NEET 2021
Paper was held on
Sun, Sep 12, 2021 4:30 AM
Biology
Which of the following is an incorrect statement?
View Question The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during polli
View Question The factor that leads to Founder effect in a population is :
View Question The production of gametes by the parents, formation of zygotes, the F1 and F2 plants, can be understood from a diagram c
View Question Diadelphous stamens are found in
View Question Gemmae are present in
View Question A typical angiosperm embryo sac at maturity is :
View Question Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survi
View Question During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out :
View Question DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as
View Question Which of the following algae produce Carrageen?
View Question Plants follow different pathways in response to environment of phases of life to form different kinds of structures. Thi
View Question The site of perception of light in plants during photoperiodism is
View Question The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is refe
View Question Match List-I with List-II.
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View Question Which of the following stages of meiosis involves division of centromere?
View Question The first stable product of CO2 fixation in Sorghum is
View Question Which of the following statements is not correct?
View Question Which of the following algae contains mannitol as reverse food material?
View Question When gene targetting involving gene amplification is attempted in an individual's tissue to treat disease, it is known a
View Question Match List-I with List-II.
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View Question Match List-I with List-II .
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View Question Complete the flow chart on central dogma.
View Question In the equation GPP - R = NPPR represents :
View Question When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as :
View Question The plant hormone used to destroy weeds in a field
View Question Which of the following are not secondary metabolites in plants?
View Question Amensalism can be represented as :
View Question Which of the following is not an application of PCR (Polymerase Chain Reaction)?
View Question Which of the following is a correct sequence of steps in a PCR (Polymerase Chain Reaction)?
View Question Match List-I with List-II.
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View Question Which of the following statements is correct?
View Question In the exponential growth equation Nt = N0ert, e represents
View Question In some members of which of the following pairs of families, pollen grains retain their viability for months after relea
View Question Match List-I with List-II.
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View Question Match List-I with List-II.
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View Question Match Column-I with Column-II Select the correct answer from the options given below.
View Question What is the role of RNA polymerase III in the process of transcription in eukaryotes?
View Question Which of the following statements is incorrect?
View Question Now-a-days it is possible to detect the mutated gene causing cancer by allowing radioactive probe to hybridise its compl
View Question DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as
View Question Which of the following statements is incorrect?
View Question Plasmid pBR322 has Pst I restriction enzyme site within gene ampR that confers ampicillin resistance. If this enzyme is
View Question Identify the correct statement.
View Question Select the correct pair.
View Question Match List-I with List-II
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View Question Receptors for sperm binding in mammals are present on :
View Question The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G1 phase
View Question Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.
View Question Match the following :
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View Question Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature?
View Question If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?
View Question The partial pressures (in mm Hg) of oxygen (O2) and carbon dioxide (CO2) at alveoli (the site of diffusion) are :
View Question Read the following statements(1) Metagenesis is observed in Helminths.(2) Echinoderms are triploblastic and coelomate an
View Question In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny wil
View Question Which of the following statements wrongly represents the nature of smooth muscle?
View Question Which one of the following belongs to the family Muscidae?
View Question During the process of gene amplification using PCR, if very high temperature is not maintained in the beginning, then wh
View Question Match List-I with List-II.
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View Question Which one of the following is an example of Hormone releasing IUD?
View Question The centriole undergoes duplication during :
View Question Which of the following characteristics is incorrect with respect to cockroach?
View Question Veneral diseases can spread through :(1) Using sterile needles(2) Transfusion of blood from infected person(3) Infector
View Question Which one of the following organisms bears hollow and pneumatic long bones?
View Question Persons with 'AB' blood group are called as "Universal recipients". This is due to :
View Question The organelles that are included in the endomembrane system are
View Question A specific recognition sequence identified by endonucleases to make cuts at specific positions within the DNA is :
View Question Identify the incorrect pair
View Question With regard to insulin choose correct options.(1) C-peptide is not present in mature insulin.(2) The insulin produced by
View Question Chronic auto immune disorder affecting neuro muscular junction leading to fatigue, weakening and paralysis of skeletal m
View Question Which of the following RNAs is not required for the synthesis of protein?
View Question Erythropoietin hormone which stimulates R.B.C formation is produced by :
View Question Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins?
View Question For effective treatment of the disease, early diagnosis and understanding its pathophysiology is very important. Which o
View Question Which is the "Only enzyme" that has "Capability" to catalyse Initiation, Elongation and Termination in the process of tr
View Question Match List-I with List-II.
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View Question Match List-I with List-II
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View Question Following are the statements with reference to 'lipids'.(1) Lipids having only single bonds are called unsaturated fatty
View Question Match List-I with List-II
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View Question During muscular contraction which of the following events occur?(1) 'H' zone disappears(2) 'A' band widens(3) 'I' band r
View Question Match List-I with List-II.
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View Question Assertion (A) : A person goes to high altitude and experiences 'altitude sickness' with symptoms like breathing difficul
View Question Which of these is not an important component of initiation of parturition in humans?
View Question Which of the following secretes the hormone, relaxin, during the later phase of pregnancy?
View Question Match List-I with List-II
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View Question The Adenosine deaminase deficiency results into
View Question Which one of the following statements about histones is wrong?
View Question Statement I : The codon 'AUG' codes for methionine and phenylalanine.Statement II : 'AAA' and 'AAG' both codons code for
View Question Identify the types of cell junctions that help to stop the leakage of the substances across a tissue and facilitation of
View Question Following are the statements about prostomium of earthworm.(1) It serves as a covering for mouth.(2) It helps to open cr
View Question Chemistry
The incorrect statement among the following is :
View Question Given below are two statements :Statement I :Aspirin and Paracetamol belong to the class of narcotic analgesics.Statemen
View Question Statement I : Acid strength increases in the order given as HF << HCl << HBr << HI.Statement II : As t
View Question Which one among the following is the correct option for right relationship between CP and CV for one mole of ideal gas?
View Question BF3 is planar and electron deficient compound. Hybridization and number of elements around the central atom, respectivel
View Question The major product of the following chemical reaction is :
View Question The molar conductance of NaCl, HCl and CH3COONa at infinite dilution are 126.45, 426.16 and 91.0 S cm2 mol$$-$$1 respect
View Question A particular station of All India Radio, New Delhi broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of
View Question Which of the following reactions is the metal displacement reaction? Choose the right option.
View Question The compound which shows metamerism is :
View Question Match List - I with List - II :
List - I
List - II
(a)
$$PC{l_5}$$
(i)
Squ
View Question Identify the compound that will react with Hinsberg's reagent to give a solid which dissolves in alkali.
View Question Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of :
View Question Ethylene diaminetetraacetate (EDTA) ion is :
View Question The major product formed in dehydrohalogenation reaction of 2-Bromo pentane is Pent-2-ene. This product formation is bas
View Question An organic compound contains 78% (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirica
View Question The pKb of dimethyl amine and pKa of acetic acid are 3.27 and 4.77 respectively at T (K). The correct option for the pH
View Question The correct structure of 2, 6-dimethyl-dec-4-ene is
View Question The following solutions were prepared by dissolving 10 g of glucose (C6H12O6) in 250 ml of water (P1), 10 g of urea (CH4
View Question The correct sequence of bond enthalpy of 'C-X' bond is :
View Question Dihedral angle of least stable conformer of ethane is :
View Question Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.
View Question What is the IUPAC name of the organic compound formed in the following chemical reaction?
View Question For a reaction, A $$\to$$ B, enthalpy of reaction is $$-$$4.2 kJ mol$$-$$1 and enthalpy of activation is 9.6 kJ mol$$-$$
View Question Consider the above reaction and identify the missing reagent/chemical.
View Question The correct option for the value of vapour pressure of a solution at 45$$^\circ$$C with benzene to octane in molar ratio
View Question Match List-I with List-II Choose the correct answer from the options given below.
View Question The intermediate compound 'X' in the following chemical reaction is :
View Question The product formed in the following chemical reaction is :
View Question The slope of Arrhenius plot $$\left( {\ln \,k\,v/s{1 \over T}} \right)$$ of first order reactino is $$-$$5 $$\times$$ 10
View Question For irreversible expansion of an ideal gas under isothermal condition, the correct option is :
View Question From the following pairs of ions which one is not an iso-electronic pair?
View Question The molar conductivity of 0.007 M acetic acid is 20 S cm2 mol$$-$$1. What is the dissociation constant of acetic acid? C
View Question Which of the following molecules is non-polar in nature?
View Question Match List-I with List-II :
List-I
List-II
(a)
$${[Fe{(CN)_6}]^{3 - }}$$
(i)
View Question In which one of the following arrangements the given sequence is not strictly according to the properties indicted again
View Question Physics
The E and G respectively denote energy and gravitational constant, then $${E \over G}$$ has the dimensions of :
View Question An inductor of inductance L, a capacitor of capacitance C and a resistor of resistance 'R' are connected in series to an
View Question A body is executing simple harmonic motion with frequency 'n', the frequency of its potential energy is :
View Question A thick current carrying cable of radius 'R' carries current 'I' uniformly distributed across its cross section. The var
View Question A nucleus with mass number 240 breaks into two fragments each of mass number 120, the binding per nucleon of unfragmente
View Question A parallel plate capacitor has a uniform electric field $$\overrightarrow E $$ in the space between the plates. If the d
View Question The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600nm, when it
View Question Polar molecules are the molecules :
View Question A capacitor of capacitance 'C', is connected across an ac source of voltage V, given by V = V0sin$$\omega$$tThe displace
View Question A screw gauge gives the following readings when used to measure the diameter of a wire Main scale reading : 0 mmCircular
View Question Find the value of the angle of emergence from the prism. Refractive index of the glass is $$\sqrt 3 $$
View Question In a potentiometer circuit a cell of EMF 1.5 V gives balance point at 36 cm length of wire. If another cell of EMF 2.5 V
View Question A particle is released from height S from the surface of the Earth. At a certain height its kinetic energy is three time
View Question The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-secti
View Question Water falls from a height of 60m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are 10%
View Question An infinitely long straight conductor carries a current of 5A as shown. An electron is moving with a speed of 105 m/s pa
View Question Consider the following statements (A) and (B) and identify the correct answer.(A) A Zener diode is connected in reverse
View Question A spring is stretched by 5 cm by a force 10 N. The time period of the oscillations when a mass of 2 kg is suspended by i
View Question The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An ex
View Question A dipole is placed in an electric field as shown. In which direction will it move?
View Question A convex lens 'A' of focal length 20 cm and a concave lens 'B' of focal length 5 cm are kept along the same axis with a
View Question The escape velocity from the Earth's surface is v. The escape velocity from the surface of another planet having a radiu
View Question An electromagnetic wave of wavelength '$$\lambda$$' is incident on a photosensitive surface of negligible work function.
View Question A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since :
View Question Two charged spherical conductors of radius R1 and R2 are connected by a wire. Then the ratio of surface charge densities
View Question For a plane electromagnetic wave propagating in x-direction, which one of the following combination gives the correct po
View Question A cup of coffee cools from 90$$^\circ$$C to 80$$^\circ$$C in t minutes, when the room temperature is 20$$^\circ$$C. The
View Question The equivalent capacitance of the combination shown in the figure is :
View Question If force [F], acceleration [A] and time [T] are chosen as the fundamental physical quantities. Find the dimensions of en
View Question A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled
View Question The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerin becomes constant
View Question Column - I gives certain physical terms associated with flow of current through a metallic conductor. Column-II gives so
View Question Match Column - I and Column - II and choose the correct match from the given choices.
Column - I
C
View Question In the product$$\overrightarrow F = q\left( {\overrightarrow v \times \overrightarrow B } \right)$$$$ = q\overrightarr
View Question From a circular ring of mass 'M' and radius 'R' an arc corresponding to a 90$$^\circ$$ sector is removed. The moment of
View Question Three resistors having resistances r1, r2 and r3 are connected as shown in the given circuit. The ratio $${{{i_3}} \over
View Question A ball of mass 0.15 kg is dropped from a height 10m, strikes the ground and rebounds to the same height. The magnitude o
View Question A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V, 44W lamp. Ignoring power lo
View Question A uniform conducting wire of length 12a and resistance 'R' is wound up as a current carrying coil in the shape of ,(i) a
View Question A particle of mass 'm' is projected with a velocity $$\upsilon $$ = kVe = (k < 1) from the surface of the earth. (Ve
View Question A series LCR circuit containing 5.0 H inductor, 80$$\mu$$F capacitor and 40$$\Omega$$ resistor is connected to 230V vari
View Question A particle moving in a circle of radius R with a uniform speed takes a time T to complete one revolution. If this partic
View Question Two conducting circular loops of radii R1 and R2 are placed in the same plane with their centres coinciding. If R1 >&
View Question Twenty seven drops of same size are charged at 220V each. They combine to form a bigger drop. Calculate the potential of
View Question A uniform rod of length 200 cm and mass 500 g is balanced on a wedge placed at 40 cm mark. A mass of 2 kg is suspended f
View Question A point object is placed at a distance of 60 cm from a convex lens of focal length 30 cm. If a plane mirror were put per
View Question A car starts from rest and accelerates at 5m/s2. At t = 4 s, a ball is dropped out of a window by a person sitting in th
View Question For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the output at th
View Question