datavorous/entrance-exam-dataset huggingface dataset:
Table-tennis ball has a mass of 10 g and a speed of 90 m/s. If speed can be measured within an accuracy of 4%, what will be the uncertainty in speed and position?

Options:
A Uncertainty in speed = 3.6 m/s, Uncertainty in position = 3.24 × 10-34m
B Uncertainty in speed = 36 m/s, Uncertainty in position = 1.46 × 10-33m
C Uncertainty in speed = 0.36 m/s, Uncertainty in position = 1.26 × 10-34m
D Uncertainty in speed = 0.36 m/s, Uncertainty in position = 3.24 × 10-34m

The correct answer is:
Uncertainty in speed = 36 m/s, Uncertainty in position = 1.46 × 10-33m

Solution:
Correct Option is : (B)
Uncertainty in speed = 36 m/s, Uncertainty in position = 1.46 × 10-33m

Topic: Chemistry, Structure of Atom, NEET
Take, bulk modulus of water B=2100 MPa. What increase in pressure is required to decrease the volume of 200 litres of water by 0.004 percent?

Options:
A 210  kPa
B 840  kPa
C 8400  kPa
D 84  kPa

The correct answer is:
84  kPa

Solution:
Given,
Bulk modulus of water B=2100 MPa
=2100Ã106 Pa
We know that,
ÎP=B-ÎVV
Here, âVVÃ100
âVV=0.004100
ΔP =2100Ã106Ã0.004100
=2100Ã106Ã41000Ã100
=8400Ã106105
=84000 Pa
=84 kPa

Topic: Physics, Mechanical Properties of Solids, NEET
Taking into account of the significant figures, what is the value of 9.99 m–0.0099 m?

Options:
A 9.98 m
B 9.980 m
C 9.9 m
D 9.9801 m

The correct answer is:
9.98 m

Solution:
In subtraction the number of decimal places in the result should be equal to the number of decimal places of that term in the operation which contain lesser number of decimal places.

9.99−0.00999.98

⇒3 siginificant figures

Topic: Physics, Mathematics in Physics, NEET, NEET 2020 (Phase 1)
Taking stability as the factor, which one of the following represent the correct relationship?

Options:
A TlI>TlI3
B TlCl3>TlCl
C InI3>InI
D AlCl>AlCl3

The correct answer is:
TlI>TlI3

Solution:
Due to the inert pair effect, +1 state stability increases down the group and +3 state stability decreases down the group. Hence, Tl+ is more stable than Tl3+. Hence, TlI is more stable than TlI3.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET, NEET 2023 (All India)
Taking the wavelength of first Balmer line in the hydrogen spectrum n=3 to n=2 as 660 nm, then the wavelength of 2nd Balmer line in the same spectrum n=4 to n=2 will be

Options:
A 488.9 nm
B 388.9 nm
C 889.2 nm
D 642.7 nm

The correct answer is:
488.9 nm

Solution:
1λ1=R122-132=536R

1λ2=R122-142=R316

λ2λ1=5R/363R/16=536×163

λ2=536×163×660=488.9nm

Topic: Physics, Atomic Physics, NEET
Tapetal cells of stamens are:

Options:
A Tetraploid binucleate
B Diploid uninucleate
C Hexaploid tetranucleate
D Polyploid multinucleate

The correct answer is:
Polyploid multinucleate

Solution:
It is the innermost layer of the anther wall. The tapetum is a specialized layer of nutritive cells found within the anther of flowering plants, where it is located between the sporogenous tissue and the anther wall. Tapetum is important for the nutrition and development of pollen grains; it is also a source of precursors for the pollen coat.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Tasmanian wolf resembles the placental wolf, this represents

Options:
A parallel evolution
B divergent evolution
C co-extinction
D atavism

The correct answer is:
parallel evolution

Solution:
Natural selection can lead to similar adaptation for survival in similar habitats. This form of evolutionary change is called convergent or parallel evolution. For example, some of the marsupials of Australia resemble equivalent placental mammals that live in similar habitats of other continents, like the Tasmanian wolf resembles the placental wolf.

Topic: Biology, Evolution, NEET
Taxonomy based on the determination of evolutionary relationship is

Options:
A Cytotaxonomy
B Numerical taxonomy
C Biochemical taxonomy
D Phylogenetic taxonomy

The correct answer is:
Phylogenetic taxonomy

Solution:
Phylogenetic classification systems are based on the evolutionary relationships between the various organisms.

Topic: Biology, Plant Kingdom, NEET
Taxonomy refers to

Options:
A Plant classification
B Plant nomenclature
C Plant affinity
D All of these

The correct answer is:
All of these

Solution:
Taxonomy is the branch of science concerned with classification, identification and nomenclature. The term is derived from the Greek taxis (“arrangement”) and nomos (“law”). Taxonomy is, therefore, the methodology and principles of systematic botany and zoology and sets up arrangements of the kinds of plants and animals in hierarchies of superior and subordinate groups. Among biologists the Linnaean system of binomial nomenclature, created by Swedish naturalist Carolus Linnaeus in the 1750s, is internationally accepted.

Topic: Biology, The Living World, NEET
"Taxonomy without phylogeny is similar to bones without flesh" is the statement of

Options:
A Oswald Tippo
B John Hutchinson
C Takhtajan
D Bentham and Hooker

The correct answer is:
Takhtajan

Solution:
Armen Leonovich Takhtajan gave the statement "Taxonomy without phylogeny is similar to bones without flesh"

Topic: Biology, Biological Classification, NEET
Taylor and his colleagues proved the semi-conservative model of replication by performing experiments on ........(a)........... using .........(b).........

Options:
A

(a)	(b)

Bacteriophage	radioactive thymidine

B

(a)	(b)

E. coli	radioactive nitrogen

C

(a)	(b)

Vicia faba	radioactive thymidine

D

(a)	(b)

E. coli	heavy nitrogen

The correct answer is:

(a)	(b)

Vicia faba	radioactive thymidine

Solution:
Experiments involving use of radioactive thymidine to detect the distribution of newly synthesised DNA in the chromosomes was performed on Vicia faba (faba beans) by Taylor and colleagues in 1958. The experiments proved that the DNA in chromosomes also replicate semiconservatively.

Topic: Biology, Molecular Basis of Inheritance, NEET
Taylor conducted the experiments to prove the semiconservative mode of chromosome replication on:

Options:
A Vinca rosea
B Vicia faba
C Drosophila melanogaster
D E. coli

The correct answer is:
Vicia faba

Solution:
Matthew Meselson and Franklin Stahl (1958) performed following experiment using heavy nitrogen (15N) in E. coli to prove semi-conservative model of DNA replication. Taylor et. al proved semi-conservative mode of chromosome replication in eukaryotes using tritiated thymidine (3H - thymidine) in root of Vicia faba (Faba beans).

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2016 (Phase 2)
Taylor is heterozygous for two autosomal gene pair (CcDd). He is also colour-blind. What is the probability of gametes having c, d and colour-blind genes?

Options:
A 12
B 14
C 18
D 116

The correct answer is:
18

Solution:
The genotype of Taylor would be:
CcDdXcy - Taylor

Gametes=cdXc=12Ã12Ã12
=18

Topic: Biology, Principles of Inheritance and Variation, NEET
Techniques to alter the genetic material (DNA and RNA) is known as

Options:
A Bio-medical engineering
B Environmental engineering
C Genetic engineering
D Bioprocessing engineering

The correct answer is:
Genetic engineering

Solution:
Genetic engineering is known as recombinant DNA technology is used to alter the chemistry of genetic material DNA or RNA and to introduce in the host cells to change the genotype and thus phenotype of an organism.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Tegmina in cockroach, arises from:

Options:
A Mesothorax
B Metathorax
C Prothorax and Mesothorax
D Prothorax

The correct answer is:
Mesothorax

Solution:
Two pairs of wings, forewings, and hindwings are present on the dorsal side. Forewings are the first pair of dark, opaque, thick, leathery wings that are protective in function. Hindwings are thin, broad, membranous, delicate, and transparent. These are attached to the tergum of the metathorax. These are helpful in flight and hence are also called true wings

Tegmina is the forewing of cockroaches and is called mesothoracic due to its origin.

Topic: Biology, Structural Organisation in Animals, NEET, NEET 2022 (Phase 1)
Telomerase is an enzyme which is a:

Options:
A simple protein
B RNA
C ribonucleoprotein
D repetitive DNA.

The correct answer is:
ribonucleoprotein

Solution:
Telomerase is an ribonucleoprotein enzyme that works as a cellular reverse transcriptase that adds DNA in the chromosomal. It involves the protection of chromosome endings from getting shorter during replication of DNA to avoid the loss of catastrophic DNA.
Related Theory
Telomerase is a ribonucleoprotein molecule that is enzymatic in nature. It uses a special mechanism for the synthesis of DNA at telomeric ends. The DNA repeat sequence of telomere has one $G$-rich strand and other $C$ rich strand. The G-rich strand has a single stranded overhand. This overhand works as a primer and for its elongation uses as template the RNA component of telomerase enzyme. Thus, telomerase synthesizes only the G-rich strand of telomeres.

Topic: Biology, Biomolecules (B), NEET, NEET 2005
Telomere repetitive DNA sequences control the function of eukaryotic chromosomes because they:

Options:
A are RNA transcription initiator
B help chromosome pairing
C prevent chromosome loss
D act as replicons.

The correct answer is:
prevent chromosome loss

Solution:
The terminal end of the chromosome is known as a telomere. It consists of repetitive DNA sequences. These are stable and resistant to exonuclease digestion and hence essential for chromosome stability.

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2007
Temperature at which the kinetic energy of gas molecule is half of the value of kinetic energy at 27Â°C is

Options:
A 13.5°C
B 150°C
C 75 K
D â123Â°C

The correct answer is:
−123°C

Solution:
Kinetic energy of a gas molecule
E=32kT
where k is Boltzmann's constant.
â´ EâT
or E1E2=T1T2 or E(E/2)=300T2
or T2=150 K
T2=150-273=-123â

Topic: Physics, Kinetic Theory of Gases, NEET
Temperature of 100 gm water is changed from 0 Â°C to 3 Â°C. In this process, heat supplied to water will be (specified heat of water = 1 cal g-1 Â°C-1)

Options:
A Equal to 300 cal
B Greater than 300 cal
C Less than 300 cal
D Data is insufficient

The correct answer is:
Less than 300 cal

Solution:
As density of water increases up to 4 Â°C,

âV = -ve

ââW = -ve and âU = 300 cal

By, âQ = âU + âW,

âQ< 300 cal.

Topic: Physics, Thermal Properties of Matter, NEET
Temporary hardness is caused due to the presence of -

Options:
A CaSO4
B CaCl2
C CaCO3
D Ca(HCO3)2

The correct answer is:
Ca(HCO3)2

Solution:
Temporary hardness is caused by bicarbonates of calcium and magnesium.

Topic: Chemistry, s Block Elements, NEET
Ten E. coli cells with N15-dsDNA are incubated in medium containing N14 nucleotide. After 60 minutes, how many E. coli cells will have DNA totally free from N15?

Options:
A 40 cells
B 60 cells
C 80 cells
D 20 cells

The correct answer is:
60 cells

Solution:
E. coli has a doubling time of 20 minutes. Thus, in 60 minutes, there would be 3 cycles of doubling. That means, after 60 minutes, there would be 80 E. coli cells, if we start from 10 initial cells.

In the first cycle, all 20 cells would be hybrid DNA containing N15/N14 state. The second cycle would yield some 40 cells and out of those, 20 cells would be totally free from N15 DNA. In the last cycle, there would be 80 cells created and 60 would have N14/N14 state and only 20 cells would have N15/N14 state.

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2022 (Phase 1)
Ten identical cells connected in series are needed to heat a wire of length one meter and radius ' $r$ ' by $10^{\circ} \mathrm{C}$ in time ' $t$ '. How many cells will be required to heat the wirc of length two meter of the same radius by the same temperature in time 'r'?

Options:
A 20
B 30
C 40
D 10

The correct answer is:
20

Solution:
Let $\rho=$ resistivity of the material of wire
$r=$ radius of wire
$\therefore$ Resistance of $1 \mathrm{~m}$ wire is $R=\frac{\rho}{\pi r^2}$
$$
\left\{\because R=\frac{\rho l}{A}\right\}
$$
Let $\varepsilon=e m f$ of the cell in first case.
All the cells are connected in series.
So heat is $m s \Delta T=\frac{(106)^2}{R} t$
In $2^{\mathrm{nd}}$ case
Resistance of some wire of length 2 $\mathrm{m}$ is :
$$
R^{\prime}=\frac{\rho(2)}{\pi r^2}=\frac{2 \rho}{\pi r^2}=2 R
$$
and then heat is :
$$
(2 \mathrm{~m}) \mathrm{S} \Delta \mathrm{T}=\frac{(\mathrm{n} \varepsilon)^2 t}{2 R}
$$
From eq. (i) and (ii)
$$
\begin{aligned}
\frac{n^2}{200} & =2 \\
\Rightarrow \quad n^2 & =400 \Rightarrow n=20
\end{aligned}
$$

Topic: Physics, Current Electricity, NEET, NEET 2013 (Karnataka)
Tendon is made up of

Options:
A Adipose tissue
B Modified white fibrous tissue
C Areolar tissue
D Yellow fibrous connective tissue

The correct answer is:
Modified white fibrous tissue

Solution:
Tendons are made of inelastic white fibrous connective tissue. A tendon (or sinew) is a tough band of fibrous connective tissue that connects muscle to bone or muscle to muscle and is designed to withstand tension. Tendons are similar to ligaments except that ligaments join one bone to another. Tendons and muscles work together and can only exert a pulling force.

Topic: Biology, Structural Organisation in Animals, NEET
Tendons attach bones to muscles and ligaments attach one bone to another. They are examples of

Options:
A Areolar tissue
B Dense regular tissue
C Adipose tissue
D Dense irregular tissue

The correct answer is:
Dense regular tissue

Solution:
In the dense regular connective tissues, the collagen fibres are present in rows between many parallel bundles of fibres. Tendons, which attach skeletal muscles to bones and ligaments which attach one bone to another are examples of this tissue.

Topic: Biology, Structural Organisation in Animals, NEET
Tendons

Options:
A Connect muscle to bone and are made up of dense regular connective tissue
B Connect bone to bone and are made up of dense regular connective tissue
C Connect muscle to bone and are made up of dense irregular connective tissue
D Connect bone to bone and are made up of dense irregular connective tissue

The correct answer is:
Connect muscle to bone and are made up of dense regular connective tissue

Solution:
Tendons are short inelastic cords of connective tissue that connect muscle to bone. They are made up of dense regular connective tissue. They have collagen fibres arranged parallelly. There may be ossification within some tendons to form sesamoid bones, such as patella bone which is formed in the tendon of quadriceps femoris.

Topic: Biology, Structural Organisation in Animals, NEET
Term genome/nucleoid can be used for:

Options:
A Bacteria and Mycoplasma
B Cyanobacteria and Bacteria
C Archaebacteria and Blue-green algae
D all of the above

The correct answer is:
all of the above

Solution:
In prokaryotic cells, the nucleus is in primitive form. In this nucleus nuclear membrane and histone proteins are absent, so the nucleus is present in scattered form. This nucleus is called the incipient nucleus/nucleoid/genophore. Bacteria, mycoplasma, archaebacteria, and cyanobacteria (Blue-green algae) all are prokaryotes with primitive nucleus.

Topic: Biology, Biological Classification, NEET
Term "virion'' is used for

Options:
A mycoplasma colony
B single virus
C group of viruses
D cancerous cells

The correct answer is:
single virus

Solution:
Viruses lack cellular organization, they can survive only inside living host cell thus are called an obligate intracellular parasite, they cannot be cultured in an artificial medium. A virion is an agent that infects living organisms, often causing disease.

Topic: Biology, Biological Classification, NEET
Terminal cytochrome of respiratory chain which donates electrons to oxygen is

Options:
A Cyt b
B Cyt c
C Cyt a 1
D Cyt a3 .

The correct answer is:
Cyt a3 .

Solution:
Cytochrome a3 helps in transfer of electron to oxygen. Complex IV of ETS consists of Cytochrome a, cytochrome a3 and enzyme cytochrome oxidase which transfers electron to terminal electron acceptor oxygen. The oxygen has great affinity to accept the electrons and in presence of protons a water molecule is formed.

Topic: Biology, Respiration in Plants, NEET
Terminal speed of 2 cm radius ball in a viscous liquid is 20 cm s-1. Then the speed of 1 cm radius ball in the same liquid is

Options:
A 5 cm s-1
B 10 cm s-1
C 40 cm s-1
D 80 cm s-1

The correct answer is:
5 cm s-1

Solution:
Terminal velocity, v=2r2(ρ-ρ0)g9 η
ie, v∝r2
∴v1v=r12r2
Or v1=vr1r2
=20 122=5 cm s-1

Topic: Physics, Mechanical Properties of Fluids, NEET
Terminal velocity v of a spherical object varies with a radius of object r as -

Options:
A

B

C

D

The correct answer is:

Solution:
When sphere dropped through a tube full of viscus liquid acquires constant velocity, it is called terminal velocity
v=2r2Ï-Ïg9Î·âvâ r2
â´

Topic: Physics, Mechanical Properties of Fluids, NEET
Terms such as homothallic and monoecious are used to denote

Options:
A Bisexual condition
B Unisexual condition
C Both (a) and (b)
D None of these

The correct answer is:
Bisexual condition

Solution:
Plants may have both male and female reproductive structures in the same plant (bisexual) or on different plants (unisexual). In several fungi and plants, terms such as homothallic and monoecious are used to denote the bisexual condition, and heterothallic and dioecious are the terms used to describe the unisexual condition.

Topic: Biology, Biological Classification, NEET
tert-Butyl Bromide reacts with aq. NaOH by SN1 mechanism while n-butyl bromide reacts by SN2 mechanism. Why?

Options:
A As tert. Carbocation is highly stable so tert-butyl bromide follows SN1 mechanism.In case of n-butylbromide,primary carbocation is formed which is least stable so it does not follow SN1 mechanism. Here, steric hindrance is very less, so it follows SN2 mechanism.
B tert-Butyl Bromide forms a stronger bond with the nucleophile.
C n-Butyl bromide has a more stable carbocation intermediate.
D n-Butyl bromide has a more bulky structure.

The correct answer is:
As tert. Carbocation is highly stable so tert-butyl bromide follows SN1 mechanism.In case of n-butylbromide,primary carbocation is formed which is least stable so it does not follow SN1 mechanism. Here, steric hindrance is very less, so it follows SN2 mechanism.

Solution:
Correct Option is : (A)
As tert. Carbocation is highly stable so tert-butyl bromide follows SN1 mechanism.In case of n-butylbromide,primary carbocation is formed which is least stable so it does not follow SN1 mechanism. Here, steric hindrance is very less, so it follows SN2 mechanism.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Tertiary butyl alcohol gives tertiary butyl chloride on treatment with

Options:
A Conc. HCl/anhydrous ZnCl2
B KCN
C NaOCl
D Cl2

The correct answer is:
Conc. HCl/anhydrous ZnCl2

Solution:

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Terylene is a polymer obtained from

Options:
A Ethylene glycol and glycerol
B Ethylene glycol and glyceraldehydes
C Ethylene glycol and terephthalic acid
D None of the above

The correct answer is:
Ethylene glycol and terephthalic acid

Solution:
Ethylene glycol on reaction with terephthalic acid forms the polymer terylene(also known as Dacron or terene) which is used as synthetic fibre.
nHOCH 2 · CH 2 OH + nHOOC · C 6 H 4 · COOH → - nH 2 O - OCH 2 - CH 2 - O - C O || - C 6 H 4 - C O || - n Ethylene glycol Terephthalic acid Polymer Terylene

Topic: Chemistry, Polymers, NEET
Terylene is most commonly used for?

Options:
A blending with fibers
B Rope
C utensils
D Coverings

The correct answer is:
blending with fibers

Solution:
Correct Option is : 1
blending with fibers

Topic: Chemistry, Polymers, NEET
Test cross involves:

Options:
A crossing between two genotypes with dominant trait
B crossing between two genotypes with recessive trait
C crossing between two $\mathrm{F}_1$ hybrids
D crossing the $\mathrm{F}_1$ hybrid with a double recessive genotype

The correct answer is:
crossing the $\mathrm{F}_1$ hybrid with a double recessive genotype

Solution:
Test cross is a cross between an organism with unknown genotype and a recessive parent. It is used to determine whether an individual is homozygous or heterozygous for a trait.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2006
Test cross involves

Options:
A crossing between two genotypes with dominant trait.
B crossing between two genotypes with recessive trait.
C crossing between two F1 hybrids.
D crossing the F1 hybrid with a double recessive genotype.

The correct answer is:
crossing the F1 hybrid with a double recessive genotype.

Solution:
The cross between F1 hybrid and the recessive homozygous parent is called test cross. Test cross helps in identifying the genotype of an organism. Test cross helps in verifying the laws of inheritance. Test cross is also used to introduce useful recessive trait in the hybrids in rapid crop improvement programmes. Test cross is an easier and faster way for improving the variety of a crop. Test cross is of great help in the production of pure line varieties.

Topic: Biology, Principles of Inheritance and Variation, NEET
Test cross is when

Options:
A F1 crossed with heterozygous parent
B F1 crossed with homozygous dominant parent
C F1 crossed with homozygous recessive parent
D F1 crossed with homozygous parent

The correct answer is:
F1 crossed with homozygous recessive parent

Solution:
Test cross is the cross of F1 with its recessive parent. It is used to observed that the F1 is homozygous or heterozygous. It gives 1 : 1 ratio in monohybrid and 1 : 1 : 1 : 1 ratio in dihybrid cross.

Topic: Biology, Principles of Inheritance and Variation, NEET
Test tube baby means a baby born when:

Options:
A it is developed in a test tube
B it is developed through tissue culture method
C the ovum is fertilized externally and thereafter implanted in the uterus
D it develops from a non-fertilized uterus

The correct answer is:
the ovum is fertilized externally and thereafter implanted in the uterus

Solution:
Test tube baby is a method of in vitro fertilisation, which involves fertilizing an egg outside the body, in a laboratory dish, and then implanting it in a woman's uterus.
Related Theory
The only difference between a test tube baby and a normal baby is that test tube babies are born with the help of special fertility treatment, whereas normal babies born with the natural conception.

Topic: Biology, Reproductive Health, NEET, NEET 2003
Testosterone is synthesized by

Options:
A spermatogonial cells
B nurse cells
C interstitial cells
D seminiferous tubules

The correct answer is:
interstitial cells

Solution:
Testes are male gonads. These are present outside the abdominal cavity. The transverse section of the testes shows many lobules and each lobule consist of 1-3 seminiferous tubules. These tubules show the presence of two types of cells. Spermatogonia i.e. mother cells and Sertoli cells i.e. nurse cells that are present in between the spermatogonia. Spermatogonia form sperms while Sertoli cells nourish the sperms. In between the seminiferous tubules, there are present Leydig cells or interstitial cells that secrete male sex hormone testosterone.

Topic: Biology, Human Reproduction, NEET