datavorous/entrance-exam-dataset huggingface dataset:
The statements are given below suits for,

Possess a protective shell or exoskeleton

Small-sized

Ability to fly

Produce large numbers of offsprings quickly.

Options:
A birds
B insects
C mammals
D reptiles

The correct answer is:
insects

Solution:
Insects are most successful because they show specific structural and morphological adaptations that permit them to escape from the predators, natural dispersal, and resisting environmental changes, as they have,

A protective shell or exoskeleton

A small-size

Ability to fly

Capacity to produce large numbers of offsprings quickly.

Topic: Biology, Animal Kingdom, NEET
The statements given below describe certain features that are observed in the pistil of flowers.
i. A pistil may have many carpels.
ii. Each carpel may have more than one ovule.
iii. Each carpel has only one ovule.
iv. A pistil has only one carpel.

Choose the statements that are true from the options.

Options:
A i and ii
B i and iii
C ii and iv
D iii and iv

The correct answer is:
i and ii

Solution:
â¢ Pistil may have many carpels (multicapellary pistil like Papaver).
â¢ Each carpel may have more than one ovule (like Watermelon, Papaya etc.).

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
The states of hybridization of boron and oxygen atoms in boric acid are respectively

Options:
A sp3 and sp3
B sp2 and sp2
C sp3 and sp2
D sp2 and sp3

The correct answer is:
sp2 and sp3

Solution:
In H3BO3 ,Boron has three bonds so sp2 hybridized. Each oxygen has two bonds and two lone pair so sp3 hybridized

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
The steady decreases in the ionic radius from L a 3+ to L u 3+ is termed as

Options:
A

lanthanoid contraction

B

actinoids contraction

C

Both of these

D

None of these

The correct answer is:

lanthanoid contraction

Solution:
The steady decreases in the ionic radius from L a 3+ to L u 3+ is termed as lanthanoid contraction.

Consequences are :

Similar physical chemical properties among Lanthanoids .

The almost identical radii of Zr (160 pm) and Hf (159 pm)

Topic: Chemistry, d and f Block Elements, NEET
The steady state current in| the circuit shown below is :

Options:
A 0.67 A
B 1.5 A
C 2 A
D 1 A

The correct answer is:
2 A

Solution:
At steady state, capacitor will be completely charged and will not allow current to pass through it. The simplified circuit will be :
$i=\frac{V}{R} \Rightarrow i=\frac{10}{2+3}=2 \mathrm{~A}$

Topic: Physics, Capacitance, NEET, NEET 2024 (Re-NEET)
The steam point and ice point of a mercury thermometer are marked as 80o and 10o . At what temperature on centigrade scale the reading of this thermometer will be 59o?

Options:
A 70oC
B 60oC
C 80oC
D none of these

The correct answer is:
70oC

Solution:
T′-1080-10=TC100
59-1080-10=TC100
TC=70oC

Topic: Physics, Thermal Properties of Matter, NEET
The stem with bicollateral vascular bundles and flowers with synandrous condition is found in

Options:
A Compositae
B Solanaceae
C Cucurbitaceae
D Asclepiadaceae

The correct answer is:
Cucurbitaceae

Solution:
In bicollateral vascular bundle, xylem is surrounded on both sides by phloem. In synandrous stamens, both anther lobes and filaments are fused. These conditions are characteristic of the Cucurbitaceae family.

Topic: Biology, Anatomy of Flowering Plants, NEET
The stems of maize and sugarcane have supporting roots coming out of the lower nodes of the stem. These are called

Options:
A prop roots
B stilt roots
C pneumatophores
D adventitious roots

The correct answer is:
stilt roots

Solution:
The stem of maize and sugarcane have supporting roots that come out from the lower nodes of the stem. These are called stilt roots. These roots grow obliquely towards the soil and it keeps the plant erect by giving additional support. Prop roots act as a pillar and arise from the horizontal branches and grow vertically downward. It is found in Ficus benghalensis (banyan tree). Pneumatophores are found in mangroves.

Topic: Biology, Morphology of Flowering Plants, NEET
The steps involved in the mechanism of muscle contraction are given below. Arrange the steps in proper sequential order and select the correct option.

I. Release of calcium ions in the sarcoplasm.
II. Signal sent by the CNS via a motor neuron.
III. Binding of calcium with a subunit of troponin on actin filaments.
IV. Generation of the action potential in the sarcolemma.
V. Binding of myosin head to the exposed active sites on actin to form a cross-bridge.
VI. Inward pulling of 'Z' line attached to actin causing shortening of the sarcomere.
VII. Pulling of the attached actin filaments towards the centre of 'A' band.
VIII. Release of neurotransmitter acetylcholine and generation of the action potential in the sarcolemma.

Options:
A III, II, V, I, IV, VI, VII, VIII
B II, VIII, IV, I, III, V, VII, VI
C I, VIII, VI, II, V, IV, III, VII,
D II, IV, V, I, III, VII, VIII, VI

The correct answer is:
II, VIII, IV, I, III, V, VII, VI

Solution:
The mechanism of muscle contraction is as follows:
1. Signal sent by the CNS via a motor neuron
2. Release of neurotransmitter acetylcholine and generation of the action potential in the sarcolemma
3. Generation of the action potential in the sarcolemma
4. Release of calcium ions in the sarcoplasm
5. Release of calcium ions in the sarcoplasm
6. Binding of myosin head to the exposed active sites on actin to form a cross-bridge
7. Pulling of the attached actin filaments towards the centre of 'A' band.
8. Inward pulling of 'Z' line attached to actin causing shortening of the sarcomere.

Topic: Biology, Locomotion and Movement, NEET
The steps involved in the mechanism of vision are given below. Arrange them in proper sequence and select the correct option.

A. Dissociation of retinal from opsin and generation of potential difference in photoreceptor cells.
B. Focusing of the light rays in visible wavelengths on the cornea through the lens.
C. Generation of the action potential in ganglion cells through bipolar cells.
D. Analysis of neural impulses and formation of an image on the retina.
E. Transmission of the action potential by the optic nerve to the visual cortex.

Options:
A A, C, E, D, B,
B B, A, C, D, E,
C B, A, C, E, D
D C, B, A, D, E

The correct answer is:
B, A, C, E, D

Solution:
The steps involved in the mechanism of vision are as follows:
1. Focusing of the light rays in visible wavelengths on the cornea through the lens.
2. Dissociation of retinal from opsin.
3. Generation of potential difference in photoreceptor cells.
4. Generation of the action potential in ganglion cells through bipolar cells.
5. Transmission of the action potential by the optic nerve to the visual cortex.
6. Analysis of neural impulses and formation of an image on the retina.

Topic: Biology, Neural Control and Coordination, NEET
The step/s that is/are associated with ATP formation during substrate level phosphorylation is

Options:
A Succinyl CoA â Succinic acid
B 1,3 diPGA â 3PGA
C PEP â Pyruvate
D All of these

The correct answer is:
All of these

Solution:
Respiration is the process or mechanism to break down food molecules to release energy in the form of ATP. During the process of aerobic respiration, phosphorylation of ADP occurs forming the energy currency molecule - Adenosine triphosphate. The energy required for the production of proton gradient which is needed for phosphorylation is obtained from the oxidation-reduction of the molecules. Such phosphorylation step is called substrate level phosphorylation. One of the steps of the respiration process is glycolysis where 6C-glucose is broken down to 3C-pyruvate. During glycolysis, substrate level phosphorylation occurs at two steps. Conversion of 1,3-diphosphoglyceric acid to 3-phosphoglyceric acid by losing a phosphate group (used in making ATP) catalyzed by enzyme phosphoglycerokinase. Pyruvate kinase hydrolyses phosphoenol pyruvate to pyruvic acid where PEP loses phosphate group which is used in making ATP.
Also, during Kreb's cycle in the step of hydrating succinyl coenzyme A to succinic acid energy is liberated. This energy is used in formation of GTP from GDP but it is quite unstable. Thus, it is transformed to ATP. This process of ATP formation is by substrate level phosphorylation.

Topic: Biology, Respiration in Plants, NEET
The steroid responsible for the balance of water and electrolytes in our body is

Options:
A Insulin
B Melatonin
C Testosterone
D Aldosterone

The correct answer is:
Aldosterone

Solution:
Option (d) is the answer.

Topic: Biology, Chemical Coordination and Integration, NEET
The stirrer in the stirred-tank bioreactors have been designed for:

Options:
A Purification of product
B Addition of preservatives to the product
C Availability of oxygen throughout the process
D Ensuring anaerobic condition in the culture vessel.

The correct answer is:
Availability of oxygen throughout the process

Solution:
A stirred-tank reactor is usually cylindrical or with a curved base to facilitate the mixing of the reactor contents. The stirrer facilitates, even mixing and oxygen availability throughout the bioreactor.

Topic: Biology, Biotechnology - Principles and Processes, NEET
The stomatal aperture, guard cells and the surrounding subsidiary cells together are called ___.

Options:
A Stomatal apparatus
B Stomatal aperture
C Guard cells
D Subsidiary cells

The correct answer is:
Stomatal apparatus

Solution:
The stomatal aperture, guard cells and the surrounding subsidiary cells together are called Stomatal apparatus.

Topic: Biology, Anatomy of Flowering Plants, NEET
The stopping potential as a function of frequency of incident radiation is plotted for two different photoelectric surfaces A and B . The graphs show that the work function of A is

Options:
A greater than that of B
B smaller than that of B
C same as that of B
D such that no comparison can be done from given graphs

The correct answer is:
smaller than that of B

Solution:
We know that E=w+kE
hv=hv0+eV0
v0=hve-hv0e
From graph, we can see that v0 is less for A and greater for B .
Hence work function of A is less than B .

Topic: Physics, Dual Nature of Matter, NEET
The straight chain polymer is formed by

Options:
A hydrolysis of $\left(\mathrm{CH}_3\right)_3 \mathrm{SiCl}$ followed by condensation polymerisation
B hydrolysis of $\mathrm{CH}_3 \mathrm{SiCl}_3$ followed by condensation polymerisation
C hydrolysis of $\left(\mathrm{CH}_3\right)_4 \mathrm{Si}$ by addition polymerisation
D hydrolysis of $\left(\mathrm{CH}_3\right)_2 \mathrm{SiCl}_2$ followed by condensation polymerisation

The correct answer is:
hydrolysis of $\left(\mathrm{CH}_3\right)_2 \mathrm{SiCl}_2$ followed by condensation polymerisation

Solution:
$\mathrm{RSiCl}_3$ (trichloro derivatives) on hydrolysis followed by condensation polymerisation yields branched chain silicones.
Straight chain silanes are silicone oils. These are more stable at high temperature than mineral oils and have less tendency to thicken at low temperature.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET, NEET 2009 (Screening)
The stream of a river is flowing with a speed of 2 km h-1. A swimmer can swim at a speed of 4 km h-1. The direction of the swimmer with respect to the flow of the river, to cross the river straight, is

Options:
A 150°
B 90°
C 120°
D 60°

The correct answer is:
120°

Solution:
To reach the point directly opposite to the starting point, the resultant velocity of swimmer should be as shown in figure.

From figure
sinâ¡Î¸=24=12
Î¸=30Â°
Angle with flow =90Â°+30Â°=120Â°

Topic: Physics, Motion In Two Dimensions, NEET
The strength in volumes of a solution containing 30.36 g/L of H2O2 is
(Given volume of 1 mole of gas at STP = 22.4 litre)

Options:
A 10 volume
B 20 volume
C 5 volume
D None of these

The correct answer is:
10 volume

Solution:
Strength of H2O2 in g/L =6822.4ÃV
Given strength of H2O2 = 30.36 g/L
V=30.36 Ã 22.468
=10 volumes

Topic: Chemistry, s Block Elements, NEET
The strength of 10-2 M Na2CO3 solution interms of molality will be (density of the solution =1.10 gml-1 )
M. wt Na 2 CO 3 =106

Options:
A 9×10-3
B 1.15×10-2
C 5.1×10-3
D 11.2×10-3

The correct answer is:
9×10-3

Solution:
m=17×1000(1000×d-17×M.W)
m=10-2×10001000×1.1-10-2×106=101099.4=9×10-3

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
The strength of the magnetic field around a long straight wire, carrying current, is

Options:
A Same everywhere around the wire at any distance
B Inversely proportional to the distance from the wire
C Inversely proportional to the square of the distance from the wire
D Directly proportional to the square of the distance from the wire

The correct answer is:
Inversely proportional to the distance from the wire

Solution:
The strength of magnetic field around a straight current carrying wire is given by
B=μ02π .Ir
∴ B∝1r
Therefore, magnetic field due to a straight current carrying wire is inversely proportional to the distance from the wire.

Topic: Physics, Magnetic Effects of Current, NEET
The stress-strain curves are drawn for two different materials $\mathrm{X}$ and $\mathrm{Y}$. It is observed that the ultimate strength point and the fracture point are close to each other for material X but are far apart for material Y. We can say that materials $\mathrm{X}$ and $\mathrm{Y}$ are likely to be (respectively)

Options:
A ductile and brittle
B brittle and ductile
C brittle and plastic
D plastic and ductile

The correct answer is:
brittle and ductile

Solution:
$$
\text { The stress-strain curve for a material is shown }
$$
$$
\text { This curve specifies the behaviour of material. }
$$
For the material, if distance between strength point and fracture point is small, so it is brittle and will break easily on the application of some extra stress after point D.
For material $\mathrm{Y}$, if the distance between strength point and fracture point is large, so it is a ductile material and can withstand for some extra stress beyond point $\mathrm{D}$.

Topic: Physics, Mechanical Properties of Solids, NEET, NEET 2019 (Odisha)
The structural adaptions observed in placental mice, in North America, are very similar in appearance to marsupial mice in Australia. It is an example of

Options:
A Divergent evolution
B Parallel evolution
C Homology
D Analogy

The correct answer is:
Parallel evolution

Solution:
The observation that placental mice in North America are very similar in appearance to marsupial mice in. Australia, even though they are not closely related to one another, is an example of convergent or parallel evolution. [In evolutionary biology, convergent evolution is the process whereby organisms not closely related (not monophyletic), independently evolve similar traits as a result of having to adapt to similar environments or ecological niches].

Topic: Biology, Evolution, NEET
The structural and regulatory proteins of muscles are

Options:
A

Structural	Regulatory

Troponin	Tropomysin

B

Structural	Regulatory

Troponin	Actin

C

Structural	Regulatory

Tropomyosin	Actin

D

Structural	Regulatory

Actin	Troponin

The correct answer is:

Structural	Regulatory

Actin	Troponin

Solution:
Actin: A protein that makes up most of the thin myofilaments in a sarcomere muscle fiber.
Troponin: A regulatory protein that binds to actin, tropomyosin, and calcium.
Tropomyosin: A regulatory protein that covers myosin-binding sites to prevent actin from binding to myosin.

Topic: Biology, Locomotion and Movement, NEET
The structural formula of isopropyl carbinol is –

Options:
A CH32CHOH
B CH3-CHOH-CH2-CH3
C CH32CH.CH2OH
D CH32COH

The correct answer is:
CH32CH.CH2OH

Solution:

Topic: Chemistry, General Organic Chemistry, NEET
The structure given below is known as

Options:
A prontosil
B sulphapyridine
C chloramphenicol
D chloroxylenol

The correct answer is:
chloramphenicol

Solution:
This is the structure of Chloramphenicol.

Topic: Chemistry, Chemistry in Everyday Life, NEET
The structure given below is known as

Options:
A Penicilline F
B Penicillin G
C Penicillin K
D Sulphadiazine

The correct answer is:
Penicillin G

Solution:
It is the known structure of penicillin G

Topic: Chemistry, Chemistry in Everyday Life, NEET
The structure of [BeF4]2- is

Options:
A tetrahedral
B octahedral
C square planar
D linear

The correct answer is:
tetrahedral

Solution:
The structure of [BeF4]2- is tetrahedral
The Be atom is sp3 -hybridized.
Electronic structure of beryllium in [BeF2]
[Two unpaired electrons form covalent bonds ( σ -bonds) with two F atoms]
Electronic structure of beryllium in [BeF4]2-
[Two F- ions, each donate an electron pair into empty sp3 -hybrid orbital forming a coordinate bond].

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
The structure of compound, which is formed by sp3d hybridization will be

Options:
A Angular
B Planar
C Pyramidal
D Trigonal bipyramidal

The correct answer is:
Trigonal bipyramidal

Solution:
Structure of sp3d hybridized compound is Trigonal bipyramidal.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
The structure of H2O2 is:

Options:
A Spherical
B Non - planar
C Planar
D Linear

The correct answer is:
Non - planar

Solution:
In H2O2, the O - H groups are not in the same plane. So, it has non - planar structure. It has a half - opened book structure in which the two O - H groups lie on the two pages of the book. The angle between two pages of the book is 94o and H - O - O bond angle is 97o.

Topic: Chemistry, s Block Elements, NEET
The structure of intermediate A in the following reaction, is:

Options:
A
B
C
D

The correct answer is:

Solution:
Phenol is manufactured from the hydrocarbon, cumene. Cumene (isopropyl benzene) is oxidized in the presence of air to cumene hydroperoxide. It is converted to phenol and acetone by treating it with dilute acid.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET, NEET 2019 (All India)
The structure of isobutyl group in an organic compound is

Options:
A

B

C

D

The correct answer is:

Solution:
'/so' mean one Me group is present in six chain. Hence, the structure of iso-butyl group in an organic compound is
('yl' suffix is used to represent one $-\mathrm{H}$ less than the parent hydrocarbon.)

Topic: Chemistry, Hydrocarbons, NEET, NEET 2013 (All India)
The structure of Oxirane is
The reaction of Oxirane with RMgX followed by hydrolysis will lead to product?

Options:
A RCHOHR
B RCHOHCH3
C R2CHCH2OH
D RCH2CH2OH

The correct answer is:
RCH2CH2OH

Solution:

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
The structure of the ecosystem is comprised of

Options:
A Input of energy
B Output of energy
C Transfer of energy
D All of these

The correct answer is:
All of these

Solution:
The structure of the ecosystem is appreciated with the input (productivity), transfer of energy (food chain/web, nutrient cycling) and the output (degradation and energy loss) of energy.

Topic: Biology, Ecosystem, NEET
The structure of the human eye having three layers of cells are

Options:
A Cornea
B Ciliary body
C Sclera
D Retina

The correct answer is:
Retina

Solution:
The inner layer of the eye is the retina and it contains three layers of cells namely ganglionic cell which is innermost, bipolar cells is the middle layer and photoreceptor cells are the outermost layer.
A circular field of approximately 6 mm around the fovea is considered the central retina while beyond this is peripheral retina stretching to the ora Serrata, 21 mm from the center of the retina (fovea). The total retina is a circular disc of between 30 and 40 mm in diameter.

Topic: Biology, Neural Control and Coordination, NEET
The structure of triphenylmethyl cation is given below. This is very stable and some of its salts can be stored for months. Explain the cause of high stability of this cation.

Options:
A Stabilised due to three possible canonical structures.
B Stabilised due to sixteen possible canonical structures.
C Stabilised due to five possible canonical structures.
D Stabilised due to nine possible canonical structures.

The correct answer is:
Stabilised due to nine possible canonical structures.

Solution:
Correct Option is : (D)
Stabilised due to nine possible canonical structures.

Topic: Chemistry, General Organic Chemistry, NEET
The structure present between the outer covering of endosperm and the embryo is called

Options:
A aleurone layer
B scutellum
C seed coat
D coleoptile

The correct answer is:
aleurone layer

Solution:
Generally, monocotyledonous seeds are endospermic but some as in orchids are non-endospermic. In the seeds of cereals such as maize the seed coat is membranous and generally fused with the fruit wall. The endosperm is bulky and stores food. The outer covering of endosperm separates the embryo by a proteinous layer called aleurone layer. The embryo is small and situated in a groove at one end of the endosperm. It consists of one large and shield shaped cotyledon known as scutellum and a short axis with a plumule and a radicle. The plumule and radicle are enclosed in sheaths which are called coleoptile and coleorhiza, respectively.

Topic: Biology, Morphology of Flowering Plants, NEET
The structure that is present in the 9th abdominal segment of cockroach is?

Options:
A anal styles in male.
B anal cerci in female.
C anal style and antennae in female.
D Both (A) and (C)

The correct answer is:
anal styles in male.

Solution:
In cockroach males, the genital pouch or chamber lies at the hind end of the abdomen bounded dorsally by the 9th and 10th terga and ventrally by the 9th sternum. It contains a dorsal anus, ventral male genital pore, and gonapophysis. Males bear a pair of short, threadlike anal styles in the 9th abdominal segment which are absent in females. In both sexes, the 10th segment bears a pair of jointed filamentous structures called anal cerci.

Topic: Biology, Structural Organisation in Animals, NEET
The structure that lies at the base of thalamus in the human brain is

Options:
A the structure responsible for the synthesis of oxytocin
B the structure which forms the major part of brain
C the association area
D the amygdala

The correct answer is:
the structure responsible for the synthesis of oxytocin

Solution:
The thalamus, hypothalamus and epithalamus form the diencephalon. Epithalamus forms the roof, while the hypothalamus forms the floor of diencephalon; this structure is responsible for the synthesis of oxytocin.

Topic: Biology, Neural Control and Coordination, NEET
The structure which attaches the ovaries with the dorsal wall is known as

Options:
A Tunica serosa
B Mesovarium
C Mesorchium
D Glisson's capsule

The correct answer is:
Mesovarium

Solution:
Each ovary is surrounded by mesovarium or fold of peritoneum for suspending it to dorsal body wall.

Topic: Biology, Human Reproduction, NEET
The structure which is lateral and generally flattened, borne on stem is known as __________

Options:
A Root
B Branch
C Leaf
D Flower

The correct answer is:
Leaf

Solution:
Leaves of plants develop laterally and are generally flattened structures. These help in processes like photosynthesis and transpiration. In some plants, leaves are modified into spines and tendrils for support and protection.

Topic: Biology, Morphology of Flowering Plants, NEET
The structure which provides vascular connection between foetus and uterus is called___.

Options:
A amniotic sac
B vagina
C hymen
D placenta

The correct answer is:
placenta

Solution:
The structure which provides vascular connection between the fetus and uterus is called placenta.

Topic: Biology, Human Reproduction, NEET
The structures of beryllium chloride, in solid state and vapour phase, are:

Options:
A Chain and dimer, respectively
B Linear in both
C Dimer and Linear, respectively
D Chain in both

The correct answer is:
Chain and dimer, respectively

Solution:
In solid state, BeCl2 has polymeric chain structure:

In, vapour state, BeCl2 has dimeric structure

Topic: Chemistry, s Block Elements, NEET, NEET 2021