datavorous/entrance-exam-dataset huggingface dataset:
Which of the following factors primarily contributes to the independence of relaxation time (τ) on the applied electric field, as well as the significant variation of relaxation time with temperature (T)?

Options:
A The negligible effect of the electric field on the velocities of electrons and ions compared to the significant effect of temperature on their velocities.
B The substantial impact of the electric field on the velocities of electrons and ions, leading to a constant relaxation time, whereas temperature affects the collisions between electrons and ions, resulting in a variable relaxation time.
C The simultaneous impact of the electric field and temperature on the velocities of electrons and ions, leading to the independence of relaxation time on the electric field and its variation with temperature.
D The influence of the electric field and temperature on the collisions between electrons and ions, causing a consistent relaxation time independent of both factors.

The correct answer is:
The negligible effect of the electric field on the velocities of electrons and ions compared to the significant effect of temperature on their velocities.

Solution:
Correct Option is : (A)
The negligible effect of the electric field on the velocities of electrons and ions compared to the significant effect of temperature on their velocities.

Topic: Chemistry, Current Electricity, NEET
Which of the following factors regulate human life with reference to population density?

Options:
A Availability of food, housing and health facilities
B Urbanisation
C Climatic conditions
D All the above

The correct answer is:
All the above

Solution:
In the last century, and all-around development in various fields significantly improved people's quality of life. However, increased health facilities, along with better living conditions with better climatic conditions, had an explosive impact on population growth.

Topic: Biology, Reproductive Health, NEET
Which of the following family can be associated with the characteristics given below?

(i) Racemose inflorescence.
(ii) Vexillary aestivation in corolla.
(iii) Bracteate, complete, bisexual, zygomorphic flower.

Options:
A Solanaceae
B Papilionaceae
C Brassicaceae
D Liliaceae

The correct answer is:
Papilionaceae

Solution:
The flowers of family Fabaceae show vexillary aestivation, which explains the Papilionaceous (butterfly-shaped) flower. It also shows the presence of diadelphous condition where the stamens are arranged in a (9) + 1 arrangement, meaning out of the 10 stamens, 9 are united in a bundle and one is free. Pisum sativum is an excellent example of this family showing both these characteristics precisely.

Topic: Biology, Morphology of Flowering Plants, NEET
Which of the following feature is associated with Cro-magnon man?

Options:
A beginning of agriculture
B developed speech centre
C cave painting and domestication of animals
D use of stone tools

The correct answer is:
cave painting and domestication of animals

Solution:
Discovered in 1868, Cro-Magnon was among the first fossils to be recognized as belonging to our own species-Homo sapiens. This famous fossil skull is from one of several modern human skeletons found at the famous rock shelter site at Cro-Magnon, near the village of Les Eyzies, France.
Painting were discovered in rock shelter of Bhimbetka.

Topic: Biology, Evolution, NEET
Which of the following feature is common among Nereis, Pheretima and Hirudinaria?

Options:
A Well developed clitellum for cocoon formation
B Chitinous setae and parapodia for locomotion
C Open circulatory system called haemocoel
D Coelomate and metamerically segmented animals

The correct answer is:
Coelomate and metamerically segmented animals

Solution:
Nereis-Clitellum absent, setae and parapodia present and closed circulatory system.
Pheretima-Clitellum well developed, only chitinous setae and closed circulatory system
Hirudinaria-Temporary clitellum, setae and parapodia absent and open circulatory system.
All the three are coelomates and are metamerically segmented animals.

Topic: Biology, Animal Kingdom, NEET
Which of the following feature is not applicable for red muscle fibres?

Options:
A It has high content of red colour oxygen storing pigment myoglobin.
B It also contain plenty of mitochondria for maximum ATP production.
C It has also high amount of sarcoplasmic reticulum.
D It is also called as aerobic muscles.

The correct answer is:
It has also high amount of sarcoplasmic reticulum.

Solution:
Red muscle fibres are aerobic muscle fibres with high amount of myoglobin, plenty of mitochondria which can utilise the large amount of oxygen stored in them for ATP production. These muscle fibres has low amount of sarcoplasmic reticulum.

Topic: Biology, Structural Organisation in Animals, NEET
Which of the following feature is responsible to make RNA more labile and easily degradable?

Options:
A Presence of Ribose sugar
B Presence of uracil instead of thymine
C Presence of 2′-OH group at every nucleotide
D Single stranded DNA molecule

The correct answer is:
Presence of 2′-OH group at every nucleotide

Solution:
The presence of the 2â²-OH group at every nucleotide makes the RNA less stable than the DNA. OH groups are highly reactive which makes RNA chemically promiscuous. DNA does not have a spare OH group in its sugar molecule. The only OH group is used up in the phosphodiester bonds.

Topic: Biology, Molecular Basis of Inheritance, NEET
Which of the following feature makes the RNA chemically more reactive and structurally less stable nucleic acid than DNA?

Options:
A Less rate of mutation.
B Indirect involvement in protein synthesis.
C Free 2' H group
D Catalytic nature

The correct answer is:
Catalytic nature

Solution:
RNA was the first genetic material. There are evidences to suggest that essential life processes, such as metabolism, translation, splicing etc. evolved around RNA. RNA used to act as a genetic material as well as a catalyst. There are some important biochemical reactions in living systems that are catalysed by RNA catalyst (ribozyme) and not by protein enzymes e.g., Ribonuclease P (Cleavage), Snurps (Splicing), Peptidyl transferase (peptide bond formation). But, RNA being a catalyst was reactive and hence unstable. Therefore, DNA has evolved from RNA with chemical modifications that make it more stable. DNA being double stranded and having complementary strand further resists changes by evolving a process of repair. RNA is adapter, structural molecule and in some cases catalytic. From above discussion it is very much clear both RNA and DNA can function as genetic material, but DNA being stable is preferred for storage of genetic material. For the transmission of genetic information RNA is better material.

Topic: Biology, Molecular Basis of Inheritance, NEET
Which of the following feature of halophiles, is used to differentiate them from eubacteria?

Options:
A Having different cell wall and cell membrane structure.
B They survival in extreme conditions.
C They belong to archaebacteria.
D All are correct.

The correct answer is:
All are correct.

Solution:
Halophiles, the name comes from the Greek word for "salt-loving," are a special type of bacteria that live in some of the harshest habitats such as extreme salty areas. These bacteria differ from other bacteria in having a different cell wall structure and this feature is responsible for their survival in extreme conditions.

Topic: Biology, Biological Classification, NEET
Which of the following feature of vector is required to identify the transformed cell?

Options:
A Selectable marker
B ori site
C Rop
D Restriction site

The correct answer is:
Selectable marker

Solution:
A selectable marker is essential in a cloning vector because it helps in identifying and eliminating non-transformants and selectively permitting the growth of the transformants.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following features are found in parasitic Platyhelminthes?

Options:
A They are free-living parasitic forms
B They have a tissue level of organisation
C Their digestive system is complete
D There is absence of excretory structures

The correct answer is:
They are free-living parasitic forms

Solution:
They are free-living parasitic forms.

Topic: Biology, Animal Kingdom, NEET
Which of the following features describes the figure given below?

Options:
A Monocarpellary, apocarpous
B Monocarpellary, syncarpous
C Multicarpellary, apocarpous
D Multicarpellary, syncarpous

The correct answer is:
Multicarpellary, syncarpous

Solution:
The given diagram is a flower of Papaver. It has a multicarpellary, syncarpous pistil.
Multicarpellary - more than one carpal
Syncarpous - pistils are fused together.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Which of the following features is common to prokaryotes and many eukaryotes?

Options:
A Chromatin material present
B Cell wall present
C Nuclear membrane present
D Membrane-bound subcellular organelles present

The correct answer is:
Cell wall present

Solution:
Cell wall is present in all prokaryotes (except mycoplasma. and many eukaryotes (like plants and fungi).

Topic: Biology, Cell - The Unit of Life, NEET
Which of the following features is correct about A?

(A) Endocrine gland.
(B) Lymphoid organ.
(C) It is a part of M.A.L.T.
(D) Maturation of T. lymphocyte and B lymphocytes.

Options:
A A, B, D
B B, C, D
C A, B only
D A, B, C, D

The correct answer is:
A, B only

Solution:
A = Endocrine gland (Thymus gland) are coming under Lymphoid organ Lymphocytes are concentrated in the lymph nodes. The spleen and the thymus are also lymphoid organs of the immune system.

Topic: Biology, Human Health and Diseases, NEET
Which of the following features is incorrectly described for prokaryotic cell in comparison to a eukaryotic cell?

Options:
A

Feature	Description
Cell size	smaller

B

Feature	Description
Multiplication	slow

C

Feature	Description
Ribosomes	70s, instead of 80s

D

Feature	Description
Centrioles	absent

The correct answer is:

Feature	Description
Multiplication	slow

Solution:
Features	Prokaryotic cells	Eukaryotic cells
1. Size	Small sized	Moderate to large sized
2. Cell wall	Usually present	Present/absent
3. Multiplication	Rapid	Generally not rapid
4. Nucleus	Genetic material is not membrane bound and is termed as nucleoid or incipient nucleus or genophore	Well defined membrane bound nucleus is present in which genetic material is present in the form of chromosomes

Topic: Biology, Cell - The Unit of Life, NEET
Which of the following features is not present in Periplaneta americana?

Options:
A Schizocoelom as body cavity
B Indeterminate and radial cleavage during embryonic development
C Exoskeleton composed of N-acetylglucosamine
D Metamerically segmented body

The correct answer is:
Indeterminate and radial cleavage during embryonic development

Solution:
Periplaneta americana shows indeterminate and spiral cleavage.

The developing embryo of a cockroach is called nymphs. This nymph undergoes morphological change around 13 times to attain an adult form. Nymphs don’t have wings, but the last two changes develop a structure called a wing pad. This mode of cockroach development by various nymphal stages is called paurometabolous.

Topic: Biology, Structural Organisation in Animals, NEET, NEET 2016 (Phase 1)
Which of the following features is not related to the cockroach?

Options:
A Body divisible into head, thorax and abdomen
B Two pairs of wings are found
C Three pairs of jointed legs are present on abdomen
D Presence of anal cerci in both sexes.

The correct answer is:
Three pairs of jointed legs are present on abdomen

Solution:
Thorax of Cockroach is made up of 3 segments - prothorax, mesothorax and metathorax. Neck is the anterior extension of prothorax. Thorax bears the following structures:
A. Legs -1 pair of jointed legs are found in each thoracic segment (6 in number - hexapod).
B. Wings -2 pairs of wings are found :1 pair of mesothoracic wings or tegmina (dark coloured, opaque and leathery, meant for covering of hindwings when at rest) and 1 pair of metathoracic wings (thin, membranous and true wings for flying).

Topic: Biology, Structural Organisation in Animals, NEET
Which of the following features is used to identify a male cockroach from a female cockroach?

Options:
A Forewings with darker tegmina
B Presence of caudal styles
C Presence of a boat shaped sternum on the 9th abdominal segment
D Presence of anal cerci

The correct answer is:
Presence of caudal styles

Solution:
In male cockroach, the 9th sternite bears a pair of small spine-like unjointed caudal or anal styles which are absent in female cockroach. The anal styles are believed to function as a motion detector.
Besides this, the other three characters, i.e. anal cerci, boat-shaped sternum on 9th abdominal segment and forewings with darker tegmina which are found in both male and female cockroaches.

Topic: Biology, Structural Organisation in Animals, NEET, NEET 2018
Which of the following features (P-S) can be observed in the eukaryotic chromosome?

P-Telomeres; Q-Centromere; R-Euchromatin; S-Origin of DNA replication

Options:
A P and Q
B P, Q and S
C P and S
D P, Q, R, and S

The correct answer is:
P, Q, R, and S

Solution:
Each eukaryotic chromosome can be divided into three different parts: the centromere, the arm, and the telomere. For the functioning of the chromosome, it contains DNA and a specific region called ori (Origin of Replication) is present in them. The coding part generally present as euchromatin in the DNA.
chromosomes.

Topic: Biology, Principles of Inheritance and Variation, NEET
Which of the following figures represent the variation of particle momentum and the associated de-Broglie wavelength?

Options:
A
B
C
D

The correct answer is:

Solution:
de-Broglie's wavelength, λ=hp
⇒pλ=h
⇒λp=h, Same as xy=c
Momentum, p∝1λ (Rectangular hyperbola)

Topic: Physics, Dual Nature of Matter, NEET, NEET 2015 (Phase 1)
Which of the following figures represents the variation of particle momentum and associated de-Broglie wavelength?

Options:
A
B
C
D

The correct answer is:

Solution:
âµ Î»=hp âÎ»â1p
ie, when Î» increases, p decreases.

Topic: Physics, Atomic Physics, NEET
Which of the following filamentous structures are a structural component of the centriole?

Options:
A Endoplasmic reticulum
B Microfilament
C Microtubule
D Golgi body

The correct answer is:
Microtubule

Solution:
Cytoplasm consists of different proteinaceous filamentous and tubular structure which are called as cyto skeleton, it includes microtubules and microfilaments. Microtubules are structural component of centriole and flagella.

Topic: Biology, Cell - The Unit of Life, NEET
Which of the following fish are oviparous and have direct development?

Options:
A Magur (Clarias)
B Angel fish (Pterophyllum)
C Rohu (Labeo)
D All of the above

The correct answer is:
All of the above

Solution:
All of the fish mentioned are oviparous and have direct development.

Topic: Biology, Animal Kingdom, NEET
Which of the following fish has a terminal mouth and four pairs of gills covered by an operculum on each side?

Options:
A Flying fish (Exocoetus)
B Sea horse (Hippocampus)
C Rohu (Labeo)
D Catla (Katla)

The correct answer is:
Flying fish (Exocoetus)

Solution:
Flying fish, also known as Exocoetus, possess all the characteristics mentioned in the description: a streamlined body, terminal mouth, four pairs of gills covered by an operculum on each side, etc.

Topic: Biology, Animal Kingdom, NEET
Which of the following fish species is found in freshwater?

Options:
A Flying fish (Exocoetus)
B Rohu (Labeo)
C Sea horse (Hippocampus)
D Fighting fish (Betta)

The correct answer is:
Rohu (Labeo)

Solution:
Rohu, also known as Labeo, is a freshwater fish species.

Topic: Biology, Animal Kingdom, NEET
Which of the following floral characteristics is not seen in the floral diagram?

Options:
A Aestivation of sepals and petals
B Placentation
C Number of stamens
D Position of ovary

The correct answer is:
Position of ovary

Solution:
A floral diagram provides information about the number of parts of a flower, their arrangement, and the relation they have with one another. The position of the mother axis is represented by a dot on the top of the floral diagram. A number of stamens and the type of placentation are shown but the position of ovary hypogynous, epigynous, or perigynous is not shown in the floral diagram but is shown in the floral formula.

Topic: Biology, Morphology of Flowering Plants, NEET
Which of the following flowers are pollinated by honey bees?

Options:
A Mulberry
B Fig
C Pear
D More than one option is correct

The correct answer is:
Pear

Solution:
Bees are the pollinators of many of our crop species such as sunflower, Brassica, apple, and pear.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
Which of the following flowers is unisexual?

Options:
A Cucumber
B China rose
C Onion
D Pea

The correct answer is:
Cucumber

Solution:
Flowers are unisexual in cucumber which belongs to the family of cucurbitaceae. The yellow or orange flowers on a cucurbita plant are of female and male types. The female flowers produce the fruit and the male flowers produce pollen.

Topic: Biology, Morphology of Flowering Plants, NEET, NEET 2015 (Phase 2)
Which of the following flowers is unisexual?

Options:
A Cucumber
B China rose
C Onion
D Pea

The correct answer is:
Cucumber

Solution:
Flowers are unisexual in cucumber which belongs to the family of cucurbitaceae. The yellow or orange flowers on a cucurbita plant are of female and male types. The female flowers produce the fruit and the male flowers produce pollen.

Topic: Biology, Morphology of Flowering Plants, NEET
Which of the following flowers is usually NOT used for the laboratory study of pollen germination?

Options:
A Crotolaria
B Vinca
C Balsam
D Cucumber

The correct answer is:
Cucumber

Solution:
Pollen germination can be easily studied by dusting some pollen from flowers such as pea, chickpea, Crotalaria, balsam and Vinca on a glass slide containing a drop of sugar solution (about 10 per cent). After about 15–30 minutes, observe the slide under the low power lens of the microscope. Pollen tubes are likely to be seen to be coming out of the pollen grains.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Which of the following flowers only once in its life-time?

Options:
A Mango
B Jackfruit
C Bamboo species
D Papaya

The correct answer is:
Bamboo species

Solution:
Bamboo plants are perennial, monocarpic plants. They flower only once in their lifetime, usually after 50-100 years. They produce a large number of fruits and die. Mango, Jackfruit, and Papaya are polycarpic plants. i.e. they flower repeatedly at regular intervals every year.

Topic: Biology, Reproduction in Organisms, NEET, NEET 2018
Which of the following flowers produce assured seed set even in the absence of pollinators?

Options:
A Viola, Commelina - Xenogamous flowers
B Viola, Oxalis - Cleistogamous flowers
C Tomato, chilli - Cleistogamous flowers
D Capsella, Brassica - Cleistogamous flowers

The correct answer is:
Viola, Oxalis - Cleistogamous flowers

Solution:
Cleistogamy ensures the pollination, and the flower is not dependent on any pollinating agent. Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers. This is especially well-known in Oxalis, Viola and Commelina.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Which of the following fluoride of xenon has zero dipole moment?

Options:
A XeF3
B XeF4
C XeF6
D XeF2

The correct answer is:
XeF4

Solution:
In XeF4 , the four fluorine atoms are present at the corners of a square plane and two lone pairs are present at axial positions. All the individual bond moments in such an arrangement cancel out, as a result, the molecule has zero dipole moment. Rest other are polar.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following fluoro-compounds is most likely to behave as a Lewis base?

Options:
A BF3
B PF3
C CF4
D SiF4

The correct answer is:
PF3

Solution:
Lewis base is a substance which can donate a lone pair of electrons.

In PF3, P has a lone pair of electrons.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET, NEET 2016 (Phase 2)
Which of the following forces can cause a change in the potential energy?

Options:
A Both conservative and non-conservative forces
B Conservative force only
C Non-conservative force only
D Neither conservative nor non - conservative forces.

The correct answer is:
Conservative force only

Solution:
In case of non-conservative forces, the work done is dissipated as heat, sound, etc., i.e., it does not increase the potential energy. But in case of conservative forces, work done is responsible for increasing or decreasing the potential energy.

Topic: Physics, Work Power Energy, NEET
Which of the following forests is known as the ‘lungs of the planet Earth’?

Options:
A Tiaga forest
B Tundra forest
C Amazon rain forest
D Rain forests of North East India

The correct answer is:
Amazon rain forest

Solution:
Amazon rain forest is known as the ‘lungs of the planet Earth’.

Topic: Biology, Biodiversity and its Conservation, NEET
Which of the following form the basis of fungal classification?

Options:
A The morphology of the mycelium.
B Mode of spore formation.
C Fruiting body
D All of the above

The correct answer is:
All of the above

Solution:
The morphology of the mycelium whether septate or aseptate, mode of spore formation and fruiting bodies forms the basis for the division of the kingdom Mycota into various classes.

Topic: Biology, Biological Classification, NEET
Which of the following forms a set of a complex and a double salt, respectively?

Options:
A $\mathrm{K}_2 \mathrm{PtCl}_2 \cdot 2 \mathrm{NH}_3$ and $\mathrm{KAl}\left(\mathrm{SO}_4\right)_2 \cdot 12 \mathrm{H}_2 \mathrm{O}$
B $\mathrm{NiCl}_2 \cdot 6 \mathrm{H}_2 \mathrm{O}$ and $\mathrm{NiCl}_2\left(\mathrm{H}_2 \mathrm{O}\right)_4$
C $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ and $\mathrm{CuCl}_2 \cdot 4 \mathrm{NH}_3$
D $\mathrm{PtCl}_2 \cdot 2 \mathrm{NH}_3$ and $\mathrm{PtCl}_4 \cdot 2 \mathrm{HCl}$

The correct answer is:
$\mathrm{K}_2 \mathrm{PtCl}_2 \cdot 2 \mathrm{NH}_3$ and $\mathrm{KAl}\left(\mathrm{SO}_4\right)_2 \cdot 12 \mathrm{H}_2 \mathrm{O}$

Solution:
$\mathrm{K}_2 \mathrm{PtCl}_2 \cdot 2 \mathrm{NH}_3$ is complex compound
$\mathrm{KAl}\left(\mathrm{SO}_4\right)_2 \cdot 12 \mathrm{H}_2 \mathrm{O}$ is empirical formula of potash alum which is a double salt $\mathrm{K}_2 \mathrm{SO}_4 \cdot \mathrm{Al}_2\left(\mathrm{SO}_4\right)_3 \cdot 24 \mathrm{H}_2 \mathrm{O}$

Topic: Chemistry, Coordination Compounds, NEET, NEET 2023 (Manipur)
Which of the following forms cationic micelles above certain concentration?

Options:
A Sodium dodecyl sulphate
B Sodium acetate
C Urea
D Cetyltrimethylammonium bromide

The correct answer is:
Cetyltrimethylammonium bromide

Solution:
Colloids which behave as normal electrolytes at low concentration, but exhibit colloidal properties at higher concentration due to the formation of aggregated particles called micelles. The micelles are formed by the association of dispersed particles above a certain concentration which is known as CMC. From the above compounds only Cetyltrimethyl ammonium bromide forms cationic micelles.

Topic: Chemistry, Surface Chemistry, NEET, NEET 2004
Which of the following forms micelles in aqueous solution above certain concentration?

Options:
A Dodecyltrimethylammonium chloride
B Glucose
C Urea
D Pyridinium chloride

The correct answer is:
Dodecyltrimethylammonium chloride

Solution:
Surfactants detergents form micelles in aqueous solution above to their critical micelle concentration. Dodecyl trimethyl ammonium chloride is an example of cationic surfactant.
Related Theory
A micelle is an aggregate of surfactant molecules dispersed in a liquid, forming $a$ colloidal suspension.

Topic: Chemistry, Surface Chemistry, NEET, NEET 2005