datavorous/entrance-exam-dataset huggingface dataset:
Cave paintings by pre-historic humans can be seen at Bhimbetka rock shelter in Raisen district of Madhya Pradesh. Such pre-historic cave art developed about

Options:
A 18,000 years
B 24,000 years ago
C 53,000 years ago
D 10,000 years ago

The correct answer is:
18,000 years

Solution:
Pre-historic cave art developed about 18,000 years ago. One such cave paintings by Pre-historic humans can be seen at Bhimbetka rock shelter in Raisen district of Madhya Pradesh. Agriculture came around 10,000 years back and human settlements started.

Topic: Biology, Evolution, NEET
cDNA is synthesised from RNA by the enzyme

Options:
A RNA dependent RNA polymerase
B DNA dependent RNA synthetase
C DNA depending DNA convertase
D RNA dependent DNA polymerase

The correct answer is:
RNA dependent DNA polymerase

Solution:
DNA which is synthesized by RNA is called cDNA. cDNA is complementary DNA which is synthesized by enzyme RNA dependent DNA polymerase (reverse polymerase), this enzyme is present in a group of viruses commonly known as a retrovirus.

Topic: Biology, Molecular Basis of Inheritance, NEET
cDNA probes are copied from the mRNA molecules with the help of

Options:
A

Reverse transcriptase

B

DNA polyermase

C

Restriction enzymes

D

Adenosine deaminase

The correct answer is:

Reverse transcriptase

Solution:
cDNA (complementary DNA) probes are copied from the mRNA molecules with the help of reverse transcriptase.

Topic: Biology, Molecular Basis of Inheritance, NEET
CDRI is credited for developing

Options:
A Saheli
B Genetically engineered insulin
C MALA-D
D Vasectomy

The correct answer is:
Saheli

Solution:
Saheli or Centchroman is a type of oral contraceptive developed by the CDRI- Lucknow. It is to be taken on regular basis to avoid pregnancies. Consumption should be stopped if pregnancy is desired. It is a non steroidal based contraceptive to be taken once a week.

Topic: Biology, Reproductive Health, NEET
Cell A and B are adjacent to each other. Analyse the below table and choose the correct result.

Parameters	Cell A	Cell B

Osmotic pressure	10	8

Turgor pressure	8	4

Options:
A Water will move from Cell B to A
B Water will show no movement.
C Water will move from Cell A to B
D Solute will move across both the cells.

The correct answer is:
Water will move from Cell A to B

Solution:
In such problems, we must calculate the diffusion pressure deficit (DPD) of the cell A and B . Formula: DPD = OP - TP
DPD of cell A = 10 - 8 = 2. DPD of cell B = 8 - 4 = 4. Water will always move from a cell with lesser DPD to a cell with higher DPD value. That means the movement of water will occur from cell A to cell B .

Topic: Biology, Transport in Plants, NEET
Cell A with OP=6 and WP=5 is surrounded by the cells with OP=3 and TP=2 , what will be the direction of water movement?

Options:
A From A to other cells
B From other cells to A
C No movement
D Water will move up

The correct answer is:
No movement

Solution:
DPD is a diffusion pressure deficit and it is used to find out the direction of movement of water. The movement of water will take place from low DPD to high DPD and it can be calculated through given formula i.e.
DPD= Osmotic pressure-Turgor pressure

Cell A	Cell B

OP=6	OP=3

TP=WP=5	TP=WP=2

So DPD=6-5=1	DPD=3-2=1

The DPD of both the cells is coming equal. So there will be no movement of water.

Topic: Biology, Transport in Plants, NEET
Cell 'A' with O.P. = 10 atm and T.P. = 5 atm is in contact with a cell 'B' having O.P. = 15 atm and T.P. = 12 atm. The flow of water will be:

Options:
A From A to B
B Equal flow
C From B to A
D No flow

The correct answer is:
From B to A

Solution:
DPD = OP - TP. DPD determines the direction of movement of water between cells, movement of water occurs from cell having lower DPD to higher DPD.
DPD of A = OP - TP = 10 - 5 = 5 atm
DPD of B = OP - TP = 15 - 12 = 3 atm
Thus, water flows from B (low DPD) to A (high DPD).

Topic: Biology, Transport in Plants, NEET
Cell aggregate plan is found in:

Options:
A Cnidarians
B Sponges
C Roundworms
D Flatworms

The correct answer is:
Sponges

Solution:
The body consists of a cluster or aggregation of cells which have rudimentary differentiation but are not organized into tissues or organs. It is found in sponges. Such type of body organization is called cellular level of organization.

Topic: Biology, Animal Kingdom, NEET
Cell division or mitosis is a normal process in a living cell, but sudden and abnormal mitosis in an organ will frequently result in a

Options:
A Zygote
B Gastrula
C New organ
D Cancer

The correct answer is:
Cancer

Solution:
The cancer cells multiply by abnormal rapid and uncontrolled mitosis. Cancer is caused due to uncontrolled growth of the cells and forms from the extra mass tissue known as tumour. Generally, cancer is defined as uncontrolled proliferation of cells without any differentiation.

Topic: Biology, Cell Cycle and Cell Division, NEET
Cell elongation in internodal regions of the green plants takes place due to:

Options:
A indole acetic acid
B cytokinins
C gibberellins
D ethylene.

The correct answer is:
gibberellins

Solution:
Gibberellins are essential for many developmental processes in plants, including seed germination, stem elongation, leaf expansion, trichome development, pollen maturation and the induction of flowering. They are well known to cause cell elongation of intact plants in general and increase the internodal length of genetically dwarfed plants (e.g., Pea, Corn), in particular.
Caution
If auxins such as NAA are applied it retards the growth of internode, thus increases the number of dwarf shoots and thus the number of fruits.

Topic: Biology, Plant - Growth and Development, NEET, NEET 2004
Cell junctions are present in:

Options:
A Epithelial tissue
B Smooth muscle
C Cardiac muscle
D All of these

The correct answer is:
All of these

Solution:
Cell junctions are adhesions seen between neighbouring cells. These are basically protein structures that help the cells to communicate with each other. These are of various types. Tight junctions, gap junctions, desmosomes etc. These junctions are variously seen in epithelial tissues. Apart from epithelial tissues these are also seen in smooth muscles and cardiac muscles but are absent in skeletal muscles.

Topic: Biology, Structural Organisation in Animals, NEET
Cell wall is absent in:

Options:
A Funaria
B Mycoplasma
C Nostoc
D Aspergillus

The correct answer is:
Mycoplasma

Solution:
The mycoplasma is an organisms that completely lack a cell wall. They are the smallest living cells known and can survive without oxygen. Many mycoplasmas are pathogenic i.e. cause various diseases in plants (Pleuropneumonia), animals (witches broom) and human beings. These are pleomorphic (can change shape due to the absence of cell wall) and were called PPLO (Pleuropneumonia like organisms) or jokers of the plant kingdom. The bacterial structure is very simple but they are very complex in behaviour compared to many other organisms, bacteria as a group show the most extensive metabolic activity.

Topic: Biology, Cell - The Unit of Life, NEET, NEET 2015 (Phase 2)
Cell wall shows

Options:
A impermeability.
B semipermeability.
C complete permeability.
D differential permeability

The correct answer is:
complete permeability.

Solution:
The cell wall was first observed and named by Robert Hooke in 1665. It is a structural layer that surrounds some types of cells and situated outside the cell membrane. They provide cell structural support and protection. The cell wall in prokaryotes is made up of peptidoglycan and in eukaryotes, it is made up of polysaccharide and cellulose. The cell wall is completely permeable to water, molecules, and proteins.

Topic: Biology, Cell - The Unit of Life, NEET
Cell wall thickening, protoplasmic modification, and functional specialization are observed in which phase of growth?

Options:
A Phase of cell division
B Phase of elongation
C Phase of maturation
D Phase of growth

The correct answer is:
Phase of maturation

Solution:
The phase of maturation is the most important phase in which the cell becomes structurally and functionally specialized and differentiate to form a different type of cells and then tissue. Cell wall material deposition is the most important process which determines the functional specialty of the cell.

Topic: Biology, Plant - Growth and Development, NEET
Cells found in the hypodermal layer of dicot stem show all of these properties except

Options:
A possess thickened cell wall
B are dead at maturity
C possess vacuoles for storage of food
D have cell wall made up of cellulose, pectin and hemicellulose

The correct answer is:
are dead at maturity

Solution:
The collenchyma cells are polygonal or oval in shape. They have thickenings of pectin in the cell wall along with cellulose and hemicellulose. The collenchyma cells are found in the hypodermal layer of the dicot stem. These cells have negligible intercellular spaces due to pectin deposition. Collenchyma is said to be the living mechanical tissue.

Topic: Biology, Anatomy of Flowering Plants, NEET
Cells of maturation phase show

Options:
A Thickening of cell walls
B Protoplasmic modification
C Both A and B
D None of these

The correct answer is:
Both A and B

Solution:
Cells of maturation phase attain their maximal size in terms of wall thickening and protoplasmic modification. Cells in this phase become structurally and functionally specialized. Like xylem vessels loss protoplasm, the endodermal cell wall gets deposited with suberin.

Topic: Biology, Plant - Growth and Development, NEET
Cells of ________ tissue are living, show angular wall thickenings and provide mechanical support.

Options:
A xylem
B sclerenchyma
C collenchyma
D epidermis

The correct answer is:
collenchyma

Solution:
Collenchyma, part of the ground tissue, is a simple living tissue found in plants. Collenchyma layer is generally found below epidermis of the plant. They are either found in a patch manner or even distributed throughout. The cell wall of collenchyma tissue cells is thickened at corner due to higher deposition of cellulose, pectin and hemicellulose. The cells are generally spherical or polygonal in shape. This tissue provides mechanical support to the young stem and leaf.
Parenchyma is a type of simple permanent tissues forming a major component of the tissues of plant. These cells are in various shapes like oval, round, polygonal etc. with a thin cell wall made of cellulose. These cells perform functions like storage, photosynthesis, secretion.
The simple permanent tissue consisting of dead cells without protoplast is called sclerenchyma. These cells are long and narrow with lignified cell wall. The thick-walled, elongated pointed cells form the sclerenchyma fibres and the spherical, oval shaped cell with highly thickened cell wall and narrow cavity form the sclerenchyma sclereids.

Topic: Biology, Anatomy of Flowering Plants, NEET
Cells which are not dividing are likely to be at

Options:
A G
B G2
C G0
D S phase

The correct answer is:
G0

Solution:
These cells that do not divide further exit the G0 phase to enter an inactive stage called the quiescent stage (G0) of the cell cycle. The G0 stage of a cell denotes the exit of a cell from the cell cycle.

Topic: Biology, Cell Cycle and Cell Division, NEET
Cellular organelles with membranes are:

Options:
A Chromosomes, ribosomes and endoplasmic reticulum
B Endoplasmic reticulum, ribosomes and nuclei
C Lysosomes, Golgi apparatus and mitochondria
D Nuclei, ribosomes and mitochondria

The correct answer is:
Lysosomes, Golgi apparatus and mitochondria

Solution:
Lysosomes, Golgi apparatus and mitochondria are membrane bound organelles. Membrane-bound organelles are mostly found in eukaryotic cells, and they are found in majority numbers within the cytoplasm.

Topic: Biology, Cell - The Unit of Life, NEET, NEET 2015 (Phase 2)
Cellulose has very high degree of hydrophilicity because of

Options:
A Its amorphous nature
B Crystalline nature
C Presence of excessive voids in solid state
D Presence of many hydroxy groups on the polymer backbone

The correct answer is:
Presence of many hydroxy groups on the polymer backbone

Solution:
Cellulose is a polyhydroxy compound, containing several free hydroxy groups on its backbone capable of forming intermolecular H-bonds with water.

Topic: Chemistry, Polymers, NEET
Cellulose is a polymer of

Options:
A glucose
B fructose
C ribose
D sucrose

The correct answer is:
glucose

Solution:
Cellulose is a polymer of glucose-β-D(+) glucose units which are attached to each other by C1 to C4 bonds through β-glycosidic linkage in structure of cellulose.

Topic: Chemistry, Polymers, NEET
Cellulose is a polymer of:

Options:
A glucose
B fructose
C ribose
D sucrose

The correct answer is:
glucose

Solution:
Cellulose is a polymer of glucose $\beta-\mathrm{D}(+)$ glucose units are attached to each other by $\mathrm{Cl}$ to $\mathrm{C} 4$ bonds through p-glycosidic linkage in structure of cellulose.
Related Theory
Cellulose is a linear polysaccharide polymer with many glucose monosaccharide units. The acetal linkage is beta which makes it different from starch. This peculiar difference in acetal linkages results in a major difference in digestibility in humans.
Fructose is a monosaccharide that is found in fruits and vegetables. They have a fivemembered carbon ring and the general formula is $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6$. Insulin is a naturally occurring homopolymer of fructose which consists of 3-60 monomers.

Topic: Chemistry, Biomolecules, NEET, NEET 2002
Cellulose present in plants as a food for cattle but not for human beings because

Options:
A human body does not contain cellulase hence cellulase cannot be broken into D-glucose
B human saliva cannot break down plant cellulose in small pieces
C bile juice present in cattle helps them to digest cellulose
D human beings have a smaller stomach than cattle

The correct answer is:
human body does not contain cellulase hence cellulase cannot be broken into D-glucose

Solution:
The enzyme cellulase present in the stomach of cattle break cellulose into D-glucose and is easily digested. But, it is not present in the human body hence cellulose can not be broken down into D-glucose in human body and can not act as food for human beings.

Topic: Chemistry, Biomolecules, NEET
Central Drug Research Institute, which has developed the world's first non-steroidal oral contraceptive pill, is located at:

Options:
A Pune
B Lucknow
C New Delhi
D Mumbai

The correct answer is:
Lucknow

Solution:
Saheli [developed at Central Drug Research Institute (CDRI), Lucknow] is a non-steroidal oral contraceptive for the females and 'once a week' pill. Side effects are very few and the contraceptive value is high.

Topic: Biology, Reproductive Health, NEET
Cerebrum is divisible into left and right cerebral hemispheres by a

Options:
A Sulcus
B Gyrus
C Deep longitudinal cleft
D Corpus callosum

The correct answer is:
Deep longitudinal cleft

Solution:
The cerebrum forms the largest (or major) part of our human brain. The cerebrum is divisible into the left and right cerebral hemispheres by a deep longitudinal cleft. Corpus callosum is a tract of nerve fibres by which the hemispheres are connected with each other.

Topic: Biology, Neural Control and Coordination, NEET
Certain characteristic demographic features of developing countries are:

Options:
A high fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution
B high fertility, high density, rapidly rising mortality rate and a very young age distribution
C high infant mortality, low fertility, uneven population growth and a very young age distribution
D high mortality, high density, uneven population growth and a very old age distribution.

The correct answer is:
high fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution

Solution:
Developing countries show expanding population pyramid with maximum age distribution in prereproductive phase i.e., a very young age distribution, high fertility and low mortality rate.

Topic: Biology, Organisms and Populations, NEET, NEET 2004
Certain events of DNA replication and transcription are listed below. Identify the combination that is incorrect.

No.	Event	Transcription	DNA Replication

1	Adenine pairs with thymine	No	Yes

2	Both DNA polynucleotide chains act as templates	No	Yes

3	Uracil pairs with adenine	Yes	No

4	The original DNA molecule is changed after the process	Yes	No

Options:
A 1
B 2
C 3
D 4

The correct answer is:
4

Solution:
During DNA replication, the molecule is copied where both the strands are involved directly. Adenine pairs with thymine and the process is semi-conservative. The original strand is kept intact. During the transcription process, mRNA is synthesized from the template strand of DNA where uracil binds to adenine. Also, the template strand (original strand) is kept intact without any changes.

Topic: Biology, Molecular Basis of Inheritance, NEET
Certain genetic disorders show a higher proportion of males to be affected as compared to females that are affected. Such genetic disorders can arise due to

Options:
A Recessive character carried by Y-chromosomes
B Dominant character carried by Y-chromosome
C Dominant trait carried by X chromosome
D Recessive trait carried by X-chromosome

The correct answer is:
Recessive trait carried by X-chromosome

Solution:
Genetic disorders due to recessive genes present on the X-chromosome are more prevalent in males as compared to females because of the homozygous condition of males. In males, a single recessive able present on X-chromosome can cause the disease, while it requires both the alleles to be recessive in females for the symptoms to be visible.

Topic: Biology, Principles of Inheritance and Variation, NEET
Certain plants need to be exposed to a low temperature to hasten flowering later in life. This treatment is known as

Options:
A stratification
B scarification
C vernalisation
D photoperiodism

The correct answer is:
vernalisation

Solution:
Vernalisation is the phenomenon in which the flowering in plants is dependent on exposure to low temperatures. Vernalisation promotes flowering and enables the plant to have enough time to reach maturity. Stratification is a process which is used to break seed dormancy by providing it with the desirable conditions needed for the growth and scarification means braking of the tough exterior of the seed or weakening it to allow germination. Photoperiodism is the response of plants to the periods of day and night.

Topic: Biology, Plant - Growth and Development, NEET
Certain quantity of water cools from 70 oC to 60 oC in the first 5 minutes and to 54 oC in the next 5 minutes. The temperature of the surroundings is:

Options:
A 45 oC
B 20 oC
C 42 oC
D 10 oC

The correct answer is:
45 oC

Solution:
60-705=-K65-T
54-605-K57-T
-10-6=65-T57-T
285-5T=195-3T
90=2T
T=45o

Topic: Physics, Thermal Properties of Matter, NEET, NEET 2014
Certain species of wasps are seen to frequently visit flowering fig trees. The interaction between them is:

Options:
A

Brood parasitism

B

Mutualism

C

Commensalism

D

Parasitism

The correct answer is:

Mutualism

Solution:
Mutualism is the way two organisms of different species exist in a relationship in which each individual benefits. Similar interactions within a species are known as co-operation. The associations between tree roots and certain fungi Mycorrhiza is usually of mutual benefit (symbiotic): a delicate balance between the host plant and symbiont relations results in enhanced nutritional support for each member.

In this case, the female wasps use the fruit not only as oviposition (egg-laying) site but use the developing seeds within the fruit for nourishing its larvae. In turn, wasps help the plants in their pollination. In the favour of pollination, the fig offers the wasp some of its developing seeds.

Topic: Biology, Organisms and Populations, NEET
Certainly, here's the question with additional information: "The electrical resistance in ohms of a certain thermometer varies with temperature according to the approximate law: $R~=~{{R}_{0}}\left[ 1+\alpha \left( T-{{T}_{0}} \right) \right]$ The resistance is 101.6 Ω at the triple-point of water (273.16 K), and 165.5 Ω at the normal melting point of lead (600.5 K). Given this information, what is the temperature in Kelvin when the resistance of the thermometer is 123.4 Ω?

Options:
A 341.28 K
B 384.91 K
C 426.43 K
D 478.96 K

The correct answer is:
384.91 K

Solution:
Correct Option is : (B)
384.91 K

Topic: Chemistry, Thermal Properties of Matter, NEET
Cervical vertebrae are located in

Options:
A Thoracic region
B Abdominal region
C Neck region
D Lumbar region

The correct answer is:
Neck region

Solution:
Cervical vertebrae are located in neck region.

In vertebrates, cervical vertebrae (singular: vertebra) are the vertebrae of the neck, immediately below the skull. Thoracic vertebrae in all mammalian species are those vertebrae that also carry a pair of ribs, and lie caudal to the cervical vertebrae.

Topic: Biology, Locomotion and Movement, NEET
Cetyl tri methyl ammonium chloride is which type of detergent?

Options:
A Anionc
B Cationic
C Non - ionic
D Biosoft

The correct answer is:
Cationic

Solution:
Distearyl dimethylammonium chloride and cetyl trimethyl ammonium chloride are typical cationic surfactants used in many of today's hair - conditioning products.

Topic: Chemistry, Surface Chemistry, NEET
Cetyl trimethyl ammonium bromide is a popular

Options:
A Cationic detergent
B Anionic detergent
C Non-ionic detergent
D Antioxidant

The correct answer is:
Cationic detergent

Solution:
Cetyltrimethyl ammonium bromide is a popular Cationic detergent with Molecular Formula C19H42BrN

Topic: Chemistry, Chemistry in Everyday Life, NEET
CH2=CH-CH3âCl2,500Â°CA. The product A is

Options:
A
B
C
D

The correct answer is:

Solution:
It is free radical substitution at allylic position.

Topic: Chemistry, Hydrocarbons, NEET
(CH3)3CMgCl on reaction with D2O produces –

Options:
A (CH3)3CD
B (CH3)3OD
C (CD3)3CD
D

(CD3)3OD

The correct answer is:
(CH3)3CD

Solution:
The reaction is as follow
D 2 O has D + it with react with alkyl part (-ve) of grignard reagent.

Topic: Chemistry, Hydrocarbons, NEET
CH 3 Br → KCN A → LiAlH 4 4 H CH 3 CH 2 NH 2

IUPAC name of A is

Options:
A Methyl cyanide
B Methyl isonitrile
C Acetonitrile
D Ethane nitrile

The correct answer is:
Ethane nitrile

Solution:
CH 3 Br → KCN CH 3 CN Acetonitrile → LiAlH 4 4 H CH 3 CH 2 NH 2 Ethylamine
IUPAC name of acetonitrile is Ethanenitrile.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
CH 3 − C || O −OH → NH 3 A → Al 2 O 3 B → H 3 O + D , D is

Options:
A CH3NH2
B CH3COOH
C CH3CH2COOH
D CH3CH2NH2

The correct answer is:
CH3COOH

Solution:
Here the reaction is as follows
CH3-C||O-OH→NH3CH3COONH4(A)→Al2O3CH3CONH2→H3O+CH3COOH

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
CH 3 CH 2 CH 2 OH → conc. H 2 SO 4 X → Cl 2 , hν Y , X and Y are

Options:
A X=CH3CH2CH3,Y=CH3CH2CH2Cl
B X=CH3CH=CH2,Y=CH2ClCH=CH2
C X=CH2=CH2,Y=CH3CH2Cl
D X=CH3CH2CH3,Y=CH3CH=CH2

The correct answer is:
X=CH3CH=CH2,Y=CH2ClCH=CH2

Solution:
CH 3 CH 2 CH 2 OH → conc. H 2 SO 4 CH 3 CH= CH 2 X → Cl 2 ,hv Cl− CH 2 −CH= CH 2 Y

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
CH3CH2CH=CH2→H2O,H2O2,OH-B2H6Z

What is Z?

Options:
A CH3CH2CH2CH2OH
B
C CH3CH2CH2CHO
D CH3CH2CH2CH3

The correct answer is:
CH3CH2CH2CH2OH

Solution:

Topic: Chemistry, Alcohols Phenols and Ethers, NEET, NEET 2020 (Phase 2)
CH 3 CH 2 COOH â¶ red P Cl 2 Î â¶ alc.KOH Î
What is B ?

Options:
A CH3CH2COCl
B CH3CH2CHO
C ClCH2CH2COOH
D CH2=CHCOOH

The correct answer is:
CH2=CHCOOH

Solution:
1st step is Hell-Volhard Zelinsky reaction, halogenation of carboxylic acid at Î±â - C
CH 3 CH 2 COOH â red P - HCl Cl 2 CH 3 CHClCOOH â - HCl alc. KOH CH2=CHCOOHAcrylic acid

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
CH 3 CH 2 COOH → Red P/HI   → alc. KOH Product⋅Product is

Options:
A CH2=CHCOOH
B CH3CH2OH
C CH3CH2CN
D CH2CHClCOOH

The correct answer is:
CH2=CHCOOH

Solution:
It is HVZ reaction, i.e. alpha halogenation of carboxylic acid followed by dehydrohalogenation.

Topic: Chemistry, Carboxylic Acid Derivatives, NEET