datavorous/entrance-exam-dataset huggingface dataset:
The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are:

Options:
A Cristae
B Grana
C Stroma lamellae
D Stroma

The correct answer is:
Grana

Solution:
In the chloroplasts, there are stacks of flattened membranous discs known as thylakoids. They appear as similar stacks of coins. Inside the chloroplast, and they trap the energy from sunlight to carry out photosynthesis. These stacks of thylakoids are known as grana. A system of tubules connects them.

Topic: Biology, Cell - The Unit of Life, NEET, NEET 2015 (Phase 1)
The structures that are interconnected by corpus callosum are:

Options:
A Cerebral hemispheres
B Ventricles of brain
C Cerebellar hemispheres
D Thalamus

The correct answer is:
Cerebral hemispheres

Solution:
Cerebrum forms a major part of the human brain. A deep cleft divides the cerebrum longitudinally into two halves, which are termed as the left and right cerebral hemispheres. The hemispheres are connected by a tract of nerve fibres called corpus callosum. Corpus callosum is a broadband of nervous tissue that connects two cerebral hemispheres. It consists of 300 million fibres and is present only in mammals.

Topic: Biology, Neural Control and Coordination, NEET
The study of action of drug is known as

Options:
A Physiology
B Pharmacology
C Phramacognosy
D Pharmaceutical chemistry

The correct answer is:
Pharmacology

Solution:
1: the science of drugs including their origin, composition, pharmacokinetics, therapeutic use, and toxicology
2: the properties and reactions of drugs especially with relation to their therapeutic value

Topic: Chemistry, Chemistry in Everyday Life, NEET
The study of communities of various genera and species is called

Options:
A community ecology
B synecology
C autecology
D Both (a) and (b)

The correct answer is:
Both (a) and (b)

Solution:
Synecology or community ecology is the study of reciprocal relationships between composition, organization and development of communities and their environment.

Topic: Biology, Organisms and Populations, NEET
The study of the energy transfer and relationships between all living organisms is known is

Options:
A Thermodynamics
B Bioenergetic
C Kinetic energy
D Potential energy

The correct answer is:
Thermodynamics

Solution:
Energy is the capacity to do work and all living beings must work to live. The green plants convert radiant energy Bioenergetics is the branch of science studied with use and transformation of energy by living cells (organisms). The energy flow in living systems obeys the first and second laws of a branch of Physics known as thermodynamics.
Kinetic energy (K) is determined by the equation k=mv22e.g. The large particle, which have greater mass moves at slower velocity while the smaller particles, which have low mass move at high velocity.

Topic: Biology, Organisms and Populations, NEET
The study of trends in human population growth and the prediction of future development is known as

Options:
A Sociology
B Geography
C Demography
D Anthropology

The correct answer is:
Demography

Solution:
Demography is the study of human population growth and prediction of future development. Some of the attributes of the population are used to estimate its growth as population size and may fluctuate in a given habitat during a given period of time.

Topic: Biology, Organisms and Populations, NEET
The study related to the given below pictorial representation is

Options:
A Sociology
B Geography
C Demography
D Anthropology

The correct answer is:
Anthropology

Solution:
Demography is the study of human population growth and prediction of future development. Anthropology is the field of study of humans and its behavior and societies in the past and present. Sociology is the study of the development, structure, and functioning of human society. Geography is the study of places and the relationships between people and their environments.

Topic: Biology, Evolution, NEET
The substance produced by a cell in a viral infection that can protect other cells from further infection are:

Options:
A serotonin
B colostrum
C interferon
D histamine

The correct answer is:
interferon

Solution:
Virus-infected cells secrete proteins called interferons which protect non-infected cells from further viral infection.

Topic: Biology, Human Health and Diseases, NEET
The substrate in Krebs cycle which undergoes a reaction very similar to pyruvic acid in mitochondria is

Options:
A aconitate
B succinic acid
C alpha-ketoglutaric acid
D fumaric acid

The correct answer is:
alpha-ketoglutaric acid

Solution:
In the mitochondria, pyruvic acid undergoes oxidative decarboxylation to form acetyl Co-A as follows:
In Krebs cycle, alpha-ketoglutaric acid also undergoes oxidative decarboxylation to form succinyl co-A as follows:

Topic: Biology, Respiration in Plants, NEET
The subunits of the protein coat of a virus determine its

Options:
A pathogenicity
B virulence
C genetic material
D shape

The correct answer is:
shape

Solution:
The protein coat of a virus called capsid is made of small subunits called capsomeres, which protects the nucleic acid. These capsomeres are arranged in helical or polyhedral geometric forms.

Topic: Biology, Biological Classification, NEET
The successive ionization energy values of an element are 7.1, 14.3, 34.5, 46.8 and 162.2 eV respectively. The element is likely to be:

Options:
A Na
B Si
C F
D Ca

The correct answer is:
Si

Solution:
The IE1, IE2, IE3, IE4 and IE5 of an element are 7.1, 14.3, 34.5, 46.8 and 162.2 eV respectively. Therefore, We can see that there is a regular very close increment of ionization energy till the fourth ionization energy. After the fourth ionization energy, there is a sudden high jump in energy. It confirms that after losing four electrons, that element will achieve the noble gas configuration or stable configuration.

Na11→1s2 2s2 2p6 3s1

Si14→1s2 2s2 2p6 3s2 3p2

F9→1s2 2s2 2p5

We can see the configuration of the elements and can identify that silicon has this tendency to lose the four electrons and gets the noble gas configuration.

the valency of the element is 4 and it is most likely to be silicon.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
The suction pressure of the cell is

Options:
A equal to wall pressure
B equal to turgor pressure
C equal to DPD
D osmotic pressure

The correct answer is:
equal to DPD

Solution:
The negative pressure difference formed between two points that enables flow of gas or liquid to a lower state from higher state is called suction pressure.
The pressure that enables entry of water into the cell due to osmosis is the osmotic pressure (OP) and it is considered negative. The pressure developed in cell due to entry of water and acting opposite to the OP is called turgor pressure (TP). It is a negative pressure as it resists entry of water in cell. The difference between these two results in diffusion pressure deficit (DPD) that equates to the suction pressure. It is directly proportional to the height of the plant/tree.

Topic: Biology, Transport in Plants, NEET
The sudden mass killing of fishes is likely to be seen in a

Options:
A mesotrophic lake
B oligotrophic lake
C salt lake
D eutrophic lake

The correct answer is:
eutrophic lake

Solution:
Organic pollutants provide nutrients for stimulating the growth of algae and other plants. Algal bloom reduces the availability of light to submerged plants consumes more oxygen in decomposition. This reduces the availability of oxygen to other life forms leading to death of organisms. This is known as eutrophication.

Topic: Biology, Ecosystem, NEET
The suffix - aceae indicates

Options:
A Family
B Order
C Class
D Genus

The correct answer is:
Family

Solution:
In the Linneaus system of the classification there are seven levels that are also called taxa. He is also called the father of modern taxonomy. The taxa are arranged from the largest to the smallest in which family is present between order and genus and that includes one or more genera. Its suffix is -aceae.Example: Brassicaceae, Papaveraceae, Liliaceae, etc. To represent Order suffix should be -ales

Topic: Biology, The Living World, NEET
The suffix - idae is used for

Options:
A Species
B Family
C Class
D Genus

The correct answer is:
Family

Solution:
In animals, the family end in the suffix - idae. Example Hominidae Muscidae, Felidae, Canidae, etc.

Topic: Biology, The Living World, NEET
The sugar present in milk is

Options:
A Sucrose
B Fructose
C Lactose
D Glucose

The correct answer is:
Lactose

Solution:
Lactose is a disaccharide. It is a sugar composed of galactose and glucose subunits and has the molecular formula C12H22O11. Lactose makes up around 2%–8% of milk

Topic: Chemistry, Biomolecules, NEET
The sum of coordination number and oxidation number of metal M in the complex Men2C2O4Cl (Where en is ethylenediamine) is:

Options:
A 9
B 6
C 7
D 8

The correct answer is:
9

Solution:
Men2C2O4Cl
Oxidation state of M = +3

en and oxalate ion are bidentate ligands. So, Coordination number of M = 6
Sum of oxidation state + Coordination number = 3 + 6 = 9

Topic: Chemistry, Coordination Compounds, NEET, NEET 2015 (Phase 2)
The sum total of genes of all the individuals in a Mendelian population constitutes

Options:
A gene pool
B gene flow
C genetic drift
D genotype

The correct answer is:
gene pool

Solution:
Gene pool is a collection of genetic information in a population, and it is represented as the total of all the genes of the organism or species. Gene flow is genetic migration or variation in the population. Genetic drift is when small population drifts into a nearby area. This can be founder effect or bottle neck effect. The genotype is genetic information of an individual.

Topic: Biology, Principles of Inheritance and Variation, NEET
The sun radiates electromagnetic energy at the rate of 3.9Ã1026 W. Its radius is 6.96Ã108 m. The intensity of sunlight at the solar surface will be - (in W m-2 )

Options:
A 1.4×104
B 2.8×105
C 4.2×106
D 6.4×107

The correct answer is:
6.4×107

Solution:
Isurface=PA=3.9Ã10264Ã3.14Ã6.962Ã1016
=6.4Ã107 W m-2

Topic: Physics, Wave Optics, NEET
The superposition takes place between two waves of frequency f and amplitude a. The maximum intensity Imax=constant×____

Options:
A a
B 2a
C 2a2
D 4a2

The correct answer is:
4a2

Solution:
Resultant amplitude
A=a2+a2+2aacosâ¡Ï=4a2cos2â¡Ï2
A=2acosâ¡Ï2
â´ IâA2
â Iâ4a2

Topic: Physics, Waves and Sound, NEET
The surface area of a black body is 5Ã10-4 m2 and its temperature is 727 â. Energy radiated by it per minute is (Take Ï=5.67Ã10-8 J m-2 s-1 K-4)

Options:
A 1.7Ã103 J
B 2.5×102 J
C 3Ã104 J
D 2.7Ã104 J

The correct answer is:
1.7Ã103 J

Solution:
From Stefan's law
E=ÏT4A
Given, T=727â=727+273=1000 K
A=5Ã10-4 m2
â´ Energy=5.67Ã10-8100045Ã10-460
â´ E=1.7Ã103 J

Topic: Physics, Thermal Properties of Matter, NEET
The surface density of charge on the surface of a charged conductor in the air is 26.5 Î¼C m-2. Then the outward force per unit area of the charged conductor is Îµ0=8.85Ã10-12 C2 N-1 m-2

Options:
A 3.5 N m-2
B 17.7 N m-2
C 8.85 N m-2
D 39.7 N m-2

The correct answer is:
39.7 N m-2

Solution:
Ï=26.5 Î¼Cm2=26.5 Ã10-6 Cm2
dFds= Ï22kÎµ0
dFds=26.5 Ã 26.5 Ã 10-122 Ã 1 Ã 8.85 Ã 10-12 â¦âµk=1 for air
=39.67 Nm2 â39.7 Nm2

Topic: Physics, Electrostatics, NEET
The surface of a metal is illuminated with a light of wavelength 400 nm. The maximum kinetic energy of the ejected photoelectrons was found to be 1.68 eV. The work function of the metal is hc=1240 eV nm

Options:
A 3.09 eV
B 1.41 eV
C 1.51 eV
D 1.68 eV

The correct answer is:
1.41 eV

Solution:
âµ hcÎ»=12mv2+Ï
â Ï=hcÎ»â12mv2
Ï=1240400â1.68=1.41 eV

Topic: Physics, Dual Nature of Matter, NEET
The surface temperature of the stars is determined using

Options:
A Planck's law
B Wien's displacement law
C Rayleigh-Jeans law
D Kirchhoff's law

The correct answer is:
Wien's displacement law

Solution:
The surface temperature of the stars is determined using Wien's displacement law.
According to this (law)Î»mT=b where b is Wien's constant whose value is 2.898Ã10-3 mK.

Topic: Physics, Thermal Properties of Matter, NEET
The surface tension of a thin liquid film formed between a U shaped wire and a light slider of length 30cm supporting a weight of 1.5Ã10-2 N is

Options:
A 0.0125 Nm-1
B 0.1 Nm-1
C 0.05 Nm-1
D 0.025 Nm-1

The correct answer is:
0.025 Nm-1

Solution:
There will be two surface formed (front side and back side) and force due to surface tension will be given by:

F=TL +TL =2TL

Force must balance the weight to keep it in equilibrium

W=2TLmg=2TLT=mg2LT=1.5×10-22×0.3=0.025 Nm-1

Topic: Physics, Mechanical Properties of Fluids, NEET
The surface tension of water is 0.072 N m-1. The excess pressure inside a water drop, of diameter 1.2 mm, is

Options:
A 240 N m-2
B 120 N m-2
C 0.06 N m-2
D 72 N m-2

The correct answer is:
240 N m-2

Solution:
P=2Sr=4SD=4×0.0721.2×10-3=240Nm-2

Topic: Physics, Mechanical Properties of Fluids, NEET
The surface tension of which of the following liquid is maximum?

Options:
A $\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$
B $\mathrm{CH}_3 \mathrm{OH}$
C $\mathrm{H}_2 \mathrm{O}$
D $\mathrm{C}_6 \mathrm{H}_6$

The correct answer is:
$\mathrm{H}_2 \mathrm{O}$

Solution:
More is the hydrogen bonding; more is the surface tension.
Thus, order of surface tension is:
$$
\mathrm{H}_2 \mathrm{O}>\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}>\mathrm{CH}_3 \mathrm{OH}>\mathrm{C}_6 \mathrm{H}_6
$$

Topic: Chemistry, States of Matter, NEET, NEET 2005
The surgical removal of the thymus of a newborn will result in the failure of development of

Options:
A anti-allergic granulocyte.
B phagocytic agranulocytes.
C humoral immunity.
D cell-mediated immunity.

The correct answer is:
cell-mediated immunity.

Solution:
The thymus gland is located behind the sternum and on ventral side of aorta. This gland is known as 'throne of immunity' as it is responsible for the development of immune system. It secretes hormones known as thymosins which play a major role in the differentiation of T lymphocytes. Thus if the thymus is surgically removed it will result in the failure to produce T-lymphocytes which provides cell-mediated immunity.

Topic: Biology, Human Health and Diseases, NEET
The surgical removal or cutting and ligation of the ends of oviduct is known as:

Options:
A Tubectomy
B Oviductomy
C Vasectomy
D Ovarioctomy

The correct answer is:
Tubectomy

Solution:
Sterilization provides a permanent and ensures birth control. It is called vasectomy in man and tubectomy in women.

Topic: Biology, Reproductive Health, NEET
The suspension milk of lime is composed of:

Options:
A Ca(OH)2
B CaO
C CaCl2
D CaSO4

The correct answer is:
Ca(OH)2

Solution:
Calcium hydroxide is a white amorphous powder. It is sparingly soluble in water. The aqueous solution is known as lime water and a suspension of slaked lime in water is known as milk of lime.

Topic: Chemistry, s Block Elements, NEET
The suspension of slaked lime in water is known as

Options:
A limewater.
B quicklime.
C milk of lime.
D aqueous solution of slaked lime.

The correct answer is:
milk of lime.

Solution:
The suspension of slaked lime in water is known as​ milk of lime.

If aqueous solution is made, then it is known as lime water.

Topic: Chemistry, s Block Elements, NEET, NEET 2016 (Phase 2)
The symbolic representation of four logic gates
The logic symbols for OR, NOT and NAND gates are respectively

Options:
A (iii), (iv), (ii)
B (iv), (i), (iii)
C (iv), (ii), (i)
D (i), (iii), (iv)

The correct answer is:
(iv), (ii), (i)

Solution:

Topic: Physics, Semiconductors, NEET, NEET 2009 (Screening)
The symptoms of a genetic order are short-statured with a small round head, furrowed tongue and partially open mouth. Such a genetic disorder is characterized by the presence of an extra chromosome number_______.

Options:
A 20
B 21
C 17
D 23

The correct answer is:
21

Solution:
The chromosomal disorder occurs when there is addition or deletion of chromosome in the individual. In case of trisomy of the 21st chromosome causes Down's syndrome. The affected individual is short-statured with small round head, furrowed tongue and partially open mouth. Palm is broad with characteristic palm crease. Physical, psychomotor and mental development is retarded.

Topic: Biology, Principles of Inheritance and Variation, NEET
The symptoms of allergy can be reduced by

Options:
A Anti-histamine
B Adrenalin
C Steroids
D All of these

The correct answer is:
All of these

Solution:
The use of drugs like anti-histamine, adrenalin, and steroids quickly reduces the symptoms of allergy.

Topic: Biology, Human Health and Diseases, NEET
The synthesis of alkyl fluorides is best accomplished by:

Options:
A Swarts reaction
B Free radical fluorination
C Sandmeyer's reaction
D Finkelstein reaction

The correct answer is:
Swarts reaction

Solution:
Alkyl fluorides is best accomplished by swarts reaction i.e. heating an alkyl chloride/bromide in the presence of metallic fluoride such as AgF, Hg2F2, CoF2, SbF3.
CH 3 Br + AgF → CH 3F + AgBr

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
The synthesis of replisome takes place during which stage of the cell cycle?

Options:
A G1 phase
B G2 phase
C S-phase
D Interphase II

The correct answer is:
G1 phase

Solution:
During G1 phase, the cell grows in size and synthesizes mRNA and proteins that are required for DNA synthesis. Once the required proteins and growth are complete, the cell enters the next phase of the cell cycle, S phase

Topic: Biology, Cell Cycle and Cell Division, NEET
The system is pushed by a force F as shown in the figure. All surfaces are smooth except between B and C. Friction coefficient between B and C is μ. Minimum value of F to prevent block B from downward slipping is

Options:
A 32μmg
B 52μmg
C 52μmg
D 32μmg

The correct answer is:
52μmg

Solution:
NC=F5m2m=2F5
Since block B is not falling therefore.
μNC=mg
μ2F5=mg
F=52μmg

Topic: Physics, Laws of Motion, NEET
The system is released from rest with both the spring in unstretched positions. Mass of each block is 1 kg and force constant of each spring is 10 N/m.

Extension of horizontal spring in equilibrium is

Options:
A 0.2 m
B 0.4 m
C 0.6 m
D 0.8 m

The correct answer is:
0.4 m

Solution:
In equilibrium F net = 0
T = kx ........ (1)
2 T + kx 2 = mg ........ (2)
Solving these equations, we have
x = 2 mg 5 k = 2 Ã 1 Ã 1 0 5 Ã 1 0 = 0.4 m
Let v be the speed of block placed horizontally, then
1 2 mv 2 + 1 2 m v 2 2 + 1 2 kx 2 + 1 2 k x 2 2 = mg x 2
or 5 8 mv 2 = mgx 2 - 5 8 kx 2
or v = 8 5 gx 2 - 5 kx 2 8 m
Substituting the values, we have
v = 8 5 1 0 Ã 0.4 2 - 5 Ã 1 0 Ã 0.16 8 Ã 1
= 1.26 m/s

Topic: Physics, Work Power Energy, NEET
The system of two blocks is at rest as shown in the figure. A variable horizontal force is applied to the upper block. The maximum possible contact force exerted by the horizontal ground surface on the lower block is (coefficient of friction for both the contacts is μ )

Options:
A 3mg1+μ2
B 3μmg
C Î¼mg
D mg9+μ2

The correct answer is:
3mg1+μ2

Solution:
The lower block will not move in this case Apply equilibrium equation on upper block
⇒ F=μmg
Total normal force = 3mg
maximum friction force on lower black by ground =μN
=3μmg
⇒ Resultant force =μN2+N2
=mg9μ2+9
=3mg 1+ μ 2

Topic: Physics, Laws of Motion, NEET
The system of two rods shown in figure is vibrating at the same frequency having standing wave with junction as node a standing wave. The ratio of the number of antinodes in the two rods, if the radii of the rods are in the ratio, rBrA=2 is (rA and rB are radii of the two the rods respectively)

Options:
A 1
B 2
C 3
D 4

The correct answer is:
2

Solution:
For rod A, f1=n12lTρA1
For rod B,
f2=n22lTρA2
Given f1=f2.
n12lTρA1=n22lTρA2∵rB=2rA, A2=4A1
n12lTρA1=n22lTρ(4A1)
n1=n22
n2n1=2

Topic: Physics, Waves and Sound, NEET
The system shown in the figure is in equilibrium and at rest. The spring and string are massless, now the string is cut. The acceleration of mass 2 m and m just after the string is cut will be

Options:
A g2 upward, g downward
B g upward, downward
C g upward, 2g downward
D 2g upward, g downward

The correct answer is:
g2 upward, g downward

Solution:
Initially under equilibrium of mass m
T=mg
Now, the string is cut. Therefore, T=mg force is decreased on mass m upward and downwards on mass 2m.
∴ am=mgm=g downwards
and a2m=mg2m=g2 (upwards)

Topic: Physics, Laws of Motion, NEET
The system shown in the figure is released from rest with spring in natural length and string just taut. The pulley and the spring are massless and friction is absent everywhere. The value of spring constant is k=40 N m-1. The speed of 5 kg block when 2 kg block leaves contact with the support below it, will be

Options:
A 2 m s-1
B 22 m s-1
C 2 m s-1
D 42 m s-1

The correct answer is:
22 m s-1

Solution:
T=20 N and kx=20 N
â´ x=2040=12 m
Now mgx=12mv2+12kx2
â 5Ã10Ã12=12Ã5v2+12Ã40Ã14
â 25=5+52v2
âv=22 m s-1

Topic: Physics, Work Power Energy, NEET
The table below gives the population (in thousands) of ten species (A-J in four areas (a-d) consisting of the number if habitats given within brackets against each. Study the table and answer the question which follows :

Which area out of a to d shows maximum species diversity ?

Options:
A b
B c
C d
D a

The correct answer is:
d

Solution:
Species diversity is the variety in the number and richness of the species of a region. The number of species per unit area is called species richness. The number of individuals of different species represent species evenness or species equitability. Communities where species are represented by a more or less equal number of individuals exhibit evenness. Others where one or more species have more individuals than others show dominance or unevenness. Species diversity is a product of both species richness or evenness or equitability, i.e., species richness weighed by species evenness. Hence, area (d) and a number of habitats (12) shows the maximum species diversity.

Topic: Biology, Biodiversity and its Conservation, NEET
The table below gives the populations (in thousands) of ten species $(A-J)$ in four areas (a-d) consisting of the number of habitats given within brackets against each. Study the table and answer the question which follows:
Which area out of a to d shows maximum species diversity?

Options:
A $\mathrm{b}$
B $c$
C d
D a

The correct answer is:
d

Solution:
Habitat is the place where an organism live. Population has been defined as a collective group of organisms of the same species occupying a particular place at a particular time. In the given table the area $\mathrm{d}$ has maximum species diversity, as there are 10 species (A-J) reside in 12 habitats, while in area $c$ the 10 species reside in 13 habitats so, exhibit less diversity than area $d$.

Topic: Biology, Organisms and Populations, NEET, NEET 2008 (Screening)
The table gives the first four ionization energies in kJ mol-1 of four elements (the letters are not the symbols for the elements). Which element occurs in Group 13 of the periodic table?

Options:
A IE1IE2Element P5024569 IE3IE469199550
B IE1IE2Element Q5267305 IE3IE411822-
C IE1IE2Element R5841823 IE3IE4275111584
D IE1IE2Element S7961583 IE3IE432384362

The correct answer is:
IE1IE2Element R5841823 IE3IE4275111584

Solution:
After losing three electrons in element R, there is sudden huge increase in IE from 2751 to 11584 kJ/mol. It means that after three electrons, some stable configuration is achieved. This is applicable to group 13 elements with outer configuration of ns2np1 .

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET