datavorous/entrance-exam-dataset huggingface dataset:
An analysis of several generations of a family, which is used on human beings and domesticated animals is called ___.

Options:
A Domestic analysis
B Human analysis
C International analysis
D Pedigree analysis

The correct answer is:
Pedigree analysis

Solution:
An analysis of several generations of a family, which is used on human beings and domesticated animals is called pedigree analysis

Topic: Biology, Principles of Inheritance and Variation, NEET
An AND gate is followed by a NOT gate. With two inputs A and B, the boolean expression for the output Y will be

Options:
A A⋅B
B A+B
C A+B¯
D A  . B¯

The correct answer is:
A  . B¯

Solution:
On the basis of boolean algebra AND gate is followed by NOT gate become output of Y=A.B

Topic: Physics, Semiconductors, NEET
An angiosperm male plant having 24 chromosomes in its pollen mother cell is crossed with a female plant bearing 24 chromosomes in its root cells. The number of chromosomes in embryo and endosperm formed from this cross will most like be

Options:
A 24 and 48
B 24 and 24
C 48 and 72
D 24 and 36

The correct answer is:
24 and 36

Solution:
Pollen mother cell is diploid. Thus in the male plant 2n = 24. The male gamete will be haploid with n = 12. The root cell is diploid. Thus in the female plant 2n = 24. The egg will be haploid with n = 12. The endosperm is triploid 3n = 36 while the embryo will be 2n = 24.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
An angiosperm plant is having 24 chromosomes in its leaf cells. The number of chromosomes present in synergid, pollen grain, nucellus & endosperm will be respectively:

Options:
A 12, 12, 12, 72
B 8, 8, 12, 36
C 12, 12, 24, 36
D 12, 12, 12, 36

The correct answer is:
12, 12, 24, 36

Solution:
Synergid - Haploid cell of the embryo sac
Pollen grain- Haploid cell of male gametophyte
Nucellus- Diploid cell of female sporophyte
Endosperm- Cell of the product of triple fusion

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
An anhydride and an ester can be distinguished with

Options:
A C2H5OH
B NH3
C water
D aqueous NaOH

The correct answer is:
water

Solution:
If an anhydride is warmed in water, it hydrolyses readily to RCOOH, which turns blue litmus to red. Under these conditions, an ester is not hydrolyzed in water.

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
An animal cell was grown in a culture medium containing P32 nucleotides, the parts from which DNA is built. Later examination of the cell showed the radioactivity to be concentrated in the

Options:
A Golgi body
B nucleus
C rough ER
D smooth ER

The correct answer is:
nucleus

Solution:
DNA is a polymer of deoxyribonucleotide that is found in chromosomes, mitochondria, and chloroplast. It carries genetic information. DNA is composed of nucleotides so radiolabeled nucleotides are used for the synthesis of DNA during replication. But in plant cells, the DNA is present in the nucleus so when plant cells are examined these radioactive nucleotides are found inside the nucleus.

Topic: Biology, Molecular Basis of Inheritance, NEET
An animal is hiding itself in the background surrounding. This phenomenon is

Options:
A Camouflage
B Mutation
C Altruism
D Mutualism

The correct answer is:
Camouflage

Solution:
The phenomenon of blending with their surrounding is known as Camouflage.
Altruism - It is putting own life at stake for the benefit of others.
Mutualism - Interaction in which both species are mutually benefitted and separation is very difficult.
Mutation: Sudden change in the hereditary molecule.

Topic: Biology, Organisms and Populations, NEET
An animal species has 40 chromosomes in its somatic cells. The number of chromosomes present in the somatic cells of a monosomic individual of the same species is

Options:
A 20
B 40
C 39
D 19

The correct answer is:
39

Solution:
Monosomy is a type of aneuploidy in which an organism doesn't have one chromosome. It is denoted by the chromosome number 2n -1. Thus, the organism of this species with monosomy will have 39 chromosomes.

Topic: Biology, Principles of Inheritance and Variation, NEET
An anisotropic material has a coefficient of linear expansion Î±,2Î± and 3Î± along the three co-ordinate axis. Coefficient of cubical expansion of material will be equal to

Options:
A 2Î±
B 63α
C 6Î±
D None of these

The correct answer is:
6α

Solution:
For anisotropic material
Coefficient of cubical expansion
γ=α+2α+3α=6α

Topic: Physics, Thermal Properties of Matter, NEET
An anther has 1200 pollen grains. How many pollen mother cells (pmc) must have been there to produce them?

Options:
A 300
B 350
C 200
D 250

The correct answer is:
300

Solution:
4 pollen grains are produced by 1 pmc 1200 pollen grains are produced by = 1200/4 = 300 pmc

Topic: Biology, Cell Cycle and Cell Division, NEET
An antibiotic resistance gene in a vector usually helps in the selection of:

Options:
A Competent bacterial cells
B Transformed bacterial cells
C Recombinant bacterial cells
D None of the above

The correct answer is:
Transformed bacterial cells

Solution:
An antibiotic resistance gene in a vector usually helps in the selection of transformed cells as they cells do not die in the presence of the antibiotic.

Topic: Biology, Biotechnology - Principles and Processes, NEET
An antibiotic resistance gene in a vector usually helps in the selection of

Options:
A competent cells
B transformed cells
C cloning vector
D ligase enzyme

The correct answer is:
transformed cells

Solution:
Antibiotic resistance gene in a vector usually helps in the selection of transformed cells. Transformation is a procedure in which a piece of DNA is introduced into a host bacterium. The genes which encode resistance to antibiotics like ampicillin and tetracycline, are considered to be selectable markers for E.coli.

Topic: Biology, Biotechnology - Principles and Processes, NEET
An antibody contains light and heavy chains interconnected by disulphide bonds. These disulphide bonds can be formed between

Options:
A serine, threonine
B methionine, cysteine
C methionine, methionine
D cysteine, cysteine

The correct answer is:
cysteine, cysteine

Solution:
Cysteine is a non-essential sulphur-containing non polar and hydrophobic amino acid. Disulfide bonds/bridges (S-S bonds) are covalent bonds formed by the oxidation of two thiol (sulphur) groups within cysteine residues which stabilizes the tertiary structure of proteins. Methionine being one of the most hydrophobic amino acid is usually found in the interior of the protein. Cysteine on other hand ionize to form thiolate anion, hence it forms S-S bonds.

Topic: Biology, Human Health and Diseases, NEET
An antibody molecule is represented as H2L2 . This implies that

Options:
A each antibody has four antigen-binding sites.
B each antibody molecule has four peptide chains, two small called light chains and two longer called heavy chains.
C there are 2 interchain disulphide bonds.
D there are 2 intrachain disulphide bonds.

The correct answer is:
each antibody molecule has four peptide chains, two small called light chains and two longer called heavy chains.

Solution:
Antibodies are protective proteins called immunoglobulins, which are produced by the immune system to attack the foreign substance called an antigen. The structure of antibodies comprises of four polypeptides of which two are heavy chains (identical) and two are light chains(identical). Hence it is represented by H2L2 . These chains form a Y shaped molecule

Topic: Biology, Human Health and Diseases, NEET
An antibody present in colostrum is

Options:
A IgG
B IgA
C IgM
D IgD

The correct answer is:
IgA

Solution:
The mammary glands of the female undergo differentiation during pregnancy and starts producing milk towards the end of pregnancy by the process called lactation. This helps the mother in feeding the newborn. The milk produced during the initial few days of lactation is called colostrum which contains several antibodies (IgA) absolutely essential to develop resistance for the new-born babies.

Topic: Biology, Human Reproduction, NEET
An antifreeze solution is prepared from 222.6 g of ethylene glycol (C2H6O2) and 200 g of water. Calculate the molality of the solution.

Options:
A 17.95 m
B 24.56 m
C 75.24 m
D 46.28 m

The correct answer is:
17.95 m

Solution:
Correct Option is : (A)
17.95 m

Topic: Chemistry, Solutions, NEET
An antifreeze solution is prepared from 222.6 g of ethylene glycol (C2H6O2) and 200 g of water. If the density of the solution is 1.072 g mL–1, then what shall be the molarity of the solution?

Options:
A 10.02M
B 6.11M
C 12.32M
D 9.10M

The correct answer is:
9.10M

Solution:
Correct Option is : (D)
9.10M

Topic: Chemistry, Solutions, NEET
An antiviral substance known to prevent the synthesis of new virus in the cell is known as

Options:
A Interferon
B Antibody
C H2L2
D Both (B) and (C)

The correct answer is:
Interferon

Solution:
Interferons are glycoprotein secreted by virus-infected cells protects non-infected cells from virus. They act as physiological barriers forming a part of innate immunity. This anti-viral protein made up to 270 amino acids secreted by virus-infected cells and stimulates the adjacent cells to produce the Translation Inhibiting Protein (T.I.P.)

Topic: Biology, Human Health and Diseases, NEET
An apocarpous ovary is that in which all carpels are free. It is found in

Options:
A tomato
B lotus
C mustard
D both (A) and (C)

The correct answer is:
lotus

Solution:
An Ovary is the basal enlarged part of a carpel. Multicarpellary gynoecium may be of two types: Apocarpous and Syncarpous. In Apocarpous condition free carpels are present while in syncarpous condition carpels are fused with each other. Apocarpous ovary is present in Lotus.
Syncarpous ovary is present in Mustard and Tomato.

Topic: Biology, Morphology of Flowering Plants, NEET
An aqueous mixture at room temperature is 0.1 M with respect to ammonium chloride and 0.01 M with respect to NH4OH ; pKb of aqueous ammonia as a base is 5. The pH of the mixture is nearly

Options:
A 7.5
B 6.8
C 6.5
D 8.0

The correct answer is:
8.0

Solution:
pOH=pKb+log[Salt][Base]
So 14-pH=5+log0.1M0.01M
=5+log10=5+1=6
or pH=14-6=8.0 .

Topic: Chemistry, Ionic Equilibrium, NEET
An aqueous solution contains 5% by mass of urea and 10% by mass of glucose. If K f for water is 1.86â K kg mol â1 , the freezing point of the solution is

Options:
A −3.03 K
B 3.03 K
C −3.03   o C
D 3.03   o C

The correct answer is:
−3.03   o C

Solution:
Moles of solute =560+10180=25180
Molality =  n × 1000 weight of solvent
Molality of solution =25Ã1000180Ã85
ÎTf=25Ã1000Ã1.86180Ã85=3.03
F.P.=0−3.03   o C=−3.03   o C

Topic: Chemistry, Solutions, NEET
An aqueous solution contains 0.10 M H2S and 0.20 M HCl. If the equilibrium constants for the formation of HS– from H2S is 1.0×10-7 and that of S2- from HS- ions is 1.2×10-13 then the concentration of S2- ions in aqueous solution is

Options:
A 5×10-19
B 5×10-8
C 3×10-20
D 6×10-21

The correct answer is:
3×10-20

Solution:
H2S(aq)(0.1-x)=0.1⇌2H+(2x+0.20)≃0.2+S2-x,
Ka=Ka1=1.2×10-20
1.2×10-20=(0.2)2×[S2-]0.1
[S2-]=3×10-20 '

Topic: Chemistry, Chemical Equilibrium, NEET
An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase ?

Options:
A Addition of $\mathrm{NaCl}$
B Addition of $\mathrm{Na}_2 \mathrm{SO}_4$
C Addition of 1.00 molal KI
D Addition of water

The correct answer is:
Addition of water

Solution:
Key Idea Vapour pressure depends upon the surface area of the solution. Larger the surface area, higher is the vapour pressure.
Addition of solute decreases the vapour pressure as some sites of the surface are occupied by solute particles, resulting in decreased surface area. However, addition of solvent, ie, dilution, increases the surface area of the liquid surface, thus results in increased vapour pressure.
Hence, addition of water to the aqueous solution of (1 molal) KI, results in increased vapour pressure.

Topic: Chemistry, Solutions, NEET, NEET 2010 (Screening)
An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase?

Options:
A addition of water
B addition of NaCl
C addition of Na2SO4
D addition of 100 molal KI

The correct answer is:
addition of water

Solution:
As on increasing water amount, the mole fraction of solvent (H2O) increases in the solution so vapour pressure of solution also increases (Raoult’s law)

Topic: Chemistry, Solutions, NEET
An aqueous solution of 2% non-volatile solute exerts a pressure of 1.004 bar at the normal boiling point of the solvent. What is the molar mass of the solute?

Options:
A 96.44 g mol-1
B 22.21 g mol-1
C 76.42 g mol-1
D 41.35 g mol-1

The correct answer is:
41.35 g mol-1

Solution:
Correct Option is : (D)
41.35 g mol-1

Topic: Chemistry, Solutions, NEET
An aqueous solution of AgNO3with platinum electrodes: What is the product formed at the cathode during the electrolysis of an aqueous solution of AgNO3 with platinum electrodes?

Options:
A Ag⁺ ions
B Oxygen gas (O2)
C Solid silver (Ag)
D Hydrogen ions (H⁺)

The correct answer is:
Solid silver (Ag)

Solution:
Correct Option is : (C)
Solid silver (Ag)

Topic: Chemistry, Redox Reactions, NEET
An aqueous solution of AgNO3with silver electrodes: What is the product formed at the cathode during the electrolysis of an aqueous solution of AgNO3with silver electrodes?

Options:
A Ag⁺ ions
B Oxygen gas (O2)
C Solid silver (Ag)
D Hydrogen ions (H⁺)

The correct answer is:
Solid silver (Ag)

Solution:
Correct Option is : (C)
Solid silver (Ag)

Topic: Chemistry, Redox Reactions, NEET
An aqueous solution of borax is

Options:
A neutral
B amphoteric
C basic
D acidic

The correct answer is:
amphoteric

Solution:
Correct Option is : (B)
amphoteric

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
An aqueous solution of CuCl2with platinum electrodes: What is the product formed at the cathode during the electrolysis of an aqueous solution of CuCl2with platinum electrodes?

Options:
A Copper ions (Cu²⁺)
B Chlorine gas (Cl2)
C Solid copper (Cu)
D Hydrogen ions (H⁺)

The correct answer is:
Copper ions (Cu²⁺)

Solution:
Correct Option is : (A)
Copper ions (Cu²⁺)

Topic: Chemistry, Redox Reactions, NEET
An aqueous solution of hydrogen sulphide shows the equilibrium,
H2S⇌H++HS-
If dilute hydrochloric acid is added to an aqueous solution of hydrogen sulphide without any change in temperature, then

Options:
A the equilibrium constant will change
B the concentration of HS- will increase
C the concentration of undissociated hydrogen sulphide will decrease
D the concentration of HS- will decrease

The correct answer is:
the concentration of HS- will decrease

Solution:
Ka for H2S=[H+][HS-][H2S]
Due to common ion effect an increase in [H+] will show a decrease in [HS-] as dissociation of H2S will decrease.

Topic: Chemistry, Ionic Equilibrium, NEET
An aqueous solution of titanium chloride, when subjected to magnetic measurement, measured zero magnetic moment. Assuming the octahedral complex in aqueous solution, the formulae of the complex is

Options:
A [Ti(H2O)6]Cl2
B [Ti(H2O)6]Cl4
C [TiCl2(H2O)3]
D [TiCl2(H2O)4]

The correct answer is:
[Ti(H2O)6]Cl4

Solution:
[Ti(H2O)6]Cl4
This complex has Coordination number 6 with weak ligands so it is an outer orbit complex with sp3d2 -hybridisation and octahedral geometry. In it Ti is in +4 oxidations state so it has no unpaired electrons hence magnetic moment = 0 B.M.

Topic: Chemistry, Coordination Compounds, NEET
An aqueous solution of urea (mol. mass â60â g mol â1 ) boils at 100.18 o C at 1 atm . Find the freezing temperature of soultion.
Given: Kf and Kb for water are 1.86 and 0.512 K kg mol â1 , respectively.

Options:
A 0.654 o C
B − 0.654 o C
C 6.54 o C
D − 6.54 o C

The correct answer is:
− 0.654 o C

Solution:
ÎTf=Kfm......(1)ÎTb=Kbm......(2)}âÎTfÎTb=KfKb ...... (3)
ÎTfâ Depression in freezing point
ÎTbâ Elevation in boiling point
Boiling point of water = 100 o C

Kf =1.86 K kg mol â1

Boiling point of urea in water = 100.18 o C

Kb=0.512 K kg mol â1

âÎTb=0.18
Freezing point of water = 0 o C

Freezing point of urea in water =â T o C

âÎTf=T

â from equation (3),

T0.18=1.860.512âT=0.6539

â Freezing point urea in water =â0 .654 o C

Topic: Chemistry, Solutions, NEET
An arbitrary surface encloses a dipole. What is the electric flux through this surface?

Options:
A Non-zero
B Zero
C Cannot be determined
D Infinite

The correct answer is:
Zero

Solution:
Correct Option is : (B)
Zero

Topic: Chemistry, Electrostatics, NEET
An area in the brain which is associated with strong emotions is

Options:
A Cerebral cortex
B Cerebellum
C Limbic system
D Medulla

The correct answer is:
Limbic system

Solution:
An area in the brain which is associated with strong emotions is Limbic system.

Topic: Biology, Neural Control and Coordination, NEET
An aromatic compound ‘A’ (Molecular formula C8H8O) gives positive 2, 4-DNP test. It gives a yellow precipitate of compound ‘B’ on treatment with iodine and sodium hydroxide solution. Compound ‘A’ does not give Tollens or Fehling’s test. On drastic oxidation with potassium permanganate it forms a carboxylic acid ‘C’ (Molecular formula C7H6O2), which is also formed along with the yellow compound in the above reaction. Identify A, B and C.

Options:
A A=Acetophenone, B=CHCl3and C=Benzoic acid
B A=Acetophenone, B=CHI3and C=Benzoic acid
C A=Acetaldehyde, B=CHI3and C=Benzoic acid
D A=Acetophenone, B=CHI3and C=Benzaldehyde

The correct answer is:
A=Acetophenone, B=CHI3and C=Benzoic acid

Solution:
Correct Option is : (B)
A=Acetophenone, B=CHI3and C=Benzoic acid

Topic: Chemistry, Aldehydes and Ketones, NEET
An aromatic compound ‘A’ on treatment with aqueous ammonia and heating forms compound ‘B’ which on heating with Br2and KOH forms a compound ‘C’ of molecular formula C6H7N. What are the IUPAC names of compounds A, B and C?

Options:
A A= Benzoic acid, B=Benzamide and C=Aniline
B A= Aniline, B=Benzamide and C=Benzoic acid
C A= Benzamide, B=Benzoic acid and C=Aniline
D A= Benzoic acid, B=Aniline and C=Benzamide

The correct answer is:
A= Benzoic acid, B=Benzamide and C=Aniline

Solution:
Correct Option is : (A)
A= Benzoic acid, B=Benzamide and C=Aniline

Topic: Chemistry, Amines, NEET
An aromatic compound 'P' having molecular formula C7H6O2 on treating with aqueous ammonia and heating forms compound 'Q'. The compound 'Q' on reaction with molecular bromine and potassium hydroxide provides compound 'R' having molecular formula C6H7N . The structure of compound 'P' is

Options:
A
B
C
D

The correct answer is:

Solution:
C 7 H 6 O 2 P → 1 aq. NH 3 2 Δ Q → Br 2 KOH R
Here P is an acid, Q is amide and Q to R is Hoffmann's bromamide degradation as follows

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
An arrangement of three parallel straight wires placed perpendicular to plane of paper carrying same current I along the same direction is shown in Figure. Magnitude of force per unit length on the middle wire B is given by

Options:
A μ0I22πd
B 2μ0I2πd
C 2μ0I2πd
D μ0I22πd

The correct answer is:
μ0I22πd

Solution:
Force per unit length between two parallel long current carrying wires is = μ 0 I 1 I 2 2πd
Here, force between BC and AB will be same in magnitude.

FBC=FBA=μ0I22πd
Fres=FBC2+FBA2
⟹Fres=2μ0I22πd=μ0I22πd

Topic: Physics, Magnetic Effects of Current, NEET, NEET 2017
An artificial satellite is moving in a circular orbit around the Earth. The height of the satellite above the surface of Earth is R. Suppose the satellite is stopped suddenly in its orbit and allowed to fall freely. On reaching Earth, its speed will be

Options:
A gR
B 2gR
C 3gR
D 5gR

The correct answer is:
gR

Solution:
Using conservation of energy,
12mv2-GMmR=0-GMm2R
12mv2=GMmR-GMm2R
v2=2GMR1-12
v2=GMR
But gR2=GM
∴ v=gR2R
v=gR

Topic: Physics, Gravitation, NEET
An artificial satellite is moving in a circular orbit around the earth with a speed equal to half the magnitude of escape velocity from the earth. The height of satellite above the surface of earth is -(where R=radius of earth)

Options:
A R
B 2 R
C 3 R
D 4 R

The correct answer is:
R

Solution:
escape velocity V s = 2Gm R
orbital velocity V 0 = Gm r
given V 0 = 1 2 V e
⇒ GmR+h =122GmR
⇒R+h=2R or h=R

Topic: Physics, Gravitation, NEET
An artificial satellite moving in a circular orbit around the Earth has a total (kinetic + potential) energy E0. Its potential energy is

Options:
A -E0
B 1.5 E0
C 2 E0
D E0

The correct answer is:
2 E0

Solution:
We know that U=-GMmr
and E0=-GMm2r
therefore U=2E0

Topic: Physics, Gravitation, NEET
An artillery piece which consistently shoots its shells with the same muzzle speed has a maximum range R. To hit a target which is R2 from the gun and on the same level, the angle of elevation of the gun should be

Options:
A 15°
B 45°
C 30°
D 60°

The correct answer is:
15°

Solution:
Rmax=R=u2g (at an angle of 45°)
u2=Rg
Using Range=u2sin2θg
then R2=Rgsin2θg
sin 2 θ = 1 2
2θ=30° ⇒ θ=15°

Topic: Physics, Motion In Two Dimensions, NEET
An asexual structure is shown in the given diagram. In which of the following organism, the given structure is found?

Options:
A Apergillus
B Hydra
C Volvox
D Sponge.

The correct answer is:
Sponge.

Solution:
Asexual reproductive structureslike :
(i) Zoospores. Examples : Members of Kingdom Fungi and simple plants like algae (Chlamydomonas).
(ii) Conidia. Example : Penicillium.
(iii) Buds. Example : Hydra.
(iv) Gemmules. Example : Sponges.

Topic: Biology, Animal Kingdom, NEET
An association between roots of higher plants and fungi is called

Options:
A Lichen
B Fern
C Mycorrhiza
D BGA

The correct answer is:
Mycorrhiza

Solution:
An association between roots of higher plants and fungi is called Mycorrhiza.

Topic: Biology, Biological Classification, NEET
An association essential and beneficial to both the partners is observed between:

Options:
A Ophrys and bees
B Sea anemone and clownfish
C Cuckoo and crow
D Cuscuta and hedge plants

The correct answer is:
Ophrys and bees

Solution:
Mutualism is defined in a way that reflects the positive signs characterizing the outcome of their interactions, that is, as interactions between individuals of different species that benefit both of them. Orchids show a bewildering diversity of floral patterns many of which have evolved to attract the right pollinator insect (bees and bumblebees) and ensure guaranteed pollination by it (Figure 13.7). Not all orchids offer rewards. The Mediterranean orchid Ophrys employs âsexual deceitâ to get pollination done by a species of bee.

Topic: Biology, Organisms and Populations, NEET
An association of individuals of different species living in the same habitat and having functional interactions is:

Options:
A Biotic community
B Ecosystem
C Population
D Ecological niche

The correct answer is:
Biotic community

Solution:
Population: It is a grouping of individuals of the same species inhabiting a given area.

Biological Community: It is an assemblage of the population of different species present in an area which show interdependence and interaction like competition, predation, host-parasite, amensalism etc.

Ecosystem: It is composed of a biological community, integrated with its physical environment through the exchange of energy and recycling of the nutrients.

The ecological niche of organisms represents, the range of conditions that it can tolerate, the resource it utilizes and its functional role in the ecological system. Each species has a distinct niche and no two species are believed to occupy reproduction in its habitat through natural selection.

Topic: Biology, Ecosystem, NEET, NEET 2015 (Phase 2)