds among the following is _ _ _. (in integer)
The standard enthalpy of formation of methane (\(CH_4\)), using the standard enthalpy of reaction values from the following reaction steps, is \(-x\) kcal/mol. The value of \(x\) is _ _ _. (round off to one decimal place)
Consider that \(120\) cells of bacteria are inoculated in a nutrient rich media. If the doubling time of the bacteria is \(20\) minutes and assuming no cell death, the number of bacterial cells present after \(2\) hours will be _ _ _. (in integer)
A \(9.2\) kb plasmid DNA shown below has four BamHI sites \((p), (q), (r), (s)\). If a mutation results in the loss of BamHI site \((r)\), assuming the complete digestion by BamHI, the number of DNA fragments seen in agarose gel after electrophoresis will be _ _ _. (in integer)
If a weak acid \(HA\) is \(0.1\%\) ionized (dissociated) in a \(0.2M\) solution, its pH will be _ _ _. (round off to one decimal place)
During anaerobic glycolysis in muscle, each mole of glucose is converted into two moles of lactate, yielding two moles of ATP. Assume molar mass of glucose is \(180\ \text{g/mol}\). If \(1\ \text{kg}\) of glucose undergoes complete conversion to lactate, the number of moles of ATP produced is _ _ _. (round off to one decimal place)
Consider a spherical epithelial cell (C1) of diameter \(20\ \mu m\) and a cubic shaped liver cell (C2) of side \(20\ \mu m\). The ratio of the surface areas of C1 : C2 is _ _ _. (round off to two decimal places)
The number of distinct products formed after the nitration of tetralone in the presence of \(HNO_3\) and \(H_2SO_4\) is _ _ _. (in integer)
If the real diameter of an RBC is \(8\ \mu m\), then the magnification of its image given below is _ _ _. (in integer)
A particular animal population has \(4400\) individuals with annual per capita birth rate of \(0.035\) and the annual per capita death rate of \(0.02\). Net change in the population size in a year will be _ _ _. (in integer)
Consider an ATP synthase having twelve C-rings to sense proton motive force. The average number of protons required per ATP synthesis is _ _ _. (in integer)
The number of double bonds present in the isohypsic transformation product of allylic alcohol (Z) is _ _ _. (in integer)
A ball is thrown vertically upward with a speed of \(19.6\ \text{m/s}\). The value of acceleration due to gravity at that place is \(9.8\ \text{m/s}^2\). The maximum height (in cm) that the ball reaches is _ _ _. (in integer)
Assuming atomic mass number of \(C=12\), \(N=14\), \(O=16\), \(H=1\), the molecular mass (in Daltons) of a tripeptide made up of only glycine amino acids is _ _ _. (in integer)
A photon has energy of \(3.1\times10^{-19}\ \text{J}\). Its wavelength (in \(\AA\)) is _ _ _. (round off to one decimal place)
The value of
Consider that \(M\), \(L\), and \(T\) indicate mass, length and time, respectively. If \([ML^2T^{-n}]\) is the dimensional formula for the physical quantity Torque, then the value of \(n\) is _ _ _. (in integer)
In a geometric progression, the \(3^{rd}\) term is \(36\) and the \(5^{th}\) term is \(324\). The \(7^{th}\) term of the same progression will be _ _ _. (in integer)
Which of the following methods is/are used for local alignment of nucleotide sequences?
The volume of \(4M\) NaOH (in ml) required to make \(350\) ml solution of \(1.2M\) NaOH is _ _ _. (in integer)
The nucleotide sequence of one of the DNA strands is
If a light beam (solid arrow in the shown figure) is entering from Air medium to Glass medium (having refractive index of \(1.5\)), then while entering
In circular dichroism (CD) spectroscopy, the difference in molar extinction coefficients (\(\Delta \varepsilon\)) is plotted as a function of wavelength \(\lambda\) (in nm). In a CD spectrum of an alpha helical protein, \(\Delta \varepsilon\) will have a
In a protein, trypsin catalyzes the hydrolysis of peptide bonds with carbonyl group contributed by
Which of the following statements is/are true for sterilization?