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NEST (NISER) 2020 Session 2

Browse the complete Biology, Chemistry, Mathematics, and Physics question set from the NEST (NISER) 2020 Session 2 paper, question by question. Each question shows a quick preview so you can jump straight to the topic or subject you want to revise. Click through to attempt the full question in practice mode, or head back to the paper-wise list to download the entire paper as a PDF.

This paper has 60 questions in total - 1 easy (2%), 43 moderate (72%) and 16 tough (27%). That's a fairly typical mix for this exam. By subject: Biology 0% easy, 93% moderate, 7% tough; Chemistry 7% easy, 67% moderate, 27% tough; Mathematics 0% easy, 73% moderate, 27% tough; Physics 0% easy, 53% moderate, 47% tough.

Biology questions were spread across 10 chapters, with Biomolecules (B) (3), Microbes in Human Welfare (2), and Neural Control and Coordination (2) carrying the most weight. Chemistry questions were spread across 12 chapters, with Aldehydes and Ketones (2), Chemical Bonding and Molecular Structure (2), and Coordination Compounds (2) carrying the most weight. Mathematics questions were spread across 10 chapters, with Sequences and Series (3), Application of Derivatives (2), and Continuity and Differentiability (2) carrying the most weight. Physics questions were spread across 13 chapters, with Electrostatics (2), Thermodynamics (2), and Gravitation (1) carrying the most weight.

Biology

  1. 1A drug inhibits DNA replication in the bacterium . coli by specifically blocking the catalytic site of DNA polymerase activity. That the sam2020 (Session 2)Replication
  2. 2A polymerase chain reaction (PCR) for amplification of DNA fragments involves multiple cycles of thermal denaturation, annealing and extensi2020 (Session 2)Tools of Recombinant DNA Technology
  3. 3Conjugation in . coli is a microbial process wherein conjugative plasmids are transferred from one bacterium to another that does not posses2020 (Session 2)Products
  4. 4Endoplasmic reticulum is tubular, golgi apparatus is stacked flat cisternae, mitochondria are oval-shaped. However, lysosomes are spherical 2020 (Session 2)Cell Organelles
  5. 5A selenium-activated protein P catalyses a metabolic reaction that results in release of two ions. Expression of P is induced by lactose. In2020 (Session 2)Enzymes
  6. 6Graphical representation of action potential across the membrane of a neuron is shown below. The different stages of the action potential ar2020 (Session 2)Definition of Nerve Impulse
  7. 7Height of a plant is positively determined by the amount of final product, K, of a metabolic pathway catalyzed by five enzymes and (as depic2020 (Session 2)Enzymes
  8. 8Proteins in biological systems are polypeptides that are exclusively made from Lamino acids. A peptide, , with L-amino acids of a particular2020 (Session 2)Protein
  9. 9In order to understand immune responses to COVID-19 viral infection, a researcher took five individuals of an animal model of the disease. O2020 (Session 2)Acquired Immunity
  10. 10A crop variety was developed at a research station in Dehradun (located in a temperate zone) and this variety produces round ( , or ) or wri2020 (Session 2)Mendel’s Work and Results
  11. 11On an oceanic island, long isolated away from any continent, there are only four co-existing species: flowering shrub, rabbit, large deer an2020 (Session 2)Populations
  12. 12Antibiotics P1, P2 (cell wall synthesis inhibitors), and Q1, Q2 (protein synthesis inhibitors) are equally hydrophilic and moderately toxic 2020 (Session 2)Biocontrol Agents
  13. 13Choose the correct statement(s) from the following regarding light reactions taking place in the chloroplast. (i) The ion concentration of t2020 (Session 2)Mechanism of Photosynthesis
  14. 14Hydra has a receptor Q in certain cell/s that respond to a specific neurotransmitter P1, isolated from brains of higher mammals. An experime2020 (Session 2)Nerve
  15. 15Barbara McClintock observed non-Mendelian pigmentation patterns in maize (figure 1) mediated by transposons, as also observed in Petunia (fi2020 (Session 2)Mutation

Chemistry

  1. 1Among the complexes given below, the compound(s) that exhibit(s) optical isomerism is(are): (i) cis- ; (ii) trans- ; (iii) cis- ; (iv) trans2020 (Session 2)Isomerism of coordination compounds
  2. 2Consider a chemical reaction with the equilibrium constants and defined in terms of pressure and concentration respectively. Considering the2020 (Session 2)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  3. 3Consider the bonding and antibonding molecular orbitals of the molecule formed by the linear combination of the atomic orbitals and centered2020 (Session 2)Molecular Orbital Theory
  4. 4Consider one mole of a gas in a closed vessel fitted with a movable piston. At constant temperature ( ), the pressure of the gas is increase2020 (Session 2)Real Gases and Van der Waal's Equation
  5. 5The set of metal halides in which all the members form hydrates is:2020 (Session 2)General Characteristics of Alkali Metals
  6. 6The products and in the above reaction are:2020 (Session 2)Reactions of Ethers
  7. 7In nature, many electron transfer reactions take place which are catalyzed by enzymes. Two such half-cell reactions are The reduction potent2020 (Session 2)Cells and Electrode Potential, Nernst Equation
  8. 8The reactivity of an organometallic compound depends on the metal and the reactivity of the compound with which it is reacting. The compound2020 (Session 2)Method of preparation for Ketones
  9. 9Glyceraldehyde is an important intermediate in organic reactions. It can be prepared from readily available acrolein as given below. The cor2020 (Session 2)Chemical reactions for aldehydes and ketones
  10. 10The correct statement(s) pertaining to the following reactions is(are):2020 (Session 2)Preparation and Properties of Amines
  11. 11The correct order of ionic radius is:2020 (Session 2)Ionic bond
  12. 12The product in the above reaction sequence is2020 (Session 2)Preparation and Properties of Geminal and Vicinal Dihalides
  13. 13Carboxylic acids are known to form hydrogen bonded dimers of the type given below. The equilibrium constants ( ) of the dissociation of cert2020 (Session 2)Preparation and Properties of Carboxylic Acids
  14. 14The CFSE (in Dq) and the spin only magnetic moment of metal ions in an octahedral environment is plotted below as a function of number of el2020 (Session 2)Crystal Field Theory
  15. 15The pressure-volume diagrams for some processes involving 1 mole of an ideal gas are indicated below The process is isothermal and irreversi2020 (Session 2)Entropy and Second law of thermodynamics

Mathematics

  1. 1Consider the equations and The number of values of for which the above two equations intersect at exactly two points is2020 (Session 2)Monotonicity
  2. 2Let be a relation on given by Then is2020 (Session 2)Questions on Symmetric Transitive and Reflexive Properties
  3. 3Let be a randomly chosen integer from the set . The probability that the sum of the digits of is equal to 24 is2020 (Session 2)Combination
  4. 4Let be a nonsingular matrix with real entries. Suppose the determinant of is . Then is equal to2020 (Session 2)Adjoint and its Properties
  5. 5If the roots of the equation are real, positive, distinct and in geometric progression then2020 (Session 2)Geometric Progression
  6. 6If , then2020 (Session 2)Inequalities
  7. 7Let be a function defined by for . Then is2020 (Session 2)Types of Function (Mapping)
  8. 8The number of positive divisors of the number 79200 which are not divisible by 4 is2020 (Session 2)Selection of one or more item
  9. 9Let be a trapezium where and . Suppose the length of the sides AB and CD are 3 and 5 units respectively and the coordinate of B and C are an2020 (Session 2)Position of a point
  10. 10Let be defined by . Here, is the greatest integer function for and is the positive square root of for . Then2020 (Session 2)Continuity
  11. 11Let be a continuous function. For an , suppose that where . Then2020 (Session 2)Differentiability
  12. 12Let and be any three vectors. Then2020 (Session 2)Product of 2 vectors
  13. 13For a finite sequence of integers (where ), define2020 (Session 2)Arithmetic Progression
  14. 14Let be a differentiable function such that . Then2020 (Session 2)Mean Value Theorem
  15. 15Suppose are distinct integers chosen from . Let The value of for which takes maximum value is2020 (Session 2)Inequalities

Physics

  1. 1The potential for a point charge placed at a distance from a grounded infinite conducting plate is Here is a constant. The maximum value of 2020 (Session 2)Electric Flux and Gauss Law
  2. 2In a certain experiment, liquid helium at an initial temperature of 1 K is to be further cooled by bringing it into contact with a paramagne2020 (Session 2)First Law of Thermodynamics
  3. 3The remote control of a TV emits infra-red light of wavelength 900 nm . The TV detector is made of a semiconductor whose band gap is . The d2020 (Session 2)Energy Bands in Solids
  4. 4A radioactive dye of 4 grams is injected into the bloodstream of a patient. The half life of the dye is 6 hours. At the same time the dye is2020 (Session 2)Radioactivity
  5. 5A beam of laser light is incident on an analyzer which is rotated on a spectrometer stage. If the intensity of the transmitted light changes2020 (Session 2)Polarization of Light
  6. 6Assume that the mass density of the Sun is uniform and treat solar radiation as blackbody radiation. It's given that the surface temperature2020 (Session 2)Gravitational potential and Potential Energy
  7. 7A spherical raindrop of initial mass and initial radius falls freely from rest. Let be the constant density and the radius at time . Assume 2020 (Session 2)Newton's laws of motion
  8. 8Two different materials of equal dimensions (length and uniform cross-sectional area ) having thermal conductivities and respectively are co2020 (Session 2)Conduction
  9. 9Consider an optical medium where refractive index varies linearly with height i.e. where is a positive constant and is the height above the 2020 (Session 2)Refraction of light from plane surface
  10. 10An explosion releasing energy E occurs in a medium of density . This results in a spherical blast wave of radius . One can express the radiu2020 (Session 2)Dimensions
  11. 11A heat engine uses one mole of ideal gas as its working substance which performs the following cyclic process, as shown in the figure below.2020 (Session 2)First Law of Thermodynamics
  12. 12Thermal de Broglie wavelength is the de Broglie wavelength of the gas particles in an ideal gas at temperature with average kinetic energy g2020 (Session 2)Speed of Gas
  13. 13A disk shaped coin is tossed up in the air with 'Head' side on the top. The initial centre of mass velocity of the coin is in the vertical d2020 (Session 2)Rotational kinematics
  14. 14Two point charges and in vacuum are located at the points and in the xy plane. Assume that and . Select the correct statement(s).2020 (Session 2)Electric Charge and Coulomb's law
  15. 15A nonconducting sphere has mass 8.0 kg and radius 0.2 m . A flat compact coil of wire with 50 turns is wrapped tightly around it, with each 2020 (Session 2)Force and Torque on Current Carrying Conductor

Frequently Asked Questions

1.How many questions are in the NEST (NISER) 2020 Session 2 paper?

This paper has 60 questions in total - 15 each from Biology, Chemistry, Mathematics, and Physics.

2.Can I practise questions from just one subject?

Yes. Use the Biology, Chemistry, Mathematics, and Physics tabs at the top of the page to jump directly to that subject's question set within this paper.

3.Where can I find the Session 1 paper for the same year?

The NEST (NISER) 2020 Session 1 paper is listed separately - you can switch to it from the "NEST (NISER) Paper Wise PYQs" panel, under NEST (NISER) 2020.

4.What is the structure of the NEST (NISER) 2020 Session 2 paper?

The NEST (NISER) 2020 Session 2 paper on MARKS has 60 questions, organised by subject:

  • Biology: 15 questions - 10 single-correct and 5 multiple-correct.
  • Chemistry: 15 questions - 10 single-correct and 5 multiple-correct.
  • Mathematics: 15 questions - 10 single-correct and 5 multiple-correct.
  • Physics: 15 questions - 10 single-correct and 5 multiple-correct.
5.What is the difficulty level of the NEST (NISER) 2020 Session 2 paper?

Each question on MARKS carries a difficulty rating. Of the 60 rated questions in this paper, 1 (2%) are easy, 43 (72%) are medium and 16 (27%) are hard. Subject wise:

  • Biology: 0 easy, 14 medium, 1 hard
  • Chemistry: 1 easy, 10 medium, 4 hard
  • Mathematics: 0 easy, 11 medium, 4 hard
  • Physics: 0 easy, 8 medium, 7 hard
6.Which chapters had the most questions in the NEST (NISER) 2020 Session 2 paper?

The chapters with the most questions in each subject were:

  • Biology: Biomolecules (B) (3), Microbes in Human Welfare (2), and Neural Control and Coordination (2).
  • Chemistry: Aldehydes and Ketones (2), Chemical Bonding and Molecular Structure (2), and Coordination Compounds (2).
  • Mathematics: Sequences and Series (3), Application of Derivatives (2), and Continuity and Differentiability (2).
  • Physics: Electrostatics (2) and Thermodynamics (2).
7.Where can I find the solutions for the NEST (NISER) 2020 Session 2 paper?

Open any question on this page. Its page shows the correct answer and, where one is available, the worked solution. A downloadable PDF of the whole paper is coming soon.

8.How should I use the NEST (NISER) 2020 Session 2 paper to check my preparation?

Set a timer, attempt the 60 questions as you would in the exam, and only then open the answers. Note which subjects and chapters cost you the most marks, and revise those first using the chapter-wise practice for NEST (NISER). Repeating this with other papers shows whether the same weak spots keep coming back.

9.Will the NEST (NISER) 2020 Session 2 paper help me prepare for NEST (NISER) 2027?

Yes. Every past paper shows the question styles and topics NEST (NISER) has asked before, and a solved paper gives you a realistic benchmark for speed and accuracy. Use it along with the other papers to spot the chapters that keep returning.