datavorous/entrance-exam-dataset huggingface dataset:
Maximum bioconcentration of pesticide residues is usually found in birds that exclusively feed on

Options:
A Fish
B Seeds
C Worms
D Meat

The correct answer is:
Fish

Solution:
Biological magnification is the increase in concentration of persistent pollutant per unit weight of the organism with the rise in trophic level.

Topic: Biology, Environmental Issues, NEET
Maximum bond angle at nitrogen is present in which of the following?

Options:
A NO2
B NO2-
C NO2+
D NO3-

The correct answer is:
NO2+

Solution:
NO 2 =
NO 2 â =
NO 3 â =
NO2+ ion $\Rightarrow$
H=125-1=2 sp hybridisation
Linear geometry
Bond angle 180o

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET, NEET 2015 (Phase 1)
Maximum bond angle at nitrogen is present in which of the following?

Options:
A NO2
B NO2+
C NO2-
D NO3-

The correct answer is:
NO2+

Solution:
Bond angle ∝ bond order, s%
NO2+ : sp hybridisation (bond angle = 180°)

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Maximum concentration of Cd in drinking water is

Options:
A 0.5ppm
B 0.7ppm
C 0.005ppm
D 0.07ppm

The correct answer is:
0.005ppm

Solution:
Correct Option is : 3
0.005ppm

Topic: Chemistry, Environmental Chemistry, NEET
Maximum deviation from ideal gas is expected from

Options:
A $\mathrm{H}_2(g)$
B $\mathrm{N}_2(g)$
C $\mathrm{CH}_4(g)$
D $\mathrm{NH}_3(g)$

The correct answer is:
$\mathrm{NH}_3(g)$

Solution:
Easily liquifiable gases like $\mathrm{NH}_3, \mathrm{SO}_2$ etc. exhibit maximum deviation from ideal gas as for them $Z \ll \ll < $.
$\mathrm{CH}_4$ also exhibits deviation but it is less as compared to $\mathrm{NH}_3$.

Topic: Chemistry, Solutions, NEET, NEET 2013 (All India)
Maximum deviation from ideal gas is expected in

Options:
A N2(g)
B CH4(g)
C NH3(g)
D H2(g)

The correct answer is:
NH3(g)

Solution:
As for NH3 the force of attraction between NH3 molecules is maximum (Van der Waal constant 'a' is high) as it is polar so dipole-dipole interaction are maximum hence it shows maximum deviation. N2,CH4,H2 are non-polar so their deviation is less than ammonia.

Topic: Chemistry, States of Matter, NEET
Maximum entropy will be in which of the following?

Options:
A Ice
B Liquid water
C Snow
D Water vapour

The correct answer is:
Water vapour

Solution:
Ice-solid, snow-solid, liquid H2O liquid, water vapour-gas. Water vapours have highest entropy.

Topic: Chemistry, Thermodynamics (C), NEET
Maximum kinetic energy of a photoelectric varies with the frequency f of the incident radiation as

Options:
A
B
C
D

The correct answer is:

Solution:
From Einstein's photoelectric equation, we have
Kmax=hf-Ï0 .....(i)
Here, Ï0= work function of the surface
= constant
From Equation. (i), graph of Kmaxâv/s f is

Topic: Physics, Dual Nature of Matter, NEET
Maximum number of active hydrogen are present in

Options:
A ethanoic acid
B ethyne
C methanol
D glycerol

The correct answer is:
glycerol

Solution:
Hydrogen attached with oxygen, nitrogen, sulphur, triplybonded-carbon, etc. are called active hydrogen.

Substance
A
B
C
D

Number of active hydrogen
1
2
1
3

Topic: Chemistry, s Block Elements, NEET
Maximum number of electrons in a subshell of an atom is determined by the following

Options:
A $4 l+2$
B $2 l+1$
C $4 l-2$
D $2 n^2$

The correct answer is:
$4 l+2$

Solution:
Total number of subshells $=(2 l+1)$
$\therefore$ Maximum number of electrons in the subshell $=2(2 \mathrm{l}+1)=4 \mathrm{l}+2$

Topic: Chemistry, Structure of Atom, NEET, NEET 2009 (Screening)
Maximum number of existing transgenic animals is of

Options:
A mice
B $\operatorname{cow}$
C pig
D fish

The correct answer is:
mice

Solution:
Animals that have had their DNA manipulated to possess and express an extra (foreign) gene are known as transgenic animals e.g., rats, rabbits, pig, sheep, cows, fish, etc. Over $95 \%$ of all eisting transgenic animals are mice.

Topic: Biology, Biotechnology and Its Applications, NEET, NEET 2011 (Screening)
Maximum nutritional diversity is found in the group

Options:
A Fungi
B Animalia
C Monera
D Plantae

The correct answer is:
Monera

Solution:
Maximum nutritional diversity is shown by the members of kingdom-Monera. Some of them are autotrophic (e.g., photosynthetic autotrophic or chemosynthetic autotrophic) while the vast majority are heterotrophs (e.g., saprotrophic or parasitic). Ecologically, these may be producers or decomposers.

Topic: Biology, Biological Classification, NEET, NEET 2012 (Screening)
Maximum nutritional diversity is found in the kingdom

Options:
A Fungi.
B Animalia.
C Monera.
D Plantae.

The correct answer is:
Monera.

Solution:
R.H.Whittaker gave the five-kingdom classification i.e. Monera, Protista, Fungi, Plantae, and Animalia. The maximum nutritional diversity is found in the Monera group and they are the group that does not have a cell nucleus membrane. It is a prokaryote. Bacteria are placed under monera. They are present everywhere. Some bacteria help in nitrogen fixation. Example: Rhizobium. Some bacteria live in hot sulfur springs and they obtain their energy by reduction of sulfur. In this cyanobacteria are also photosynthetic. Example: Nostoc, Oscillatoria, Gloeocapsa, etc.
Fungi are heterotrophic and saprophyte.

Topic: Biology, Biological Classification, NEET
Maximum trapping of solar energy is observed in,

Options:
A Planting trees
B Cultivating crops
C Growing algae in tanks
D Growing grasses

The correct answer is:
Growing algae in tanks

Solution:
Algae are useful to man in a variety of ways. Algae are the most efficeint photosynthesizing organisms. At least a half of the total carbon dioxide fixation on earth is carried out by algae through photosynthesis. Being photosynthetic they increase the level of dissolved oxygen in their immediate environment. They are of paramount importance as primary producers of energy-rich compounds which form the basis of the food cycles of all aquatic animals.

Topic: Biology, Photosynthesis in Higher Plants, NEET
Maximum water potential is present in

Options:
A Hypotonic solution
B Hypertonic solution
C Isotonic solution
D Pure water

The correct answer is:
Pure water

Solution:
Water potential depends upon the concentration of solute. If the concentration of solute increases, water potential reduces. Thus, the maximum potential is present in pure water.

Topic: Biology, Transport in Plants, NEET
____________ may move across the membrane by the process of simple diffusion along the concentration gradient, from higher concentration to lower concentration.

Options:
A Polar molecules
B Protein
C Neutral solutes
D Non polar molecules

The correct answer is:
Neutral solutes

Solution:
Cell membrane is selectively permeable to some molecules on either side. Hydrophobic lipids does not allow movement of water and charged ions across the membrane. Many molecules can move across the membrane by the process of simple diffusion along the concentration gradient.

Topic: Biology, Cell - The Unit of Life, NEET
Measurement and the comparison of total growth per unit time is known as

Options:
A Absolute growth rate
B Relative growth rate
C Both a and b
D None of these

The correct answer is:
Absolute growth rate

Solution:
Quantitative comparisons between the growth of living system can also be made in two ways, measurement and the comparison of total growth per unit time is called the absolute growth rate and the growth of the given system per unit time expressed on a common basis, per unit initial parameters is called the relative growth rate.

Topic: Biology, Plant - Growth and Development, NEET
Measuring Biochemical Oxygen Demand (BOD) is a method used for

Options:
A estimating the amount of organic matter in sewage water
B working out the efficiency of oil driven automobile engines
C measuring the activity of Saccharomyces cerevisae in producing curd on a commercial scale
D working out the efficiency of RBCs about their capacity to carry oxygen

The correct answer is:
estimating the amount of organic matter in sewage water

Solution:
Decomposition of organic matter by microbes requires oxygen. The degree of impurity of water due to organic matter is measured in terms of BOD (Biochemical Oxygen Demand) or BOD is the oxygen in milligrams required for five days in one litre of water at $20^{\circ} \mathrm{C}$ for the microorganisms to metabolise organic waste.

Topic: Biology, Microbes in Human Welfare, NEET, NEET 2012 (Screening)
Measuring Zeta potential is useful in determining which property of colloidal solution?

Options:
A Solubility
B Stability of the colloidal particles
C Size of the colloidal particles
D Viscosity

The correct answer is:
Stability of the colloidal particles

Solution:
This potential difference between the fixed layer and diffused layer of opposite charges is called electrokinetic potential or zeta potential.

Greater the Zeta potential more will be the stability of colloidal particles.

Topic: Chemistry, Surface Chemistry, NEET, NEET 2020 (Phase 1)
Mechanical tissue consisting of living cells is

Options:
A Sclerenchyma
B Collenchyma
C Chlorenchyma
D Parenchyma

The correct answer is:
Collenchyma

Solution:
Collenchyma tissue is made up of elongated cells with irregularly thickened walls. They provide structural support in growing shoots and leaves. They are living cells.

Topic: Biology, Anatomy of Flowering Plants, NEET
Mechanism of a hypothetical reaction X2+Y2→2XY is given below:
(i) X2→X+X fast
(ii) X+Y2⇌XY+Y slow
(iii) X+Y→XY fast
The overall order of the reaction will be

Options:
A 1
B 2
C 0
D 1.5

The correct answer is:
1.5

Solution:
The solution of this question is given by assuming step (i) to be reversible which is not given in question
Overall rate = Rate of slowest step (ii)
=kX Y2 ......(i)
K=rate constant of step (ii)
Assuming step (i) to be reversible, its equilibrium constant,
keq=X2X2 ⇒ X=keq12 X212 .....(ii)
Put (ii) in (i)
Rate =kkeq12 X212 Y2
Overall order =12+1=32

Topic: Chemistry, Chemical Kinetics, NEET, NEET 2017
Mechanism of blood clotting is given below:

An injury or a trauma stimulates the platelets in the blood to release certain factors which activate the mechanism of coagulation. An enzyme complex, ______P_______ is formed by a series of linked enzymic reactions (______Q_______process) involving a number of factors present in the plasma in an inactive state. This enzyme complex is required for formation of______R_______. _____S_______ ions play a very important role in clotting.

Identify the correct option that represents P, Q, R, and S.

Options:
A

P	Q	R	S

thrombokinase	inhibitory	prothrombin	magnesium

B

P	Q	R	S

prothrombin	cascade	thrombin	magnesium

C

P	Q	R	S

thrombin	cascade	thrombokinase	calcium

D

P	Q	R	S

thrombokinase	cascade	thrombin	calcium

The correct answer is:

P	Q	R	S

thrombokinase	cascade	thrombin	calcium

Solution:
Mechanism of blood coagulation or clotting

A. Injury or trauma results in:
I. Stimulation of platelets → Release of certain factors that activate the mechanism of coagulation.
II. Damaged tissues → Release of certain factors that can also initiate coagulation.
B. A series of linked enzymic reactions (cascade process) that involves a number of clotting factors present in the plasma in an inactive state is initiated that finally results in the formation of an enzyme complex - Thrombokinase.
C. Prothrombin ---------- Thrombokinase-------- → Thrombin
D. Fibrinogens in the plasma ---------- Thrombin-------- → Fibrins
- Calcium ions are very important for clotting.

Topic: Biology, Body Fluids and Circulation, NEET
Medical Termination of Pregnancy (MTP) is considered safe up to have many weeks of pregnancy?

Options:
A Twelve weeks
B Eighteen weeks
C Six weeks
D Eight weeks

The correct answer is:
Twelve weeks

Solution:
Intentional or voluntary termination of pregnancy before full term is called medical termination of pregnancy (MTP) or induced abortion. MTPs are considered relatively safe during the first trimester, ie, upto 12 weeks of pregnancy. Second trimester abortions are much more riskier.

Topic: Biology, Reproductive Health, NEET, NEET 2011 (Screening)
Megasporangium is equivalent to

Options:
A embryo sac
B fruit
C nucellus
D ovule

The correct answer is:
ovule

Solution:
An ovule (megasporangium) generally has a single embryo sac formed from a megaspore through reduction division. It is a small structure attached to the placenta by means of a stalk called funicle.
Ovule $\rightarrow$ Megaspore Mother Cell (MMC) by meiosis $\rightarrow$ Megaspore
Each has one or two protective ervelopes called integuments. Nucellus is a mass of cells enclosed with the integuments. Fruits develop from the ovary of flower, ather floral parts degenerate and fall off.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET, NEET 2013 (All India)
Meiosis in diploid organisms results in

Options:
A Production of gametes
B Reduction in the number of chromosomes
C Introduction of variation
D All of the above

The correct answer is:
All of the above

Solution:
Meiosis in diploid organisms results in production of gametes, reduction in the number of chromosomes and introduction of variation.

Topic: Biology, Cell Cycle and Cell Division, NEET
Meiosis is one of the two cell division process observed to occur in cells. Which statement from below correctly describes the outcome of a successful meiotic division?

Options:
A Four daughter cells are produced. Each resulting daughter cell has the same number of chromosomes as the parent cell.
B Two daughter cells are produced Each resulting daughter cell has the same number of chromosomes as the parent cell.
C Four daughter cells are produced. Each resulting daughter cell has one-half the number of chromosomes as the parent cell.
D Two daughter cells are produced. Each resulting daughter cell has one-half the number of chromosomes as the parent cell.

The correct answer is:
Four daughter cells are produced. Each resulting daughter cell has one-half the number of chromosomes as the parent cell.

Solution:
Meiotic division is a type of cell division where two cell division occurs with only one round of DNA duplication process. The eventual new cells that are formed have half the genetic content of the participating cells. If a participating cell has 20 chromosome, its eventual daughter cell will have 10 chromosome. Thus, the statement of each daughter cell having one-half the number of chromosomes as the parent cell is the correct one.
Mitosis is another type of cell division process where the DNA duplication occurs once and the cell also divides one time. The resulting daughter cells formed have the same amount of genetic content as the parent cell.

Topic: Biology, Cell Cycle and Cell Division, NEET
Meiosis occurs in organisms during

Options:
A Sexual reproduction
B Vegetative reproduction
C Both sexual and vegetative reproduction
D None of these

The correct answer is:
Sexual reproduction

Solution:
Meiosis occurs in organisms during sexual reproduction. The production of offspring by sexual reproduction includes the fusion of two gametes, each with a complete haploid set of chromosomes. Gametes are produced through meiosis.

Topic: Biology, Cell Cycle and Cell Division, NEET
Meiosis takes place in

Options:
A Mleiocyte
B Conidia
C Gemmule
D Megaspore

The correct answer is:
Mleiocyte

Solution:
In diploid organisms, specialised cells called meiocytes (gamete mother cell) undergo meiosis. Conidia and gemmules are asexual reproductive structures found in Peniciffum and sponge respectively. Megaspores are female gametes in plants, which undergo sexual reproduction.

Topic: Biology, Plant Kingdom, NEET, NEET 2013 (All India)
Meiosis takes place in

Options:
A gemmules
B megaspore
C meiocytes
D conidia

The correct answer is:
meiocytes

Solution:
Meiocytes are the diploid cells that will undergo the process of meiosis. Gemmules and conidia are the asexual reproductive structures found in sponges and fungi. Megaspores are formed due to megasporogenesis and are haploid structures.

Topic: Biology, Reproduction in Organisms, NEET
Meiosis-I is also called as heterotypic division/reductional cell division. Select the correct option by comparing the phase of the meiosis and their respective events from lists I and II.

List I
(Phase of meiosis)	List II
(Event that occurs)

1. Prophase I	Crossing over occurs

2. Metaphase I	Sister chromatids migrate to opposite poles

3. Anaphase I	Homologous chromosomes line up at equator in pairs

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

The correct answer is:
1 is correct, 2 and 3 are false

Solution:
Crossing over is the exchange of genetic material between homologous chromosomes which occurs during prophase I of meiosis during a process called a synopsis. During metaphase, the homologous chromosomes line up at the equator in pairs and in anaphase, the sister chromatids migrate towards opposite poles.

Topic: Biology, Cell Cycle and Cell Division, NEET
Melanin protects from:

Options:
A UV rays
B visible rays
C infra red rays
D X-rays

The correct answer is:
UV rays

Solution:
Melanin protects skin from the sun's ultraviolet rays. These can burn the skin and reduce its elasticity, leading to premature aging. People tan because sunlight causes the skin to produce more melanin and darken.
Related Theory:-
The basal cell layer contains cells called melanocytes. Melanocytes produce the skin pigment known as melanin, which gives skin its tan or brown colour.

Topic: Biology, Chemical Coordination and Integration, NEET, NEET 2002
Melatonin is produced by

Options:
A Thymus
B Skin
C Pituitary
D Pineal gland

The correct answer is:
Pineal gland

Solution:
Melatonin is secreted by pineal gland present between the cerebral hemispheres. Melatonin concentration in blood follows a diurnal cycle, it rises in the evening and drops at noon. Melatonin lightens and regulates working of gonads.

Topic: Biology, Chemical Coordination and Integration, NEET
Melting point shows uneven trend in alkanes with increase in molecular mass. Why?

Options:
A Packing fraction
B Symmetrical parameters
C Hydrogen bonding
D Both A and B

The correct answer is:
Both A and B

Solution:
Correct Option is : 4
Both A and B

Topic: Chemistry, Hydrocarbons, NEET
Members of Phycomycetes are found in i. Aquatic habitats ii. On decaying wood iii. Moist and damp places iv. As obligate parasites on plants Choose from the following options

Options:
A None of the above
B I and iv
C ii and iii
D All of the above

The correct answer is:
All of the above

Solution:
Members of Phycomycetes are found in Aquatic habitats, On decaying wood, Moist and damp places and occur as obligate parasites on plants.

Topic: Biology, Biological Classification, NEET
Members of the same species

Options:
A produce fertile offsprings in natural condition
B are reproductively isolated
C differ a lot with each other
D are genetically similar

The correct answer is:
produce fertile offsprings in natural condition

Solution:
Species is the smallest unit of taxonomic hierarchy, which consists of group of similar organism capable of interbreeding freely in nature to form fertile offsprings, it brings about variation necessary for evolution.

Topic: Biology, The Living World, NEET
Members of which of the following classes of fungi are mostly Decomposer of litter and help in Mineral cycling?

Options:
A Ascomycetes
B Phycomycetes
C Deuteromycetes
D Basidiomycetes

The correct answer is:
Deuteromycetes

Solution:
Some members of deuteromycetes are saprophytes or parasites while a large number of them are decomposers of litter and help in mineral cycling.

Topic: Biology, Biological Classification, NEET
Members of which of the following groups are known to be exclusively marine?

Options:
A Aquatic vertebrates
B Tetrapoda
C Pisces
D Protochordata

The correct answer is:
Protochordata

Solution:
Protochordates are primitive chordates. All protochordates are exclusively marine.

Topic: Biology, Animal Kingdom, NEET
Members of which phylum lack a well-defined circulatory system and respiratory system?

Options:
A Aschelminthes
B Annelida
C Arthropoda
D Hemichordata

The correct answer is:
Aschelminthes

Solution:
The circulatory system was seen for the first time in phylum Annelida and shows a closed type of circulatory system, while Arthropoda and hemichordate shows an open type of circulatory system. In phylum Aschelminthes (Nemathelminthes) the circulatory system and respiratory system are absent.

Topic: Biology, Animal Kingdom, NEET
Membrane- bound cell organelles are absent in

Options:
A Plasmodium
B Saccharomyces
C Streptococcus
D Chlamydomonas

The correct answer is:
Streptococcus

Solution:
Streptococcus is a genus of bacteria that have cocci shaped cells. Bacteria are known to be of prokaryotic cell type, which is characterized by lack of membrane-bound organelles and nucleus.

Topic: Biology, Cell - The Unit of Life, NEET
Membrane-bound organelles are absent in

Options:
A Saccharomyces
B Streptocaccus
C Chlamydomonas
D Plasmodium

The correct answer is:
Streptocaccus

Solution:
Streptacaccus is a spherical, Gram-positive bacterium. Membrane bound organelles are absent in prokaryotes.
Fungi (eg, Saccharomyces) represents a group of eukaryotic, non-photosynthetic, heterotrophic organisms. Algae (eg, Chlamydomonas) is a group of chlorophyll bearing, autotrophic, thalloid plants.
Plasmodium is a genus of protists. Infection by these organisms is known as malaria.

Topic: Biology, Biological Classification, NEET, NEET 2010 (Screening)
Membrane-bound organelles are absent in:

Options:
A Saccharomyces
B Streptococcus
C Chlamydomonas
D Plasmodium

The correct answer is:
Streptococcus

Solution:
Membrane bound organelles are absent in Streptococcus. Streptococcus is a bacterium that is included under kingdom Monera. Monerans are prokaryotes which lack membrane bound organelles like mitochondria, E.R, Golgi etc.
Saccharomyces, Chlamydomonas and Plasmodium are eukaryotes that have membrane bound organelles.

Topic: Biology, Biological Classification, NEET
Mendel conducted artificial pollination/cross-pollination experiments using several

Options:
A true-breeding garden pea lines
B true-breeding sweet pea plant
C hybrid garden pea lines
D hybrid sweet pea lines

The correct answer is:
true-breeding garden pea lines

Solution:
True breeding lines are homozygous organisms. For any hybridization experiment parents used should be homozygous for the gene considered.

Topic: Biology, Principles of Inheritance and Variation, NEET
Mendel did not get linkage phenomena due to

Options:
A Dominance
B Independent assortment
C Segregation
D Genes on same chromosome

The correct answer is:
Independent assortment

Solution:
The principle of independent assortment states that members of one pair of factors assorted independently of members of other gene pairs. If genes show independent assortment they can not exhibit linkage.
Linkage Î±1Independent assortment

Topic: Biology, Principles of Inheritance and Variation, NEET
Mendel did not recognise the linkage phenomenon in his experiments because

Options:
A he did not have a powerful microscope.
B he studied only pure plants.
C there were many chromosomes to handle.
D the studied characters were located on different chromosomes.

The correct answer is:
the studied characters were located on different chromosomes.

Solution:
Mendel did not recognise the linkage phenomenon in his experiments because characters he studied were located on different chromosomes. He studied seven pairs of characters which were present on four different pairs of chromosomes.

Topic: Biology, Principles of Inheritance and Variation, NEET