datavorous/entrance-exam-dataset huggingface dataset:
Which of the following is true regarding the Wurtz reaction?

Options:
A It is an oxidation reaction.
B It can be used to prepare aldehydes.
C It is not suitable for synthesizing higher alkanes.
D It is a coupling reaction for alkyl groups.

The correct answer is:
It is a coupling reaction for alkyl groups.

Solution:
The Wurtz reaction is a coupling reaction that allows two alkyl groups to combine to form a higher alkane. It is not an oxidation reaction and is not used for aldehyde synthesis.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following is true with respect to AUG?

Options:
A It codes for methionine only
B It is an initiation codon
C It codes for methionine in both prokaryotes and eukaryotes
D All of the above

The correct answer is:
All of the above

Solution:
AUG has dual functions. It codes for Methionine (met), and it also act as initiator codon.

Topic: Biology, Molecular Basis of Inheritance, NEET
Which of the following is unique to mitosis and not a part of meiosis?

Options:
A Homologous chromosomes behave independently
B Chromatids are separated during anaphase
C Homologous chromosomes pair and form bivalents
D Homologous chromosomes crossover.

The correct answer is:
Chromatids are separated during anaphase

Solution:
Mitosis is equational division in which two chromatids of a chromosome separates during anaphase. Chromosomes align at the equator during metaphase and 2 spindle fibre attaches to each chromosome. During anaphase, the kinetochore are pulled apart and centromere splits and chromatids are separated.

Topic: Biology, Cell Cycle and Cell Division, NEET
Which of the following is unstable at cooking temperature?

Options:
A Aspartame
B Saccharin
C Sucralose
D Alitame

The correct answer is:
Aspartame

Solution:
Correct Option is : 1
Aspartame

Topic: Chemistry, Chemistry in Everyday Life, NEET
Which of the following is used as a substrate for the production of CH3CH2OH?

Options:
A Maize
B Malted cereals
C Lactose
D None of the above

The correct answer is:
Malted cereals

Solution:
Microbes especially yeasts are used for the production of beverages like wine, beer, whisky, brandy or rum. For this purpose the yeast Saccharomyces cerevisiae commonly called brewerâs yeast is used for fermenting malted cereals and fruit juices, to produce ethanol.

Topic: Biology, Microbes in Human Welfare, NEET
Which of the following is used as an atmospheric pollution indicator?

Options:
A Lepidoptera
B Lichens
C Lycopersicon
D Lycopodium

The correct answer is:
Lichens

Solution:
Lichens cannot survive in polluted air.

Topic: Biology, Evolution, NEET
Which of the following is used as an emergency contraceptive?

Options:
A Administration of progestogens
B Administration of progestogens-estrogen combinations
C IUDs
D All of the above

The correct answer is:
All of the above

Solution:
Contraception is avoidance of pregnancy. These include Natural Methods, Barrier methods, Intrauterine devices, Chemical methods, Surgical methods, Oral pills and Implants. If any couple had unprotected sex or if there was any sexual assault or barrier methods failed to work there are certain emergency contraceptive methods too that can avoid unwanted pregnancy. These can be done by using pills and these are known as morning-after pills. These are progesterone or progesterone-estrogen combination pills. Apart from pills there is one more method that is insertion of IUD's but this should be done within 72 hrs of unprotected sex.

Topic: Biology, Reproductive Health, NEET
Which of the following is used by diabetic persons and people who need to control their intake of calories?

Options:
A Aspartame
B Saccharin
C Sucralose
D Alitame

The correct answer is:
Alitame

Solution:
Correct Option is : 4
Alitame

Topic: Chemistry, Chemistry in Everyday Life, NEET
Which of the following is used for bolting in beet?

Options:
A Kinetin
B Xylene
C Ethylene
D Gibberellin

The correct answer is:
Gibberellin

Solution:
Gibberellins are PGR which are acidic in nature and have been reported from widely different organisms such as fungi and higher plants. They are denoted as GA1, GA2, GA3 and so on. They produce a wide range of physiological responses in plants. Their ability to cause an increase in the length of the axis is used to increase the length of grapes stalks. Gibberellins, cause fruits like apple to elongate and improve its shape. They also delay senescence. Gibberellins also promote bolting (internode elongation just prior to flowering) in beet, cabbages and many plants with rosette habit.

Topic: Biology, Plant - Growth and Development, NEET
Which of the following is used for manufacture of paints?

Options:
A PVC
B Polystyrene
C Urea-formaldehyde resin
D Glyptal

The correct answer is:
Glyptal

Solution:
Correct Option is : 4
Glyptal

Topic: Chemistry, Polymers, NEET
Which of the following is used for manufacture of unbreakable cups and laminated sheets?

Options:
A Urea-formaldehyde resin
B Bakelite
C Polythene
D polystyrene

The correct answer is:
Urea-formaldehyde resin

Solution:
Correct Option is : 1
Urea-formaldehyde resin

Topic: Chemistry, Polymers, NEET
Which of the following is used for the conversion of 2-hexyne into trans-2-hexene?

Options:
A H2,PtO2
B Li-NH3/C2H5OH
C NaBH4
D H2/Pd/BaSO4

The correct answer is:
Li-NH3/C2H5OH

Solution:
Reduction of 2-hexyne with Li-NH3/C2H5OH gives trans-2-hexene.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following is used in DNA fingerprinting?

Options:
A Plasmid
B Vector
C Probe
D Clone

The correct answer is:
Probe

Solution:
DNA fingerprinting uses single-stranded radioactive probes that are washed over the nylon surface to allow their joining to any DNA fragments of the same composition thereby matching different DNA samples. Double-stranded probes would not hybridize with DNA fragments present on the nylon membrane.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following is used to deliver, a desirable gene into an animal cell?

Options:
A Disarmed retrovirus
B Disarmed Agrobacterium
C Disarmed E.coli
D Both (A) and (C)

The correct answer is:
Disarmed retrovirus

Solution:
Retroviruses in animals have the ability to transform normal cells into cancerous cells. Retroviruses have been disarmed and are used to deliver desirable genes into animal cells. So, once a gene or a DNA fragment has been ligated into a suitable vector it is transferred into a bacterial, plant or animal host (where it multiplies).

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following is wrong statement?

Options:
A Ozone is violet-black in solid state
B Ozone is diamagnetic gas
C ONCl and ONO- are isoelectronic
D O3 molecule is bent

The correct answer is:
ONCl and ONO- are isoelectronic

Solution:
Ozone in solid state is violet-black solid.
All paired electrons, so it is diamagnetic as per Lewis structure.
ONCl – no. of electrons = 32
ONO– – no. of electrons = 24
They are not isoelectronic.
O3 has bent structure with Bond angle 116.8o .

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is wrongly matched in the given table?

Options:
A

Microbe	Product	Application

Trichoderma polysporum	Cyclosporin A	Immunosuppressive drug

B

Microbe	Product	Application

Monascus purpureus	Statins	Lowering of blood cholesterol

C

Microbe	Product	Application

Streptococcus	Streptokinase	Removal of clot from blood vessel

D

Microbe	Product	Application

Clostridium butylicum	Lipase	Removal of oil stains

The correct answer is:

Microbe	Product	Application

Clostridium butylicum	Lipase	Removal of oil stains

Solution:
Clostridium butylicum is used for the production of butyric acid that is used to make rancid butter.

Lipases: These are used in detergent formulations and are helpful in removing oily stains from laundry. Lipases are obtained from Candida lipolytica and Geotrichum candidum.

Topic: Biology, Microbes in Human Welfare, NEET, NEET 2016 (Phase 1)
Which of the following is Zwitter ion?

Options:
A
B
C
D

The correct answer is:

Solution:
Here
is Zwitter ion as it has both acidic and basic entities.

Topic: Chemistry, Biomolecules, NEET
Which of the following is/are an example/s of direct gene transfer?

Options:
A Microinjection
B Electroporation
C Particle gun
D All of these

The correct answer is:
All of these

Solution:
Direct gene transfer is a method using which an alien DNA can directly be introduced into the host cells. Using micro-injection, recombinant DNA is directly introduced into nucleus of a plant cells. Particle guns, also known as gene guns or biolistics, bombard the plant cells with high velocity micro particles of gold or tungsten, coated with DNA. Electroporation can also be used for direct gene transfer.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following is/are called morning-after pills?

Options:
A i-pill
B unwanted 72
C Pill-72
D All of these

The correct answer is:
All of these

Solution:
Morning after pills contain the compound levonorgestrel which is combined with estrogen. These pills on consumption delay the ovulation or egg release. It must be consumed within 72 hours after sexual intercourse. This pill will not have any effect if there is implantation.
It is sold in various brand name like - iPill, unwanted72, pill72 or Plan B.
These are sold by pharmacies without any prescription.

Topic: Biology, Reproductive Health, NEET
Which of the following is/are cause(s) of biodiversity losses?

Options:
A Over-exploitation only
B Habitat loss and fragmentation only
C Over-exploitation, habitat loss and fragmentation
D Climate change only

The correct answer is:
Over-exploitation, habitat loss and fragmentation

Solution:
There are four major causes of biodiversity loss
1. Habitat loss and fragmentation
2. Over-exploitation
3. Co-extinction
4. Alien species invasions

Topic: Biology, Biodiversity and its Conservation, NEET, NEET 2023 (Manipur)
Which of the following is/are considered as limitations of the ecological pyramids?

Options:
A It does not take into account the same species belonging to two or more trophic levels
B It assumes a simple food chain.
C Saprophytes are not given any place in ecological pyramids despite playing an important role in the ecosystem.
D All of the above

The correct answer is:
All of the above

Solution:
There are certain limitations of ecological pyramids such as it does not take into account the same species belonging to two or more trophic levels. It assumes a simple food chain, something that almost never exists in nature; it does not accommodate a food web. Moreover, saprophytes are not given any place in ecological pyramids even though they play a vital role in the ecosystem.

Topic: Biology, Ecosystem, NEET
Which of the following is/are invasive alien species in the Indian context?

Options:
A Lantana
B Parthenium
C Eichhornia
D All of these

The correct answer is:
All of these

Solution:
Whenever alien species are introduced unintentionally or deliberately, some of them turn invasive and cause the decline or extinction of indigenous species. In India, the environmental damage is caused by invasive weed species like carrot grass (Parthenium), Lantana and water hyacinth (Eichhornia) and threat is posed to our native species

Topic: Biology, Biodiversity and its Conservation, NEET
Which of the following is/are pre-requisite(s) for imbibition?

(a) Presence of mucilage in the adsorbent.
(b) The affinity between the adsorbent and the liquid.
(c) Water potential gradient between the adsorbent and the liquid.
(d) Presence of cuticle on the surface of the adsorbent.

Choose the correct option from the following.

Options:
A (b) and (c)
B Only (b)
C (a), (b) and (c)
D (a) and (d)

The correct answer is:
(b) and (c)

Solution:
Absorption of fluid by a colloid or porous solid that often results in swelling is known as imbibitions. Two conditions are prerequisites for imbibition, i.e.,
a) a water potential gradient must exist between the surface of the absorbent and the liquid imbibed, and
b) an affinity must exist between the component of the absorbent and the imbibed substance.

Topic: Biology, Transport in Plants, NEET
Which of the following is/are present in female cockroach?
A. Collateral gland
B. Mushroom gland
C. Spermatheca
D. Anal style
E. Phallic gland
Choose the most appropriate answer from the options given below:

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

The correct answer is:
A and C only

Solution:
The correct answer is option (4) as
A. Collateral gland Present in female cockroaches
It is a pair of gland that secrete the hard egg case or ootheca
B. Mushroom gland Absent in female cockroaches
Present in males in the $6^{\text {th }}$ to $7^{\text {th }}$ abdominal segments
C. Spermatheca Present in female cockroaches in the $6^{\text {th }}$ abdominal segment
D. Anal style Absent in female cockroaches
Present in males and project backwardly from $9^{\text {th }}$ sternum
E. Phallic gland Absent in female cockroaches
Present in males as a large club shaped gland located below the ejaculatory duct and reaches anteriorly up to the $5^{\text {th }}$ abdominal segment.
Thus, only structures represented by 'A' and ' C ' are present in female cockroaches.
Whereas, structures indicated by ' $B$ ', ' $D$ ' and ' $E$ ' are present in males.
Options (1) and (2) are incorrect as these structures are present in males.
Option (3) is incorrect as it represents only a single structure which is present in female cockroaches.

Topic: Biology, Structural Organisation in Animals, NEET, NEET 2024 (Re-NEET)
Which of the following is/are used to induce parturition?

Options:
A Oxytocin
B Pitocin
C Estrogen
D Both A and B

The correct answer is:
Both A and B

Solution:
At the end of pregnancy and completion of full term, to induce labour and parturition, the doctor may inject oxytocin to woman. The synthetic oxytocin is called pitocin, which causes vigorous contraction of myometrium of uterus for expulsion of baby outside the mother body through vagina.

Topic: Biology, Human Reproduction, NEET
Which of the following is/are vectors for cloning in the eukaryotic organisms?

I. Plasmid
II. Bacteriophages
III. Ti plasmid
IV. Disarmed retrovirus.

Options:
A I and II
B II and III
C I , II and III
D All of these.

The correct answer is:
All of these.

Solution:
Vectors are carriers of DNA which are used to transfer gene of interest into the host cell. Vectors used at present are engineered in such a way that they help in easy linking of foreign DNA and selection of recombinants and non-recombinants. Plasmids and bacteriophages have the ability to replicate within the bacterial cells independent of the control of chromosomal DNA.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following isotopes were used in the Hershey-Chase experiments?

Options:
A 32S, 30P
B 31S, 29P
C 35S, 32P
D 34S, 33P

The correct answer is:
35S, 32P

Solution:
To know the chemical nature of genetic material Hershey and Chase performed experiment on T2 bacteriophage and E. coli. Hershey - Chase used radioactive isotope 35S of sulphur and 32P of phosphorus. Sulphur radioactivity was seen only in proteins and phosphorus radioactivity was seen only in nucleic acid DNA.

Topic: Biology, Molecular Basis of Inheritance, NEET
Which of the following joint permits only limited movements?

Options:
A Joint present between flat skull bones
B Joint present between adjacent vertebrae
C Joint present between humerus and pectoral girdle
D Knee joint

The correct answer is:
Joint present between adjacent vertebrae

Solution:
The joint present between adjacent vertebrae is known as 'cartilaginous joint.' The bones involved in this type of joint are connected together with the help of cartilage. These joints allow an only a limited range of movement.

Topic: Biology, Locomotion and Movement, NEET
Which of the following joints would allow no movement?

Options:
A Cartilaginous joint
B Synovial joint
C Ball and socket joint
D Fibrous joint

The correct answer is:
Fibrous joint

Solution:
Fibrous/Immovable/Synarthrose: In this type of joints there is no movement between the bones concerned. The characteristics of these joints are:

a. These are immovable or fixed joints.

b. Articulating bones are firmly held together by dense layer of white fibrous connective tissue.

c. They do not allow any movement.

d. The line of fusion at joint is called suture. E.g. sutures in skull, syndesmosis, gomphosis.

Topic: Biology, Locomotion and Movement, NEET, NEET 2015 (Phase 2)
Which of the following labeling in the structure of eyes contains three layers of cells?

Options:
A A-sclera
B A-cornea
C B-choroid
D C-retina

The correct answer is:
C-retina

Solution:
The inner layer of the eye is the retina and it contains three layers of cells – from inside to outside – ganglion cells, bipolar cells and photoreceptor cells.

Topic: Biology, Neural Control and Coordination, NEET
Which of the following labels show the only repolarization wave in the given diagram?

Options:
A P
B QRS
C T
D All of the above

The correct answer is:
T

Solution:
The P wave represents the depolarization of the left and right atrium and also corresponds to atrial contraction.
The QRS complex represents the electrical impulse as it spreads through the ventricles and indicates ventricular depolarization.
T wave follows the QRS complex and indicates ventricular repolarization.

Topic: Biology, Body Fluids and Circulation, NEET
Which of the following lanthanoid ions is diamagnetic?
(At. nos. $\mathrm{Ce}=58, \mathrm{Sm}=62, \mathrm{Eu}=63$, $\mathrm{Yb}=70$ )

Options:
A $\mathrm{Ce}^{2+}$
B $\mathrm{Sm}^{2+}$
C $\mathrm{Eu}^{2+}$
D $Yb^{2+}$

The correct answer is:
$Yb^{2+}$

Solution:
Lanthanoid ion with no unpaired electron is diamagnetic in nature.
$\begin{array}{ll}
\mathrm{Ce}_{58} & =[\mathrm{Xe}] 4 f^2 5 d^0 6 s^2 \\
C e^{2+} & =[\mathrm{Xe}] 4 f^2 \quad \text { (two unpaired electrons) }
\end{array}$
$\begin{aligned}
\mathrm{Sm}_{62} & =[\mathrm{Xe}] 4 f^6 5 d^0 6 s^2 \\
\mathrm{Sm}^{2+} & =[\mathrm{Xe}] 4 f^6 \quad(s i x \text { unpaired electrons) } \\
\mathrm{Eu}_{63} & =[\mathrm{Xe}] 4 f^7 5 d^0 6 s^2 \\
\mathrm{Eu}^{2+} & =[\mathrm{Xe}] 4 f^7 \quad \text { (seven unpaired electrons) } \\
\mathrm{Yb}_{70} & =\left[\mathrm{X}_e\right] 4 f^{14} 5 d^0 6 s^2 \\
\mathrm{Yb}^{2+} & =[\mathrm{Xe}] 4 f^{14} \quad \text { (no unpaired electrons) }
\end{aligned}$
Because of the absence of unpaired electrons, $\mathrm{Yb}^{2+}$ is diamagnetic.

Topic: Chemistry, d and f Block Elements, NEET, NEET 2013 (All India)
Which of the following lanthanoid ions is diamagnetic?
(At nos. Ce = 58, Sm = 62, Eu = 63, Yb = 70)

Options:
A Sm2+
B Eu2+
C Yb2+
D Ce2+

The correct answer is:
Yb2+

Solution:
Yb= Xe 54 4 f 14 5 d 0 6 s 2
Yb2+=[Xe]4f14
As n = 0 so diamagnetic.
As in rest other there are unpaired electron/s so they are paramagnetic.

Topic: Chemistry, d and f Block Elements, NEET
Which of the following lattices has the highest packing efficiency?

Options:
A Simple Cubic
B Body-Centred Cubic
C Hexagonal Close-Packed
D Face-Centred Cubic

The correct answer is:
Hexagonal Close-Packed

Solution:
Correct Option is : (C)
Hexagonal Close-Packed

Topic: Chemistry, Solid State, NEET
Which of the following laws do not show any deviation?

Options:
A Law of dominance
B Law of purity of gametes
C Law of independent assortment
D None

The correct answer is:
Law of purity of gametes

Solution:
Co-dominance and incomplete dominance are exceptions to the law of dominance. Linkage is the exception to law of independent assortment. Law of segregation (Law of purity of gametes) which states that in a hybrid, the members of an allelic pair stay together without mixing and separate or segregate independently during gamete formation, has no exceptions

Topic: Biology, Principles of Inheritance and Variation, NEET
Which of the following layer of uterus exhibits strong contraction during delivery of the baby?

Options:
A Mesometrium
B Myometrium
C Endometrium
D Perimetrium

The correct answer is:
Myometrium

Solution:
Perimetrium: outermost thin membranous layer of uterus.
Myometrium: Middle thick layer of smooth muscle which exhibits strong contraction during parturition.
Endometrium: Innermost glandular and vascular layer that lines the uterine cavity, undergo cyclic changes during menstrual cycle.

Topic: Biology, Human Reproduction, NEET
Which of the following layers in the wall of uterus does not undergo cyclical changes?

Options:
A Perimetrium only
B Myometrium only
C Perimetrium and Myometrium
D Endometrium only

The correct answer is:
Perimetrium and Myometrium

Solution:
The uterus is also called hystera or womb. It is an inverted pear-shaped structure. It is made up of three walls. The outer layer is perimetrium which is made up of thin connective tissue. The middle layer is myometrium which is made up of smooth muscles. The endometrium is the innermost layer which undergoes cyclic changes during menstrual cycle. The endometrium is further made up of two layers.

Topic: Biology, Human Reproduction, NEET
Which of the following layers of anther wall helps in protection as well as in the dehiscence of anther for the release of pollen grains?

Options:
A Epidermis
B Tapetum and endothecium
C Endothecium only
D Outer three layers of anther wall

The correct answer is:
Outer three layers of anther wall

Solution:
In a transverse section of anther, a typical microsporangium appears near circular in outline. It is generally surrounded by four wall layers the epidermis, endothecium, middle layers and the tapetum. The outer three wall layers perform the function of protection and help in dehiscence of anther to release the pollen. The innermost wall layer is the tapetum. It nourishes the developing pollen grains.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Which of the following levels of regulation of gene expression is predominant in prokaryotes?

Options:
A Translational level
B Processing level
C Transport level
D Transcriptional level

The correct answer is:
Transcriptional level

Solution:
In prokaryotes, control of the rate of transcriptional initiation is the predominant site for control of gene expression. The activity of RNA polymerase at a given promoter is regulated by interaction with accessory proteins, which affect its ability to recognise start sites.

Topic: Biology, Molecular Basis of Inheritance, NEET
Which of the following lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene?

Options:
A No lewis acid is added
B LiAlH4
C KOH
D FeCl3

The correct answer is:
FeCl3

Solution:
Correct Option is : (D)
FeCl3

Topic: Chemistry, Hydrocarbons, NEET
Which of the following Lewis acids is commonly used in the halogenation of arenes to yield haloarenes?

Options:
A HCl
B FeCl2
C FeCl3
D Cl2

The correct answer is:
FeCl3

Solution:
In the halogenation of arenes, Lewis acids like anhydrous FeCl3 are commonly used as catalysts to facilitate the reaction.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following Lewis dot structure of CO2 is incorrect?

Options:
A
B
C
D None of these

The correct answer is:

Solution:
CO2 can be represented as
A.
B. (Incorrect structure)
The correct structure is as follows

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which of the following liberates ammonia when treated with water?

Options:
A Li3N
B Mg3N2
C CaCN2
D All of these

The correct answer is:
All of these

Solution:
All these can give ammonia on reaction with water
Li3N+3HOH→NH3+3LiOH
Mg3N2+6HOH→2NH3+3Mg(OH)2
CaCN2+3HOH→2NH3+CaCO3

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following ligand gives chelate complexes?

Options:
A SCN-
B C2O42-
C Pyridine
D NH2-N+H3

The correct answer is:
C2O42-

Solution:
C2O42- is a symmetrical bidentate ligand so it can be used for chelate complex formation.
Pyridine, NH2-N+H3 are monodentate ligands so can not form chelate complex.
SCN- is an ambidentate ligand so only one site can be used at a time so no chelate complex is possible.

Topic: Chemistry, Coordination Compounds, NEET