datavorous/entrance-exam-dataset huggingface dataset:
There are two types of organisms known to us based on cell types: prokaryote and eukaryote. Among the given features, select the one that distinguishes prokaryotic organisms from eukaryotic organisms.

Options:
A Prokaryotes are unicellular, while all eukaryotes are multicellular.
B Prokaryotes are aquatic, while eukaryotes are terrestrial.
C Prokaryotes are structurally less complex than eukaryotes are.
D Prokaryotes lack cell membrane, while eukaryotes do not.

The correct answer is:
Prokaryotes are structurally less complex than eukaryotes are.

Solution:
Prokaryotes are cells that are characterized by lack of membrane-bound organelles like nucleus, Golgi body, etc. These cells are of simple design and generally have cell wall around their cell membrane for support and rigidity. Organisms of this cell type are found in various habitat and not exclusively in water. These are found to be unicellular. Eukaryotes, on the other hand, are more complex and have membrane-bound organelles like nucleus. These organisms can be found as unicellular (Amoeba) and multicellular (human). Also, eukaryotes are not exclusively terrestrial; they are found in other habitats too.

Topic: Biology, Cell - The Unit of Life, NEET
There are various types of reproduction. The type of reproduction adopted by an organism depends on

Options:
A The habitat and morphology of the organism
B Morphology of the organism
C Morphology and physiology of the organism
D The organism's habitat, physiology and genetic makeup

The correct answer is:
The organism's habitat, physiology and genetic makeup

Solution:
The organism’s habitat, its internal physiology, and several other factors (genetic makeup) are collectively responsible for how it reproduces.

Topic: Biology, Reproduction in Organisms, NEET
There exists a close association between the alga and the fungus within a lichen. The fungus:

Options:
A provides protection, anchorage and absorption for the algae
B provides food for the alga
C fixes the atmospheric nitrogen for the alga
D releases oxygen for the alga.

The correct answer is:
provides protection, anchorage and absorption for the algae

Solution:
Lichens are unique, double organisms that consist of two unrelated components, an alga and/ or cyanobacterium (photobiont) and a fungus (mycobiont). Lichens are unique, double organisms that consist of two unrelated components, an alga and/or cyanobacterium (photobiont) and a fungus (mycobiont)
Related Theory
Lichens have a body called a thallus, an outer, tightly packed fungal layer called a cortex, and an inner, loosely packed fungal layer called a medulla. Lichens use hyphal bundles called rhizines to attach to the substrate.

Topic: Biology, Organisms and Populations, NEET, NEET 2005
There is a circular hole of diameter d=140 Î¼m at the bottom of a vessel containing mercury. The minimum height of mercury layer so that the mercury will not flow out of this hole is Surface tension, Ï=490Ã10-3 Nm-1

Options:
A 1.03 cm
B 1.53 mm
C 1.03 mm
D 1.53 cm

The correct answer is:
1.03 cm

Solution:
The pressure just inside the hole will be less than the outside pressure by 4σd i.e. ,2σr since mercury meniscus is convex.

Let a column of length h is required to balance the forces at Critical equilibrium such that

hρg=4σd

i.e., h=4σdρg

=4×490×10-3140×10-6×13600×10

=1960140×136=0.103 m

=1.03 cm

Topic: Physics, Mechanical Properties of Fluids, NEET
There is a hole in the bottom of a tank having water. If total pressure at the bottom is 3 atm 1 atm=105 N m-2, then the velocity of water flowing from the hole is

Options:
A 400 m s-1
B 600 m s-1
C 60 m s-1
D None of these

The correct answer is:
600 m s-1

Solution:
Pressure at the bottom of the tank is given by P=hρg=3×105 N m-2 and velocity of water is given by v=2gh.
∴ v = 2 P ρ = 2 × 3 × 1 0 5 1 0 3 = 6 0 0 m / s

Topic: Physics, Laws of Motion, NEET
There is a hole of area A at the bottom of a cylindrical vessel. Water is filled up to a height h and water flows out in t seconds. If water is filled to a height 4 h, then it will flow out in time

Options:
A 2 t
B 4Â t
C 16Â t
D None of these

The correct answer is:
2 t

Solution:
The volume of water in the vessel of the base area A and height h isV=Ah. The average velocity of outflowing water when the height of water changes from h to 0 is
v=2 gh+02=2gh2
∴V=A v t ...(i)
When the vessel is filled to height 4 h, then the volume in the vessel
=4V=4A vt=4A2gh2×t
If t is the time taken for the outflowing liquid and v1 is the average velocity of outflowing liquid then
4V=A v1t1
or t1=4 VA v1=4 A2gh×t×22×A×2g×4h=2t

Topic: Physics, Mechanical Properties of Fluids, NEET
There is a horizontal cylindrical uniform but time varying magnetic field increasing at a constant rate dBdt as shown. A charged particle having charge q and mass m is kept in equilibrium, at the top of a spring of spring constant K in such a way that it is on the horizontal line passing through the center of the magnetic field as shown in figure. The compression in the spring will be

Options:
A 1Kmg-qR22ldBdt
B 1Kmg+qR2ldBdt
C 1Kmg+2qR2ldBdt
D 1Kmg+qR22ldBdt

The correct answer is:
1Kmg+qR22ldBdt

Solution:
E2πl=π.R2dBdt
E=R22ldBdt
qE + mg = Kx
x=q.R2K2ldBdt+mgK
x = 1Kmg+qR22ldBdt .

Topic: Physics, Electromagnetic Induction, NEET
There is a leak proof cylinder of length 1 m, made of a metal that has very low coefficient of expansion is floating vertically in water at 0 Â°C such that its height above the water surface is 20 cm. If the temperature of water is increased to 4 Â°C, the height of the cylinder above the water surface becomes 21 cm. The density of water at T=4Â°C, relative to the density at T=0 Â°C is approximately

Options:
A 1.03
B 1.04
C 1.26
D 1.01

The correct answer is:
1.01

Solution:
mg=A(80)ρ0°Cg
mg=A(79)ρ4°Cg
ρ4°Cρ0°C=8079=1.01

Topic: Physics, Thermal Properties of Matter, NEET
There is a magnetic material of coercivity 2Ã103 A m-1. What current should flow through solenoid of length 15 cm having 150 turns to demagnetise the substance completely?

Options:
A 4Â A
B 2.5Â A
C 2 A
D 3.5Â A

The correct answer is:
2 A

Solution:
Coercivity is H=2×103,
For a solenoid, H=ni
Number of turns per unit length
n=15015×10-2=1000
⇒ i=Hn=2×103103=2 A

Topic: Physics, Magnetic Effects of Current, NEET
There is a mixture of n moles of helium gas and 2n moles of oxygen gas. The value of CPCV for the mixture is

Options:
A 2315
B 4027
C 6745
D 1913

The correct answer is:
1913

Solution:
γmix=n1cp1+n2cp2n1cv1+n2cv2=n52R+2n72Rn32R+2n52R=5+143+10=1913

Topic: Physics, Thermal Properties of Matter, NEET
There is a pendulum executing simple harmonic motion and its maximum kinetic energy is K1. If the length of the pendulum is doubled and it performs simple harmonic motion with the same angular amplitude as in the first case, its maximum kinetic energy is K2. Relation between them is

Options:
A K2
B K2=2K1
C K2=K1
D K2=k14

The correct answer is:
K2=2K1

Solution:
Maximum kinetic energy =12mω2A2
ω=gL
A=Lθ
KE=12mgL×L2θ2, KE=12mgLθ2
K1=12mgLθ2

If Length Is Double

K2=12mg(2L)θ2 [Here we are assuming angular amplitude is same]

K1K2=12mglθ212mg(2L)θ2=12
K2=2K1

Topic: Physics, Oscillations, NEET
There is a restriction endonuclease called $E c o$ RI. What does 'co' part in it stand for?

Options:
A Coelom
B Coenzyme
C coli
D Colon

The correct answer is:
coli

Solution:
Restriction endonuclease recognizes a particular palindromic sequence and degrades the same. It was so, called because it restricted the growth of bacteriophase in the bacterium ( $\mathrm{eg}, \mathrm{E}$. coli). The convention for naming these enzymes is the first letter of the name comes from the bacterial genus; the second two letters come from the species, and the fourth letter from strain, eg, Eco RI comes from Escherichia coli RY13. Roman numbers following the names indicate the order in which the enzymes were isolated.

Topic: Biology, Biotechnology - Principles and Processes, NEET, NEET 2011 (Screening)
There is a rough black spot on a polished metallic plate. If the plate is heated up to 1400 K (approximately) and then at once taken in a dark room, then

Options:
A in comparison with the plate, the spot will shine more
B in camparison with the plate, the spot will appear more black
C the spot and the plate will be equally bright
D the plate and the black spot cannot be seen in the dark room

The correct answer is:
in comparison with the plate, the spot will shine more

Solution:
Good absorbers are good radiators and bad absorbers are bad radiators. The black spot on heating absorbs radiations and so emits them in the dark room while the polished shining part reflects radiation and absorbs nothing and so does not emit radiations and becomes invisible in the dark.

Topic: Physics, Thermal Properties of Matter, NEET
There is a stream of neutrons with a kinetic energy of 0.0327 eV. If the half life of neutron is 700 second, what fraction of neutrons will decay before they travel a distance of 10 m? Given mass of neutron = 1.675 × 10–27 kg.

Options:
A 3.96 Ã 10â6
B 3.90 × 10–6
C 3.85 × 10–6
D 4.86 × 10–6

The correct answer is:
3.96 × 10–6

Solution:
From the given kinetic energy of the neutrons we first calculate their velocity. Thus
1 2 mv 2 = 0 . 0 3 2 7 Ã 1 . 6 Ã 1 0 - 1 9
â´ vâ¡ 2 = 2 Ã 0 . 0 3 2 7 Ã 1 . 6 Ã 1 0 - 1 9 1 . 6 7 5 Ã 1 0 - 2 7 = 6 2 5 Ã 1 0 4
or v = 2500 m/s
With this speed, the time taken by the neutrons to travel a distance of 10 m is,
Î t = 1 0 2 5 0 0 = 4 Ã 1 0 - 3 sâ¡
The fraction of neutrons decayed in time Ît second is,
Î Nâ¡ Nâ¡ = Î» Î t
Also, Î» = 0 . 6 9 3 Tâ¡ 1 / 2
â´ Î Nâ¡ Nâ¡ = 0 . 6 9 3 Tâ¡ 1 / 2 Î t = 0 . 6 9 3 7 0 0 Ã 4 Ã 1 0 - 3 = 3 . 9 6 Ã 1 0 - 6

Topic: Physics, Nuclear Physics, NEET
There is a tRNA with anticodon UAC. If we apply the wobble hypothesis, then this tRNA can decode which of these codons?

Options:
A It can decode AUG,AUC, AUU, AUA
B It can decode AUG and AUC but not AUU and AUA
C It can decode AUG but not AUC, AUU and AUA
D It cannot decode any one of these codons AUG, AUC, AUU and AUA

The correct answer is:
It can decode AUG but not AUC, AUU and AUA

Solution:
The tRNA having anticodon UAC would definitely decode AUG. It carries amino acid methionine. The other codons AUU, AUC, AUA code for amino acid isoleucine. The tRNA will not be able to decode these codons which code for isoleucine.

Topic: Biology, Molecular Basis of Inheritance, NEET
There is a valve present at the junction of

Options:
A oesophagus and stomach
B stomach and duodenum
C ileum and caecum
D ileum and jejunum

The correct answer is:
ileum and caecum

Solution:
Small intestine consists of three parts: C Shaped duodenum, Jejunum and ileum. Ileum then continues as large intestine. The parts of large intestine are caecum, colon and rectum. Thus ileum is connected to the caecal part of large intestine. There is a valve seen here and is known as ileocaecal valve as this prevents backflow of matter once it has entered the caecum.

Topic: Biology, Digestion and Absorption, NEET
There is an unknown quantity x=Rl100-l, here l is length ( in cm ) measured using a scale having least count of 1 cm. and R is a quantity known accurately. Find the percentage error in measurement of x for l=50 cm ?

Options:
A 1 %
B 6 %
C 2 %
D 4 %

The correct answer is:
4 %

Solution:
x=Rℓ100-ℓ

Δxx=Δℓℓ+Δℓ100-ℓ

Δxx×100=150+150×100=4%

Topic: Physics, Experimental Physics, NEET
There is no d-d transition in Cu+ but Cu2O is coloured due to

Options:
A The presence of unpaired electron
B The presence of coloured O2- ion
C Charge transfer from oxygen to metal
D Charge transfer from metal to oxygen

The correct answer is:
Charge transfer from oxygen to metal

Solution:
There is no d-d transition in Cu+ because d- orbital is completely filled, but Cu2O is coloured due to charge transfer from oxygen to metal which can undergo an electronic transition into an excited electronic state.

Topic: Chemistry, Coordination Compounds, NEET
There is no DNA in

Options:
A an enucleated ovum
B mature RBCs
C a mature spermatozoan
D hair root

The correct answer is:
mature RBCs

Solution:
The chromatin material inside the nucleus is composed of DNA, some proteins and RNA. Infact it is DNA-protein complex basically. Thus, in an enucleated ovum, DNA will be absent.
The mature RBCs, mature spermatozoan and root hair are nucleated, thus, contain DNA.

Topic: Biology, Human Reproduction, NEET, NEET 2009 (Screening)
There is no DNA in

Options:
A

mature RBC.

B

mature spermatozoan.

C

root hair.

D

antipodal cells.

The correct answer is:

mature RBC.

Solution:
Red blood cells are the most common type of blood cell and delivering oxygen to the body tissues via the blood. There is no DNA in mature RBC. The reticulocyte is the immediate precursor of the mature RBC and, within 24 hours of release into the peripheral circulation, evolves into the mature RBC and losses its nucleus.

Topic: Biology, Body Fluids and Circulation, NEET
There is no life on Moon due to the absence of:

Options:
A oxygen
B water
C light
D temperature

The correct answer is:
water

Solution:
There is no life on the Moon because of the absence of atmosphere and water on it. Since the Moon has no atmosphere, it experiences extreme temperatures. During the day time, the temperature may be as high as $127^{\circ} \mathrm{C}$ and it can drop down to $-173^{\circ} \mathrm{C}$. Further, due to the absence of atmosphere, there is no weather, wind, clouds, rain and water on the Moon.
Related Theory:-
After the Earth, Mars is the most habitable planet in our solar system soil contains water to extract and temperature range is not too extreme. There is enough sunlight and Gravity 38% that of our Earth's. It has an atmosphere that offers protection from cosmic and the Sun's radiation. Also, the day/night rhythm is very similar to ours here on Earth i.e., 24 hours, 39 minutes and 35 seconds

Topic: Biology, Ecosystem, NEET, NEET 2002
There were four dormant seeds with their own reasons of dormancy. Help them grow by breaking their dormancy.

Cause of dormancy	Way to overcome

1. Impermeable seed coat	i. Changing the environment.

2. Double dormancy	ii. Scarification

3. Dry seed	iii. Cold, moist storage for 4-12 weeks

4. Immature Embryo	iv. Abrasion of seed coat and stratification

Options:
A 1-ii,Â 2-iii,Â 3-i,Â 4-iv
B 1-iv,Â 2-ii,Â 3-I,Â 4-iii
C 1-iii, 2-iv, 3-i, 4-ii
D 1-ii, 2-iv, 3-i, 4-iii

The correct answer is:
1-ii, 2-iv, 3-i, 4-iii

Solution:
Scarification is the process of weakening, opening or altering the coat of seed to encourage germination, therefore the impermeable seed coat is overcome by scarification.
Double dormancy involves two reasons of dormancy which has to be overcome. They are usually : hard seed coat and immature embryo which can be overcome by abrasion of the seed coat and stratification.
Dry seed can be overcome by growing it in a moist environment.
Embryo rest means when the embryo is immature to grow and that can be overcome by stratification which means storing it in moist cold storage for few weeks.

Topic: Biology, Plant - Growth and Development, NEET
Thermal stability of BaCO3,  CaCO3 and MgCO3 is

Options:
A BaCO3>CaCO3>MgCO3
B BaCO3>MgCO3>CaCO3
C CaCO3>MgCO3>BaCO3
D MgCO3>CaCO3>BaCO3

The correct answer is:
BaCO3>CaCO3>MgCO3

Solution:
(i) More be the ionic nature, more be the attractive force between the species.
(ii) More be the attractive force, More be the thermal stability.
(iii) Ionic character for the same anionic species, increases down the group.
Thus, correct order for thermal-stability is
BaCO3>CaCO3>MgCO3

Topic: Chemistry, s Block Elements, NEET
Thermodynamic feasibility of the reaction alone cannot decide the rate of the reaction. Explain with the help of one example.

Options:
A Thermodynamic feasibility is solely responsible for determining the rate of a reaction.
B The rate of a reaction is directly proportional to the thermodynamic feasibility.
C Thermodynamically the conversion of diamond to graphite is highly feasible but this reaction is very slow because its activation energy is high.
D Thermodynamics and reaction kinetics are unrelated concepts and do not affect each other.

The correct answer is:
Thermodynamically the conversion of diamond to graphite is highly feasible but this reaction is very slow because its activation energy is high.

Solution:
Correct Option is : (C)
Thermodynamically the conversion of diamond to graphite is highly feasible but this reaction is very slow because its activation energy is high.

Topic: Chemistry, Chemical Kinetics, NEET
Thermodynamic processes are indicated in the following diagram.
Match the following

Column – 1	Column - 2

P. Process I	a. Adiabatic

Q. Process II	b. Isobaric

R. Process III	c. Isochoric

S. Process IV	d. Isothermal

Options:
A P→a, Q→c, R→d, S→b
B P→c, Q→a, R→d, S→b
C P→c, Q→d, R→b, S→a
D P→d, Q→b, R→a, S→c

The correct answer is:
P→c, Q→a, R→d, S→b

Solution:
Process I \(\rightarrow\) Volume constant \(\rightarrow\) Isochoric
Process II \(\rightarrow\) Adiabatic (Slope of an adiabatic process is more than isothermal process)
Process III \(\rightarrow\) Temperature constant \(\rightarrow\) Isothermal
Process IV \(\rightarrow\) Pressure constant \(\rightarrow\) Isobaric

Topic: Physics, Thermodynamics, NEET, NEET 2017
Thermodynamically the most stable form of carbon is

Options:
A diamond
B graphite
C fullerenes
D coal

The correct answer is:
graphite

Solution:
Correct Option is : (B)
graphite

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Thermostable DNA polymerase used in PCR was isolated from :

Options:
A Agrobacterium tumifaciens
B Bacillus thuringiensis
C Thermus aquaticus
D Escherichia coli

The correct answer is:
Thermus aquaticus

Solution:
Option (3) is the answer, because Thermostable DNA polymerase (Taq polymerase) used in PCR was isolated from a bacterium Thermus aquaticus.
Option (1) is not the answer as Agrobacterium tumifaciens is a pathogen of several dicot plants.
Option (2) is not the answer as, specific Bt toxin genes were isolated from Bacillus thuringiensis and incorporated into the several crop plants for the development of pest resistant crops.
E. Coli was used as a host by Eli lily to produce human insulin.

Topic: Biology, Biotechnology - Principles and Processes, NEET, NEET 2023 (Manipur)
These are ductless glands which liberate their secretions into the bloodstream, conveying it to target organs located at a distance are called ___.

Options:
A Exocrine gland
B Endocrine gland
C Hormone
D None of the above

The correct answer is:
Endocrine gland

Solution:
These are ductless glands which liberate their secretions into the bloodstream, conveying it to target organs located at a distance are called endocrine glands

Topic: Biology, Chemical Coordination and Integration, NEET
These are regarded as major causes of biodiversity loss:
A. Over exploitation
B. Co-extinction
C. Mutation
D. Habitat loss and fragmentation
E. Migration
Choose the correct option:

Options:
A A, B, C and D only
B A, B and E only
C A. B and D only
D A, C and D only

The correct answer is:
A. B and D only

Solution:
Major causes of biodiversity losses are
(1) Over-exploitation
(2) Alien species invasions
(3) Co-extinctions
(4) Habitat loss and fragmentation
Hence correct option is A, B and D only.

Topic: Biology, Biodiversity and its Conservation, NEET, NEET 2024
These are two opposing views about the origin of modern man. According to one view, Homo erectus in Asia were the ancestors of modern man. A study of variation of DNA, however, suggested African origin of modern man. What kind of observation on DNA variation could suggest this?

Options:
A Greater variation in Asia than in Africa
B Greater variation in Africa than in Asia
C Similar variation in Africa and Asia
D Variation only in Asia and no variation in Africa

The correct answer is:
Greater variation in Africa than in Asia

Solution:
Genetic studies and fossil evidence show that archaic Homo sapiens evolved to anatomically modern humans solely in Africa, between 200,000 and 60,000 years ago, that members of one branch of Homo sapiens left Africa by between 125,000 and 60,000 years ago, and that over time these humans replaced earlier human populations such as Neanderthals and Homo erectus. The date of the earliest successful "out of Africa" migration has generally been placed at 60,000 years ago as suggested by genetics, although migration out of the continent may have taken place as early as 125,000 years ago according to Arabian archaeology finds of tools in the region. In contrast, the “Out of Africa Model “asserts that modern humans evolved relatively recently in Africa, migrated into Eurasia and replaced all populations which had descended from Homo erectus.

Topic: Biology, Evolution, NEET
These floral characters are of a specific family. Identify the plant which shows the following characters.

1. Flower-bisexual, zygomorphic

2. Corolla-vexillary aestivation

3. Androecium-diadelphous

4. Gynoecium-ovary superior

5. Seed-Non-endospermic

Options:
A Petunia
B Colchicum
C Indigofera
D Belladona

The correct answer is:
Indigofera

Solution:
Vexillary aestivation and diadelphous stamens are two important characteristics of members of Fabaceae family. Indigofera commonly called as neel is a dye which is a member of Fabaceae family.

Topic: Biology, Morphology of Flowering Plants, NEET
These microbes consume the major part of the organic matter in the effluent, significantly reducing the BOD of the effluent.
What is the BOD test?

Options:
A A measure of the rate of uptake of oxygen by micro-organisms in a sample of water
B A measure of the organic matter present in the water
C A measure of the pollution potential of waste water
D A measure of the physical removal of particles

The correct answer is:
A measure of the rate of uptake of oxygen by micro-organisms in a sample of water

Solution:
The BOD test measures the rate of uptake of oxygen by micro-organisms in a sample of water and, thus, indirectly, BOD is a measure of the organic matter present in the water.

Topic: Biology, Microbes in Human Welfare, NEET
They have organ system level of organsiation,bilaterally symmetrical,triploblastic animals , they belong from the largest phylum. Name the phylum?

Options:
A Arthropoda
B Mollusca
C Annelida
D Aschelminthes

The correct answer is:
Arthropoda

Solution:
Arthropoda is the largest phylum of Animalia includes insects , over two- thirds of all named species on earth .

Topic: Biology, Animal Kingdom, NEET
Thin filament of myofibril contains 2'F' actions and two other proteins named ___ and ___

Options:
A Troponin, tropomyosin
B tropomyosin, tronin
C tropomyosin, tropomyosin
D troponin, troponin

The correct answer is:
Troponin, tropomyosin

Solution:
Thin filament of myofibril contains 2'F' actions and two other proteins named troponin and tropomyosin

Topic: Biology, Locomotion and Movement, NEET
Thiobacillus is a group of bacteria helpful in carrying out:

Options:
A Nitrogen fixation
B Chemoautotrophic fixation
C Nitrification
D Denitrification

The correct answer is:
Denitrification

Solution:
Thiobacillus denitrificans, Micrococcus denitrificans, and some species of Serratia, Pseudomonas, and Achromobacter are implicated as denitrifiers. Pseudomonas aeruginosa can, under anaerobic conditions (as in swampy or water-logged soils), reduce the amount of fixed nitrogen (as fertilizer) by up to 50 percent.

Topic: Biology, Mineral Nutrition, NEET, NEET 2019 (All India)
Thiol group is present in

Options:
A Methionine
B Cytosine
C Glycine
D Cysteine

The correct answer is:
Cysteine

Solution:
Among 20 naturally occurring amino acids Cysteine has âSH or thiol functional group.
General formula of amino acid

Value of R=-CH2-SH in cystenine.

Topic: Chemistry, Biomolecules, NEET
Thirteen resistances each of resistance R Î© are connected in the circuit, as shown in the figure. The effective resistance between A and B is

Options:
A 2R Ω
B 4R3 Ω
C 2R3 Î©
D R Ω

The correct answer is:
2R3 Î©

Solution:
From symmetry, we get the following circuit diagram for half circuit,
For half circuit, Râ²=R3.
Req=2R3

Topic: Physics, Current Electricity, NEET