datavorous/entrance-exam-dataset huggingface dataset:
Which of the following parameters are responsible for increasing the population?

Options:
A Natality and Mortality
B Mortality and Natality
C Natality and Immigration
D Mortality and Immigration

The correct answer is:
Natality and Immigration

Solution:
Population density will increase if the number of births plus the number of immigrants (B + I) is more than the number of deaths plus the number of emigrants (D + E). Under normal conditions, births and deaths are the most important factors influencing population density, the other two factors assuming importance only under special conditions. For instance, if a new habitat is just being colonised, immigration may contribute more significantly to population growth than birth rates.

Topic: Biology, Organisms and Populations, NEET
Which of the following parameters does not characterize the thermodynamic state of matter?

Options:
A Temperature
B Pressure
C Work
D Volume

The correct answer is:
Work

Solution:
The work does not characterize the thermodynamics state of matter.

Topic: Physics, Thermodynamics, NEET
Which of the following parameters would be expected to have the same values for the structural isomers C2H5OH and CH3OCH3 ? (Assume ideal behaviour)

Options:
A Boiling points
B Vapour pressure at the same temperature
C Heat of vaporization
D Gaseous densities at the same temperature and pressure

The correct answer is:
Gaseous densities at the same temperature and pressure

Solution:
Gaseous density of both ethanol and dimethyl ether would be same under identical condition of temperature and pressure while the rest of these three properties vapour pressure, boiling point and heat of vaporization will differ as ethanol has hydrogen bonding whereas ether does not.

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following part of cochlea will be filled with endolymph?

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

The correct answer is:
scala media

Solution:
The inner ear or labyrinth has two parts, outer bony labyrinth and the inner membranous labyrinth. The space between the two is filled with perilymph. The coiled part of the labyrinth is called cochlea. It has two membranes: Reissner's membrane and basilar membrane. They divide the cochlea into upper scala vestibule, middle scala media and lower scala tympani. Out of these, scala media has endolymph, while scala vestibuli and scala tympani have perilymph.

Topic: Biology, Neural Control and Coordination, NEET
Which of the following part of the human brain is also called an emotional brain?

Options:
A Corpus callosum
B Limbic system
C Epithalamus
D Broca's area

The correct answer is:
Limbic system

Solution:
Limbic system present on the inner border of cerebrum a floor of diencephalon is also called emotional brain or animal brain. It controls emotion, animal behaviour like sniffing, sexual feelings, pain, pleasure, etc.

Topic: Biology, Neural Control and Coordination, NEET
Which of the following part of the internal ear is not linked with balancing?

Options:
A Cochlea
B Saccule
C Utricle
D Semicircular canals

The correct answer is:
Cochlea

Solution:
The internal ear is made up of cochlea and vestibular apparatus ( = Saccule + Utricle + 3 Semicircular canals). The cochlea is meant for hearing while the vestibular apparatus is meant for balancing.

Topic: Biology, Neural Control and Coordination, NEET
Which of the following particle will describe the smallest circle when projected with the same velocity perpendicular to the magnetic field?

Options:
A Proton
B He+
C Li+
D Electron

The correct answer is:
Electron

Solution:
We know that,
Radius of circular path R=mvqB
Here, v, q and B are same.
So, R∝m.
The mass of electron is minimum. So, electron will describe the smallest circle when projected with same velocity perpendicular to magnetic field.

Topic: Physics, Magnetic Effects of Current, NEET
Which of the following particles cannot emit radiation, and why?

Options:
A Excited nucleus
B Excited electron
C Both excited nucleus and electron
D None of the above

The correct answer is:
Excited electron

Solution:
Correct Option is : (B)
Excited electron

Topic: Chemistry, Nuclear Physics, NEET
Which of the following parts are used for the development of fruit in mango and coconut?

Options:
A Polycarpellary superior ovaries and is one seeded
B Polycarpellary superior ovaries and are many seeded
C Monocarpellary superior ovaries and are one seeded
D Monocarpellary inferior ovaries and are many seeded

The correct answer is:
Monocarpellary superior ovaries and are one seeded

Solution:
Drupe fruits are also called stone fruits because comparatively hard seed is developed inside the fruit. This fruit is usually single seeded. In mango and coconut, this drupe fruit is formed by monocarpellary (single carpel), superior ovary (hypogynous flower) and are usually one seeded. Polycarpellary ovary is usually form compound fruit.

Topic: Biology, Morphology of Flowering Plants, NEET
Which of the following parts of the alimentary canal helps in providing immunity?

Options:
A Auerbach's Plexus
B Meissner's Plexus
C Peyer's Patches
D Brunner's glands

The correct answer is:
Peyer's Patches

Solution:
The alimentary canal is composed of four tissue layers one of which is mucosa which is referred to as mucous membrane. This membrane consists of connective tissue which contains lymphatic vessels. Peyer's patches are masses of lymphoid follicles that line the small intestine. They play an important role in the recognition and destruction of potential pathogens. Brunner's gland protects the intestinal wall from gastric juices. Auerbach's plexus helps in the peristaltic movement of the bowels whereas the Meissner's plexus controls the glandular secretions.

Topic: Biology, Human Health and Diseases, NEET
Which of the following parts of the flower are incorrectly matched?

Options:
A Microsporophyll - stamen
B Microspore - pollen grain
C Megasporophyll- carpel
D Megaspore - ovule

The correct answer is:
Megaspore - ovule

Solution:
Microsporophylls are leaf like structures which bear microspores (pollen grains). These structures are stamens which form the male reproductive whorl: androecium. Megasporophylls are leaf like structures which bear megaspores. These structures are carpels which form the female reproductive whorl: gynoecium. Ovule is the integumented megasporangium.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Which of the following parts of the human eye comprises of densely packed cones?

Options:
A Fovea
B Blind spot
C Macula lutea
D Retina

The correct answer is:
Fovea

Solution:
The optic nerves leave the eye and the retinal blood vessels enter it at a point medial to and slightly above the posterior pole of the eye ball. Photoreceptor cells are not present in that region and hence it is called the blind spot. At the posterior pole of the eye lateral to the blind spot, there is a yellowish pigmented spot called macula lutea with a central pit called the fovea. The fovea is a thinned-out portion of the retina where only the cones are densely packed. It is the point where the visual acuity (resolution) is the greatest.

Topic: Biology, Neural Control and Coordination, NEET
Which of the following parts of the sperm provides energy for its motility?

Options:
A The head
B The neck
C The tail
D The middle piece

The correct answer is:
The middle piece

Solution:
The middle piece of the sperm contains numerous mitochondria, the powerhouse of the cell. These mitochondria supply sperm with the energy, which it requires for its motility and fertilizing capacity.

Topic: Biology, Human Reproduction, NEET
Which of the following pentahalides is not formed?

Options:
A NF5
B PF5
C AsF5
D BiF5

The correct answer is:
NF5

Solution:
Owing to the non-availability of d-orbital in its valence shell, N cannot expand its octet and, therefore, it cannot form NF5 .

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following phases do not take place in a cell exhibiting a syncytium?

Options:
A Cytokinesis
B Karyokinesis
C Interphase
D None of these

The correct answer is:
Cytokinesis

Solution:
In some organisms, karyokinesis is not followed by cytokinesis, as a result of which multinucleate condition arises leading to the formation of syncytium (eg. liquid endosperm in coconut).

Topic: Biology, Cell Cycle and Cell Division, NEET
Which of the following phenomenon can be found only when population studies are conducted?

Options:
A Multiple allelism
B Codominance
C Incomplete dominance
D Pleiotropy

The correct answer is:
Multiple allelism

Solution:
Three or more alternative forms of a gene (alleles) can occupy the same locus. However, only two of the alleles can be present in a single organism. For example, the ABO system of blood groups is controlled by three alleles, only two of which are present in an individual. To study all the alleles of a gene type, one must take the whole population into consideration.

Topic: Biology, Principles of Inheritance and Variation, NEET
Which of the following philosophers was the earliest to attempt a more scientific basis for classification?

Options:
A Plato
B Aristotle
C Descartes
D Kant

The correct answer is:
Aristotle

Solution:
Aristotle was the first one to give 2 Kingdom system of classification in which all the organisms were classified in either of 2 Kingdoms animalia and plantae

Topic: Biology, Biological Classification, NEET
Which of the following phosphorus is the most reactive?

Options:
A Scarlet phosphorus
B White phosphorus
C Red phosphorus
D Violet phosphorus

The correct answer is:
White phosphorus

Solution:
White phosphorus has a low ignition temperature due to high angle strain. So, it is most reactive among all the allotropes.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following phosphorylation occurs in power house of eukaryotic cell?

Options:
A Oxidative phosphorylation
B Substrate level phosphorylation
C Photophosphorylation
D Both (a) and (b)

The correct answer is:
Both (a) and (b)

Solution:
The powerhouse of the eukaryotic cell is mitochondria. The formation of ATP directly in the metabolic reaction is called substrate-level phosphorylation or transphosphorylation. It occurs when succinyl CoA is converted to succinic acid in Kreb's cycle, thus producing 1 ATP. The energy of oxidation and reduction is utilized form formation of ATP during an electron transport system this is called oxidative phosphorylation. Maximum ATP is generated through oxidative phosphorylation.

Topic: Biology, Respiration in Plants, NEET
Which of the following photo diodes, D1, D2, and D3, made of semiconductors with band gaps of 2.5eV, 2eV, and 3eV respectively, will be able to detect light of wavelength 6000 Å?

Options:
A D1 only
B D2 only
C D3 only
D Both D1 and D3

The correct answer is:
D2 only

Solution:
Correct Option is : (B)
D2 only

Topic: Chemistry, Semiconductors, NEET
Which of the following phylum have organisms that are exclusively marine?

Options:
A Aschelminthes
B Echinodermata
C Arthropoda
D Annelida

The correct answer is:
Echinodermata

Solution:
Members of this phylum are found in the Ocean and never been reported in freshwater resources like river stream etc.

Topic: Biology, Animal Kingdom, NEET
Which of the following phylum possess multicellular, organ grade level of organisation?

1. Platyhelminthes

2. Porifera

3. Nematode

4. Protozoa

Options:
A 1, 2 and 3 are correct
B 1 and 2 are correct
C 2 and 4 are correct
D 1 and 3 are correct

The correct answer is:
1 and 3 are correct

Solution:
Though all members of Animalia are multicellular, all of them do not exhibit the same pattern of organisation of cells. For example, in sponges, the cells are arranged as loose cell aggregates, i.e., they exhibit cellular level of organisation. In coelenterates, the arrangement of cells is more complex. Here the cells performing the same function are arranged into tissues, hence is called tissue level of organisation. Organ level is exhibited by members of Platyhelminthes and other higher phyla where tissues are grouped together to form organs, each specialised for a particular function.

Topic: Biology, Animal Kingdom, NEET
Which of the following phylum the vector responsible for the transmission of malaria belongs to?

Options:
A Arthropoda
B Mollusca
C Porifera
D Echinodermata

The correct answer is:
Arthropoda

Solution:
Arthropoda is the largest phylum of Kingdom Animalia. It includes insects. One-third of the species present on earth include arthropods, e.g., Anopheles, Aedes, Culex, Locusta, etc. Mollusca is the phylum that has the second largest number of organisms.

Topic: Biology, Animal Kingdom, NEET
Which of the following physical quantities has neither dimensions nor unit?

Options:
A Angle
B Luminous intensity
C Coefficient of friction
D Current

The correct answer is:
Coefficient of friction

Solution:
Coefficient of friction = Applied force Normal reactiom
= MLT - 2 MLT - 2 = no dimensions
Unit = N N = no unit

Topic: Physics, Units and Dimensions, NEET
Which of the following physical quantities has neither dimensions nor unit?

Options:
A Angle
B Luminous intensity
C Coefficient of friction
D Current

The correct answer is:
Coefficient of friction

Solution:
Coefficient of friction = Applied force Normal reactiom
=MLT-2MLT-2= no dimensions
Unit=NN= no unit

Topic: Physics, Units and Dimensions, NEET
Which of the following physiological effects is caused in plants by gibberellic acid?

Options:
A Shortening of genetically tall plants
B Elongation of genetically dwarf plants
C Rooting in stem cuttings
D Yellowing of young leaves

The correct answer is:
Elongation of genetically dwarf plants

Solution:
One of the important hormones as growth regulator in plants is the gibberellins. It is a type of promotory hormones. All varieties of this hormone are acidic. They produce a wide range of physiological effects in the plant. One of the effects of this hormone is the increase in the axis of the stem which is used in elongation of genetically dwarf plants.

Topic: Biology, Plant - Growth and Development, NEET
Which of the following phytohormones are used to hasten the process of maturation in conifers?

Options:
A ABA
B Auxin
C Gibberellin
D Cytokinin

The correct answer is:
Gibberellin

Solution:
Gibberellin is one of the growth hormones which promotes growth by inducing elongation in the axis of the plant. It has effects like longer leaves, long internodes, etc. Spraying juvenile conifers with GAs hastens the maturity period, thus leading to early seed production.

Topic: Biology, Plant - Growth and Development, NEET
Which of the following pigments absorbs light and prevents photo-oxidation of chlorophyll?

Options:
A Chlorophyll a
B Chlorophyll b
C Carotenoids
D Xanthophylls

The correct answer is:
Carotenoids

Solution:
Carotenoids are called accessory pigments and they are not only enable a wider range of wavelength of incoming light to be for photosynthesis but also protection i.e. carotenoids prevent photo-oxidation.

Topic: Biology, Photosynthesis in Higher Plants, NEET
Which of the following pigments is purplish-red and contains a vitamin derivative?

Options:
A Rhodopsin
B Iodopsin
C Melanin
D None of the above

The correct answer is:
Rhodopsin

Solution:
In the human eye, the rods contain a purplish-red protein called the rhodopsin or visual purple, which contains a derivative of Vitamin A.

Topic: Biology, Neural Control and Coordination, NEET
Which of the following pituitary hormones does not directly control other endocrine glands or structures?

Options:
A Thyroid-stimulating hormone (TSH)
B Luteinizing hormone (LH)
C Adrenocorticotrophic hormone (ACTH)
D Growth hormone (GH)

The correct answer is:
Growth hormone (GH)

Solution:
All the hormones of anterior pituitary gland directly control and regulate the activity of other endocrine glands/structures except growth hormone (GH). GH is the only adenohypophysis hormone which acts on body cells.

Topic: Biology, Chemical Coordination and Integration, NEET
Which of the following plant can be propagated by leaf and bulbils respectively?

Options:
A Bryophyllum, Agave
B Citrus, Ginger
C Bougainvillea, Potato
D Potato, Bryophyllum

The correct answer is:
Bryophyllum, Agave

Solution:
Vegetative reproduction - It occurs by structures known as vegetative propagules which are of the following types:
(i) Rhizome. Example: Ginger.
(ii) Eyes (or buds). Example: Potato.
(iii) Bulbils. Example: Agave.
(iv) Leaf buds. Adventitious buds arise from the notches present at margins of leaves. Example: Bryophyllum.
(v) Offset. Example : Water hyacinth.

Topic: Biology, Reproduction in Organisms, NEET
Which of the following plant cells show totipotency?

Options:
A Cork cells, meristem, spores

B Meristem, zygote, spores

C âSpores, zygote, xylem vessels

D Sieve tube, zygote, spores

The correct answer is:
Meristem, zygote, spores

Solution:
Totipotency is the natural and genetic potential of a single plant cell to form the entire plant. It is the characteristic feature of the cell to form all cell types in the adult organism. Spores, zygotes and meristematic regions are good examples of totipotent cells by showing the greatest potential of differentiation and are able to form any cell.

Topic: Biology, Anatomy of Flowering Plants, NEET
Which of the following plant cycles is exhibited by Ectocarpus and kelps?

Options:
A Diplontic
B Haplontic
C Haplo-diplontic cycle
D None of the above

The correct answer is:
Haplo-diplontic cycle

Solution:
The diploid sporophyte is represented by a dominant, independent, photosynthetic, vascular plant body. It alternates with multicellular, saprophytic/autotrophic, independent but short-lived haploid gametophyte. Such a pattern is known as haplo-diplontic life cycle. All pteridophytes exhibit this pattern. Interestingly, while most algal genera are haplontic, some of them such as Ectocarpus, Polysiphonia, kelps are haplo-diplontic.

Topic: Biology, Plant Kingdom, NEET
Which of the following plant species you would select for the production of bioethanol?

Options:
A Brassica
B Zea mays
C Pongamia
D Jatropha

The correct answer is:
Zea mays

Solution:
Biodiesel oil as well as bioethanol fuel, are two new and clean fuels for environmental protection, have already been approved as substitutes for fuel or fuel additive. Some common bottlenecks for production of biodiesel crops have been found. However, developing bioethanol crops in Taiwan has many benefits. Four most promising alcohol crops are sweet potato, maize Zea mays), sugarcane and sweet sorghum.

Topic: Biology, Microbes in Human Welfare, NEET, NEET 2009 (Screening)
Which of the following plant species you would select for the production of bioethanol?

Options:
A Zea mays
B Pongamia
C Jatropha
D Brassica

The correct answer is:
Jatropha

Solution:
Jatropha is useful for production of bioethanol. Jatropha is a genus of approximately 175 succulent plants, shrubs and trees (some are deciduous, like Jatropha curcas L.) from the family Euphorbiaceae. The hardy Jatropha is resistant to drought and pests and produces seeds containing 27-40% oil. Currently, the oil from Jatropha curcas seeds is used for making biodiesel fuel in the Philippines and in Brazil, where it grows naturally and in plantations in the southeast, and the north/northeast Brazil. Likewise, Jatropha oil is being promoted as an easily grown biofuel crop in hundreds of projects throughout India and other developing countries.

Topic: Biology, Environmental Issues, NEET
Which of the following plants are water pollinated?

Options:
A Zostera
B Vallisneria
C Hydrilla
D All of above

The correct answer is:
All of above

Solution:
Pollination by water is quite rare in flowering plants and is limited to about 30 genera, mostly monocotyledons. Some examples of water pollinated plants are Vallisneria and Hydrilla which grow in fresh water and several marine sea-grasses such as Zostera. Not all aquatic plants use water for pollination.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Which of the following plants has a zygomorphic flower?

Options:
A Mustard.
B Datura.
C Chilli.
D Gulmohur.

The correct answer is:
Gulmohur.

Solution:
Flower is said to show three types of symmetry. They are actinomorphic, zygomorphic and asymmetric. Asymmetric the word itself says that the flower cannot be divided in equal parts by any method. In actinomorphic, the flower can be divided into two equal halves radially and when it can be divided into equal halves only through one vertical plane is known as zygomorphic.

Topic: Biology, Morphology of Flowering Plants, NEET
Which of the following plants has flowers which provide insects with a safe place for laying eggs?

Options:
A Amorphophallus
B Vallisneria
C Zostera
D All of these

The correct answer is:
Amorphophallus

Solution:
In some species floral rewards are in providing safe places to lay eggs; an example is that of the tallest flower of Amorphophallus (the flower itself is about 6 feet in height).

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Which of the following plants have albuminous seeds?

(Wheat, pea, black pepper, castor, sunflower, groundnut, barley)

Options:
A Pea, black pepper, castor, sunflower
B Wheat, Sunflower, groundnut, barley
C Pea, castor, sunflower, groundnut, barley
D Wheat, castor, sunflower, barley

The correct answer is:
Wheat, castor, sunflower, barley

Solution:
Wheat, castor, sunflower, and barley are seeds whose endosperm is not completely consumed during embryo development. Such seeds are albuminous seeds. Pea and groundnut are examples of non-albuminous seeds (endosperm completely consumed). Black pepper is an example of seeds where the nucellus is persistent. The persistent nucellus is called Perisperm.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Which of the following plants is monoecious?

Options:
A Carica papaya
B Chara
C Marchantia polymorpha
D Cycas circinalis

The correct answer is:
Chara

Solution:
Plants may have both male and female reproductive structures in the same plant (bisexual) or on different plants (unisexual). Unisexual plants may be either monoecious where both male and female flowers may be present on the same individual or on separate individuals (dioecious). Some examples of monoecious plants are cucurbits and coconuts, Chara and dioecious plants are papayas and date palm.

Topic: Biology, Plant Kingdom, NEET, NEET 2021
Which of the following plants produce seeds but not flowers?

Options:
A Maize
B Mint
C Peepal
D Pinus

The correct answer is:
Pinus

Solution:
Pinus is a gymnospermic plant, i.e., it produce naked seed and do not have flowers. Maize, Mint and Peepal are angiosperms (flower bearing plants).

Topic: Biology, Plant Kingdom, NEET, NEET 2002
Which of the following plant's productivity of photosynthesis decreases due to photorespiration?

Options:
A C3 plants
B C4 plants
C CAMÂ plants
D BothÂ AÂ andÂ B

The correct answer is:
C3 plants

Solution:
Photorespiration is a wasteful process that occurs in C3, under high temperature and high light intensity when stomata close and RUBISCO functions as an oxygenase. C4 plants have kranz anatomy, due to which the RUBISCO is protected and photorespiration is absent.

Topic: Biology, Photosynthesis in Higher Plants, NEET
Which of the following plants requires light exposure less than the critical period to initiate flowering?

Options:
A The short-day plants (SDP)
B The long-day plants (LDP)
C The day-neutral plants (DNP)
D All of these

The correct answer is:
The short-day plants (SDP)

Solution:
The critical photoperiod is the light period required for floral induction, which must not be exceeded in short-day plants and should always be exceeded in long day plants in order to bring them to flower. Tobacco is a short-day plant (SDP). When the photoperiod is less than the critical period plant will flower. Wheat, Spinach and oat are all long-day plants (LDP), which flower when they receive photoperiod or light hours above the critical photoperiod.

Topic: Biology, Plant - Growth and Development, NEET