List of top Questions asked in IISER

What is the value of $E^\circ(\text{Fe}^{3+}/\text{Fe}^0)$?
(The standard reduction potential values are $E^\circ(\text{Fe}^{3+}/\text{Fe}^{2+}) = 0.77\text{ V}$, and $E^\circ(\text{Fe}^{2+}/\text{Fe}^0) = -0.44\text{ V}$)}
What are the correct orders of stability for the following compounds?
Honey bee males are haploid and females are diploid. Which one of the following statements is INCORRECT about honey bees?
What are retroviruses?
The given picture was obtained from an agarose gel electrophoresis of a plasmid after digestion with restriction enzymes either X, Y or both X and Y.
Which one of the following diagrams correctly represents the position of the restriction enzyme sites (X, Y) on the 10,000 bp plasmid?
Which one of the following statements best describes the acidic/basic/amphoteric nature of ZnO and CaO?
Which among the following processes is/are associated with increasing bond order but no change in diamagnetic/paramagnetic behaviour?
(i) $\text{N}_2 \rightarrow \text{N}_2^+ + \text{e}^-$
(ii) $\text{O}_2 \rightarrow \text{O}_2^+ + \text{e}^-$
(iii) $\text{O}_2 + \text{e}^- \rightarrow \text{O}_2^-$
Which one of the following statements is FALSE?
Which one of the following organisms produces the female gamete by mitosis of haploid cells?
Which one of the following autoregulatory mechanisms is employed by the kidney when glomerular filtration rate is reduced?
Two double heterozygous plants (PpQq), derived from two different pairs of true-breeding parents of unknown genotype, produce gametes in the proportions as given below.
Which one of the following options correctly represents the genotype of the parents?
Which one of the following statements is correct?
Which one of the following conditions will favour maximum dissociation of oxygen from the oxyhaemoglobin in the tissues?
Which amino acid will be charged on the tRNA with anticodon 5Õ-GUU-3Õ?
Which one of the following options describes a triglyceride?
Which one of the following statements about a plant carotenoid is FALSE?
Match the entries in column I and column II.
Which one of the following combinations is correct?
A cell suspension of actively respiring mitochondria is treated with either chemical X (experiment 1) or chemical Y (experiment 2), or left untreated (experiment 3).
Chemical X selectively inhibits electron transport from Complex I to ubiquinone, while chemical Y selectively inhibits electron transport from Complex III to cytochrome C.
Which one of the following options represents the correct order of relative number of ATP synthesised in mitochondria?
Chromosomes are classified as metacentric, sub-metacentric, acrocentric and telocentric. This classification is based on the position of which one of the following structures?
Atomic masses of two oxygen isotopes \(^{16}_{8}\text{O}\) and \(^{18}_{8}\text{O}\) are \(15.99491\ \text{u}\) and \(17.99916\ \text{u}\), respectively, where \(\text{u}\) is the atomic mass unit. Masses of proton and neutron are given by \(1.00727\ \text{u}\) and \(1.00866\ \text{u}\), respectively. The speed of light is \(c\). What is the difference between the binding energies of \(^{18}_{8}\text{O}\) and \(^{16}_{8}\text{O}\) nuclei in units of \(\text{u } c^2\)?
Two monochromatic sources emit light at wavelengths \(\lambda\) and \(\lambda/2\). The stopping potentials for a photosensitive material using these two sources are found to be \(1\ \text{V}\) and \(3\ \text{V}\), respectively. What is the work function of the material?
Consider the circuit diagram as shown in the figure. The source has a voltage \(V = V_0 \sin \omega t\). Both the resistors A and B have the same resistance. The capacitor and the inductor have capacitance \(C\) and inductance \(L\), respectively. For some frequency \(\omega\), and certain initial charge in the capacitor, the current through the resistor A is in phase with the source. What is the value of \(\omega\)?
Consider the circuit shown in the figure. The capacitors C1 and C2 have capacitances \(2\ \mu\text{F}\) and \(8\ \mu\text{F}\), respectively. The switch can connect point X to either Y or Z. Initially XY is connected until the capacitor is fully charged by the battery. Then the switch connects X and Z, and the final charges on C1 and C2 are \(Q_1\) and \(Q_2\), respectively. What is the value of the ratio \(\frac{Q_2}{Q_1 + Q_2}\)?
A conducting wire carrying a steady current \(I\) is shaped as shown in the figure below. All connected straight segments meet at right angles. What is the magnetic moment of the current loop?
The refractive indices (\(n\)) of two transparent slabs are \(2\) and \(2/\sqrt{3}\). They are attached together and placed in a third transparent medium of refractive index \(\sqrt{2}\), as shown in the figure. The thickness of the upper slab is \(1\ \text{cm}\). A monochromatic light ray is incident on the upper slab at \(45^\circ\). What would be the thickness in \(\text{cm}\) of the lower slab such that the lateral shift of the ray after passing through both the slabs is zero?