datavorous/entrance-exam-dataset huggingface dataset:
In the human genome project, the method that is involved in identifying all the genes that are expressed as RNA is referred to as

Options:
A sequence annotation.
B expressed sequence tags.
C bioinformatics.
D DNA fingerprinting.

The correct answer is:
expressed sequence tags.

Solution:
Methodologies involved in the human genome project involved two major approaches. One approach focused on identifying all the genes that are expressed as RNA refers to expressed sequence tags (ESTs).

Topic: Biology, Molecular Basis of Inheritance, NEET
In the hydrated salt CuSO4·5H2O, what does the "5H2O" represent?

Options:
A The number of copper ions
B The number of sulfate ions
C The number of water molecules associated with the salt
D The molecular formula of the salt

The correct answer is:
The number of water molecules associated with the salt

Solution:
In the formula CuSO4·5H2O, "5H2O" represents the number of water molecules associated with the salt CuSO4.

Topic: Chemistry, Hydrogen, NEET
In the hydrocarbon
The state of hybridisation of carbons 1,3 and 5 are in the following sequence

Options:
A $s p^2, s p, s p^3$
B $s p, s p^3, s p^2$
C $s p, s p^2, s p^3$
D $s p^3, s p^2, s p$

The correct answer is:
$s p, s p^3, s p^2$

Solution:
Hence, the state of hybridisation of carbons 1,3 and 5 are $s p, s p^3$ and $s p^2$ respectively.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET, NEET 2008 (Screening)
In the Hydrogen atom spectrum, frequency 2.7Ã1015 Hz of EM wave is emitted when transmission takes place from 2 to 1. If it moves from 3 to 1, the frequency emitted will be

Options:
A 3.2×1015 Hz
B 32×1015 Hz
C 1.6×1015 Hz
D 16×1015 Hz

The correct answer is:
3.2×1015 Hz

Solution:
The frequency v of the emitted electromagnetic radiation, when a hydrogen atom de - excites from the level n2 to n1 is
υ=RCZ21n12-1n22
When the transition takes place from n2=2 to n1=1
then
2.7×1015=RCZ2112-122.....(i)
When the transition takes place from n2=3 to n1=1
then let the frequency be υ.
∴υ=RCZ2 112-132.....(i)
From equation (i) and (ii), we get
υ=32×2.7×101527=3.2×1015 Hz

Topic: Physics, Atomic Physics, NEET
In the hydrogen atom, the electron is moving around the nucleus with velocity 2.18 Ã 106 m s-1 in an orbit of radius 0.528 Aâ. The acceleration of the electron is

Options:
A 9 Ã1018 m s-2
B 9 Ã 1022 m s-2
C 9 Ã 10-22 m s-2
D 9 Ã 1012 m s-2

The correct answer is:
9 Ã 1022 m s-2

Solution:
Given, v=2.18 Ã106 m s-1, r=0.528 Ã 10-10 m
Acceleration of electron moving round the nucleus
a = 2.18 Ã10620.528 Ã10-10â 9 Ã1022 m s-2

Topic: Physics, Atomic Physics, NEET
In the hydrogenation of propyne (C3H4), how many moles of hydrogen (H2) are added to form propane (C3H8)?

Options:
A 1 mole
B 2 moles
C 3 moles
D 4 moles

The correct answer is:
2 moles

Solution:
In the hydrogenation of propyne (C3H4) to form propane (C3H8), 2 moles of hydrogen (H2) are added to the molecule.

Topic: Chemistry, Hydrocarbons, NEET
In the hydrolysis of ethyl acetate, what is the relationship between the order of the reaction and the concentrations of both ethyl acetate and water?

Options:
A Both concentrations affect the reaction order.
B Only the concentration of ethyl acetate affects the reaction order.
C Only the concentration of water affects the reaction order.
D Neither concentration affects the reaction order.

The correct answer is:
Only the concentration of ethyl acetate affects the reaction order.

Solution:
In the hydrolysis of ethyl acetate, the rate of reaction is affected by the concentration of ethyl acetate only, making it a second-order reaction.

Topic: Chemistry, Chemical Kinetics, NEET
In the hydrolysis of sugar, what provides H+ ions for catalysis?

Options:
A Nitric oxide
B Dioxygen
C Sulphuric acid
D Oxygen

The correct answer is:
Sulphuric acid

Solution:
The paragraph states that the hydrolysis of sugar is catalyzed by H+ ions furnished by sulfuric acid.

Topic: Chemistry, Surface Chemistry, NEET
In the hypogynous flower the gynoecium occupies the highest position while the other parts are situated below it. The ovary in such a flower is said to be ___.

Options:
A Collateral
B Inferior
C Middle
D Superior

The correct answer is:
Superior

Solution:
In the hypogynous flower the gynoecium occupies the highest position while the other parts are situated below it. The ovary in such a flower is said to be Superior.

Topic: Biology, Morphology of Flowering Plants, NEET
In the hypothesis given by Peter Mitchell, where will we observe the accumulation of hydrogen ions (protons) in the cell?

Options:
A Mitochondrial matrix
B Lumen of thylakoids
C Stroma
D On the thylakoid membrane

The correct answer is:
Lumen of thylakoids

Solution:
According to the chemiosmotic hypothesis, the splitting of water occurs in the lumen of the thylakoid, hence leading to the accumulation of H+ ions in the lumen itself. This creates the proton gradient across the membrane leading to the ATPase pump activity.

Topic: Biology, Photosynthesis in Higher Plants, NEET
In the industrial preparation of dihydrogen from methane, which gas serves as a reactant?

Options:
A Methane
B Carbon monoxide
C Dihydrogen
D Carbon dioxide

The correct answer is:
Methane

Solution:
Methane serves as a reactant in the industrial preparation of dihydrogen from methane.

Topic: Chemistry, Hydrocarbons, NEET
In the industrial preparation of dihydrogen gas from methane, what is the role of the nickel catalyst in the reaction?

Options:
A It acts as a reactant.
B It speeds up the reaction without being consumed.
C It produces carbon monoxide.
D It produces methane gas.

The correct answer is:
It speeds up the reaction without being consumed.

Solution:
The nickel catalyst in this reaction serves as a promoter to facilitate the reaction without being consumed itself.

Topic: Chemistry, Hydrocarbons, NEET
In the initiation step of halogenation, which bond is easiest to break?

Options:
A Cl–Cl bond
B C–C bond
C C–H bond
D C–Cl bond

The correct answer is:
Cl–Cl bond

Solution:
In the initiation step, the Cl–Cl bond is the easiest to break because it is weaker compared to the C–C and C–H bonds.

Topic: Chemistry, Hydrocarbons, NEET
In the internal ear, the 'Organ of Corti' which bears hair cells is located in

Options:
A sacculus
B scala media
C scala tympani
D scala vestibule

The correct answer is:
scala media

Solution:
The 'Organ of Corti', which bears hair cells is located in the scala media. It is situated on the basilar membrane. These hair cells act as auditory receptors. They are in close contact with the afferent nerve fibres.

Topic: Biology, Neural Control and Coordination, NEET
In the ionization of hydrochloric acid in water, what is HCl(aq) acting as?

Options:
A A proton acceptor
B A strong base
C An acid
D A neutral molecule

The correct answer is:
An acid

Solution:
In the ionization of hydrochloric acid in water, HCl(aq) acts as an acid by donating a proton.

Topic: Chemistry, Ionic Equilibrium, NEET
In the isolation of metals, calcination process usually results in:

Options:
A Metal oxide
B Metal carbonate
C Metal sulphide
D Metal hydroxide

The correct answer is:
Metal oxide

Solution:
Calcination is used for decomposition of metal carbonates
MCO3 ââMO+CO2â

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
In the IVF technique, which of the following is transferred into the fallopian tube?

Options:
A Zygote
B Embryo upto 8 blastomere stage
C Embryo in 32 cell stage
D Either A or B

The correct answer is:
Either A or B

Solution:
In vitro fertilization is the fertilization outside the body in similar conditions as that in the body is the method which sperm from the male and ovum from the female are collected and are induced to form zygote or in early embryo with up to 8 blastomeres could then be transferred into a fallopian tube.

Topic: Biology, Reproductive Health, NEET
In the Kjedahl's method for estimation of nitrogen present in soil sample, ammonia evolved from 0.75g of sample neutralized 10ml of 1M H2SO4 The percentage of nitrogen in the soil is:

Options:
A 37.83
B 45.32
C 35.33
D 45.33

The correct answer is:
37.83

Solution:
moles of 1M H2SO4=10 m mol
moles of NH3 consumed = 20 m mol
Weight of N=14×201000g=0.280 g
% N=0.2800.75×100=37.33%

Topic: Chemistry, General Organic Chemistry, NEET, NEET 2014
In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralized 10 mL of 1M H2SO4. The percentage of nitrogen in the soil is

Options:
A 37.33
B 43.33
C 45.33
D 35.33

The correct answer is:
37.33

Solution:
∵M×V(ml)=m mol
10 m mol H2SO4=20 m mol of NH3
[H2SO4+2NH3→(NH4)2SO4]
1 mol NH3 contains 14 g nitrogen
20×10-3 mol NH3 contains 14×20×10-3 nitrogen
0.75 g of sample contains
% Nitrogen =14×20×10-30.75×100=37.33%

Topic: Chemistry, General Organic Chemistry, NEET
In the Kolbe's electrolytic method, what type of carboxylic acid salts are used for the reaction?

Options:
A Calcium salts
B Sodium or potassium salts
C Ammonium salts
D Magnesium salts

The correct answer is:
Sodium or potassium salts

Solution:
The Kolbe's electrolytic method utilizes the sodium or potassium salts of carboxylic acids for the reaction.

Topic: Chemistry, Hydrocarbons, NEET
In the laboratory, which method can be used to prepare Carbon Monoxide (CO)?

Options:
A Direct Combustion of Fossil Fuels
B Steam Reforming of Natural Gas
C Reaction of Carbon with Oxygen
D Reaction of Carbonates with Acid

The correct answer is:
Reaction of Carbon with Oxygen

Solution:
Correct Option is : (C)
Reaction of Carbon with Oxygen

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
In the lac operon, the structural genes are switched off when:

Options:
A Repressor binds to operator
B Repressor binds to promoter
C Repressor binds to regulator
D Repressor binds to allolactose

The correct answer is:
Repressor binds to operator

Solution:
A short sequence of DNA where the repressor binds preventing RNA polymerase from attaching to the promoter this is called on/off switch of transcription.

Topic: Biology, Molecular Basis of Inheritance, NEET
In the lactose operon of Escherichia coli, what is the function of promoter

Options:
A Binding of Gyrase enzyme
B Binding of RNA polymerase
C Codes for RNA polymerase
D Processing of messenger RNA

The correct answer is:
Binding of RNA polymerase

Solution:
Promoter gene (p) is the actual site of start of transcription and it is the site where RNA polymerase binds to the DNA prior to beginning of transcription.

Topic: Biology, Molecular Basis of Inheritance, NEET
In the larynx, which of the following is a thin elastic cartilaginous flap?

Options:
A Thyroid
B Soundbox
C Glottis
D Epiglottis

The correct answer is:
Epiglottis

Solution:
Larynx: The pharynx opens into the trachea through the larynx. The larynx is a cartilaginous box which is responsible for sound production; hence, it is also known as a soundbox.
Epiglottis: It is a thin elastic cartilaginous flap that prevents the entry of food into the larynx during swallowing.

Topic: Biology, Breathing and Exchange of Gases, NEET
In the lead chamber process, what is the catalyst for the oxidation of sulfur dioxide?

Options:
A Oxygen
B Sulphur trioxide
C Nitric oxide
D Dioxygen

The correct answer is:
Nitric oxide

Solution:
The paragraph provides an example of homogeneous catalysis in the lead chamber process, where nitric oxide is the catalyst for the oxidation of sulfur dioxide.

Topic: Chemistry, Surface Chemistry, NEET
In ____ the leaf base expands into a sheath covering the stem partially or wholly.

Options:
A monocots
B dicots
C China rose
D leguminous plants

The correct answer is:
monocots

Solution:
Leaf base is the lowest part of the leaf found near the petiole. It has uses in classification and identification of the plant as it greatly varies from plant to plant. In many plants, like monocotyledons, it gets modified by expanding itself into a sheath which partially or wholly covers the stem. This covering is found to be at some distance above the node and is usually found in plants like Zea mays, sugarcane, wheat etc. When the leaf base is swollen in some leguminous plants it is known as the pulvinus.

Topic: Biology, Morphology of Flowering Plants, NEET
In _________ the leaflets are attached at a common point i.e. at the tip of petiole.

Options:
A Silk Cotton
B Neem.
C Calotropis
D Guava

The correct answer is:
Silk Cotton

Solution:
Types of leaves - These may be of 2 types :
A. Simple leaf: If the lamina is intact or if incised, the incisions should not reach the midrib. Example - Neem, Peepal.
B. Compound leaf: If the incisions reach the midrib and dividing the lamina into a number of leaflets. It may be:
(i) Pinnately compound leaf: Leaflets are arranged on a common axis - rachis. Example: Clematis.
(ii) Palmately compound leaf: Leaflets are attached to a common point i.e. tip of petiole.
Example: Silk cotton.

Topic: Biology, Morphology of Flowering Plants, NEET
In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of

Options:
A bundle sheath
B phloem
C epidermis
D mesophyll.

The correct answer is:
mesophyll.

Solution:
In C4 plants initial fixation of carbondioxide occurs in mesophyll cell, initial CO2 acceptor is 3C PEP and the first stable compound is 4C Malic acid.

Topic: Biology, Photosynthesis in Higher Plants, NEET
In the leaves of $\mathrm{C}_4$ plants, malic acid formation during $\mathrm{CO}_2$ fixation occurs in the cells of:

Options:
A bundle sheath
B phloem
C epidermis
D mesophyll.

The correct answer is:
mesophyll.

Solution:
$\mathrm{C}_4$ plants have Kranz anatomy consisting of mesophyll and bundle sheath cells. In mesophyll cells, PEP functions as $\mathrm{CO}_2$ acceptor and forms oxalic acid. Later, oxalic acid is reduced to malic acid. Finally, malic acid is transferred to bundle sheath cells.

Topic: Biology, Photosynthesis in Higher Plants, NEET, NEET 2007
In the Lewis description of a covalent bond, what does the Bond Order represent?

Options:
A The number of electrons in the bond
B The strength of the bond
C The number of bonds between two atoms in a molecule
D The distance between two atoms in a molecule

The correct answer is:
The number of bonds between two atoms in a molecule

Solution:
In the Lewis description of a covalent bond, the Bond Order is given by the number of bonds between the two atoms in a molecule.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
In the Lewis dot structures, which atom typically occupies the central position in the molecule/ion?

Options:
A The most electronegative atom
B The least electronegative atom
C The smallest atom
D The largest atom

The correct answer is:
The least electronegative atom

Solution:
In general, the least electronegative atom occupies the central position in the molecule/ion.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
In the limbic system, we will find -

(i) Hippocampus

(ii) Pons

(iii) Amygdala

(iv) Cerebellum

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

The correct answer is:
(i), (iii)

Solution:
The limbic system found within the brain is generally associated with emotion, learning, memory and motivation. It generally said to be the brain of brain. The parts involved in the structure are amygdala and the hippocampus found in the anterior and medial section of temporal lobe.

Topic: Biology, Neural Control and Coordination, NEET
In the L.S. of an embryo of grass, the labels A and B are:

Options:
A A-Shoot apex, B-Radicle
B A-Root cap, B-Radicle
C A-Shoot apex, B-Epiblast
D None of these

The correct answer is:
A-Shoot apex, B-Radicle

Solution:
The embryo develops at the micropylar end of the embryo sac where the zygote is situated.
In the given diagram, the labels A and B are:
A-Shoot apex,
B-Radicle

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
In the Lucas test, what is the result when a tertiary alcohol reacts with Lucas reagent?

Options:
A Immediate turbidity
B Turbidity after heating
C No turbidity at any temperature
D Formation of a ketone

The correct answer is:
Immediate turbidity

Solution:
Tertiary alcohols produce immediate turbidity when they react with Lucas reagent.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
In the majority of monocots, the first stable product of photosynthesis during the dark reaction is

Options:
A Malic acid
B Oxaloacetic acid
C 3-phosphoglyceric acid
D Phosphoglyceraldehyde

The correct answer is:
Oxaloacetic acid

Solution:
3-phosphoglyceric acid is the first product formed in the C3 cycle. It is then converted to glyceraldehyde3-phosphate. Oxaloacetic acid, 4 carbon compounds is the first product formed in the C4 cycle. It is then converted to malic acid.

Topic: Biology, Photosynthesis in Higher Plants, NEET
In the majority of the angiosperms, pollens are discharged at:

Options:
A 2-celled stage
B 3-celled stage
C 7-celled stage
D 8-celled stage

The correct answer is:
2-celled stage

Solution:
Microsporogenesis is the process of the male gamete development in Angiosperms from the microspore mother cell. A tetrad is formed by a meiotic divisional process that leads to the formation of the pollen grain.
The pollen grain is a two-layered structure having outer exine and inner intine. When the pollen grain matures, it contains two cells - vegetative cells and a generative cell. The generative cell further divides and forms the two male gametes which will participate in the double fertilization process. In nearly 60% of the angiosperms, pollen is released in the two-celled stage and the rest, it is released in the three-cell stage.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
In the majority of the flowering plants, female gametophytes having eight nuclei is

Options:
A tetrasporic.
B monosporic.
C bisporic.
D trisporic.

The correct answer is:
monosporic.

Solution:
Female gametophyte: In a majority of flowering plants, one of the megaspores is functional while the other three degenerate. Only the functional megaspore develops into the female gametophyte (embryo sac). This method of embryo sac formation from a single megaspore is termed monosporic development.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
In the male reproductive system of cockroaches, which of the following structures represents the external genitalia?

Options:
A Gonopore
B Vas deferens
C Phallomere
D Ejaculatory duct

The correct answer is:
Phallomere

Solution:
The external genitalia are represented by male gonapophysis or phallomere (chitinous asymmetrical structures, surrounding the male gonopore).

Topic: Biology, Structural Organisation in Animals, NEET
In the mammalian eye, the 'fovea' is the the center of the visual field, where:

Options:
A The optic nerve leaves the eye
B Only rods are present
C More rods than cones are found
D High density of cones occur, but has no rods

The correct answer is:
High density of cones occur, but has no rods

Solution:
Area centralis of the retina: A little part of the retina that lies upon the optical axis is called area centralis. Here, the retina is very thin and contains only cone cells. This part is called a yellow spot or macula lutea. In man, this area has a small shallow depression called fovea centralis. The latter is the most sensitive part of an eye, i.e. the area of most acute vision. It is also claimed that the cone cells in fovea centralis are placed somewhat obliquely. So that these can form magnified images of the object.

Topic: Biology, Neural Control and Coordination, NEET, NEET 2015 (Phase 2)
In the manufacture of bulk organic chemicals, particularly methanol, what type of catalyst is used in the reaction of carbon monoxide (CO) with dihydrogen (H2)?

Options:
A Platinum catalyst
B Cobalt catalyst
C Palladium catalyst
D Iron catalyst

The correct answer is:
Cobalt catalyst

Solution:
Cobalt catalyst is used in the reaction of carbon monoxide (CO) with dihydrogen (H2) to manufacture bulk organic chemicals, particularly methanol.

Topic: Chemistry, Hydrogen, NEET
In the manufacturing of vanaspati fat, dihydrogen is used to hydrogenate which type of vegetable oils?

Options:
A Monounsaturated vegetable oils
B Polyunsaturated vegetable oils
C Saturated vegetable oils
D Hydrogenated vegetable oils

The correct answer is:
Polyunsaturated vegetable oils

Solution:
Dihydrogen is used in the manufacture of vanaspati fat by hydrogenating polyunsaturated vegetable oils like soybean and cottonseed oils.

Topic: Chemistry, Hydrogen, NEET
In the mass percentage formula, what does the "Total mass of the solution" refer to?

Options:
A The mass of the solute
B The mass of the solvent
C The combined mass of all components in the solution
D The volume of the solution

The correct answer is:
The combined mass of all components in the solution

Solution:
The "Total mass of the solution" includes the mass of both the solute and the solvent, as well as any other components.

Topic: Chemistry, Solutions, NEET
In the mechanism for the reaction of HBr with t-butyl alcohol, pick out the correct statement.

Options:
A Formation of protonated alcohol in a slow step
B Formation of (CH3)3C+ is a slow step
C Formation of (CH3)3CBr from (CH3)3C+ is a slow step
D Formation of (CH3)3C+ is a fast step

The correct answer is:
Formation of (CH3)3C+ is a slow step

Solution:
The mechanism of this reaction is as follows
(CH 3 ) 3 COH + HBr⇌ (CH 3 ) 3 C O + H 2  +  Br − (fast)
Hence, formation on carbocation (CH3)3C+ is slow step (R.D.S.).

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
In the mechanism of acid-catalysed hydration, what is formed when protonation of alkene occurs?

Options:
A Alcohol
B Water
C Carbocation
D Alkene

The correct answer is:
Carbocation

Solution:
This step of the mechanism involves the formation of a carbocation.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
In the mechanism of action of a protein hormone, one of the second messengers is

Options:
A Cyclic AMP
B Insulin
C T3
D Gastrin

The correct answer is:
Cyclic AMP

Solution:
Option (a) is the answer.

Topic: Biology, Chemical Coordination and Integration, NEET
In the mechanism of alcohol dehydration, what is released in the last step by elimination of a proton?

Options:
A Protonated alcohol
B Water
C Carbocation
D Alkene

The correct answer is:
Alkene

Solution:
In the last step of the mechanism, alkene is formed, and the acid used in the first step is released.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
In the meiosis type of cell division, the centromere divides during which stage?

Options:
A Never divides
B Anaphase-I
C Interkinesis
D Anaphase-II

The correct answer is:
Anaphase-II

Solution:
Anaphase II is the stage when sister chromatids of every chromosome separate and begin to move towards the opposite ends of the cell. Splitting of centromere occurs in this stage. The separation and the movement are due to the shortening of the kinetochore microtubules. Anaphase II precedes telophase II.

Topic: Biology, Cell Cycle and Cell Division, NEET
In the metallurgy of copper, metallic copper is finally formed in the furnace by the reactions

Options:
A CuS+O2→Cu+SO2
B Cu2S+O2→2Cu+SO2
C 2Cu2S+3O2→2Cu2O+2SO2
Cu2S+2Cu2O→6Cu+SO2
D 2CuS+3O2→2CuO+2SO2
2CuO+CuS→3Cu+SO2

The correct answer is:
2Cu2S+3O2→2Cu2O+2SO2
Cu2S+2Cu2O→6Cu+SO2

Solution:
Self reduction
2Cu2S+3O2→2Cu2O+2SO2
Cu2S+2Cu2O→6Cu+SO2

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
In the middle of the depletion layer of a reverse- biased p-n junction, the

Options:
A electric field is zero
B potential is maximum
C electric field is maximum
D potential is zero

The correct answer is:
electric field is zero

Solution:
Electric field is zero in the middle of the depletion layer of a reverse baised p-n junction

Topic: Physics, Semiconductors, NEET
In the molecule CH4, which bond has a bond dissociation enthalpy?

Options:
A C-C bond
B C-H bond
C H-H bond
D C-O bond

The correct answer is:
C-H bond

Solution:
In the molecule CH4 (methane), the bond dissociation enthalpy refers to the energy required to break the C-H bonds.

Topic: Chemistry, Thermodynamics (C), NEET