datavorous/entrance-exam-dataset huggingface dataset:
Which of the following statements is incorrect?

Options:
A Cockroaches exhibit mosaic vision with less sensitivity and more resolution
B A mushroom-shaped gland is present in the 6-7th abdominal segments of male cockroach
C A pair of spermatheca is present in the 6th segment of female cockroach
D Female cockroach possesses sixteen ovarioles in the ovaries

The correct answer is:
Cockroaches exhibit mosaic vision with less sensitivity and more resolution

Solution:
Statement (a) is incorrect because cockroach vision is very sensitive but provides less resolution. Such vision is called mosaic vision. It has compound eye and each eye contains about 2000 ommatidia.

Topic: Biology, Structural Organisation in Animals, NEET, NEET 2019 (Odisha)
Which of the following statements is incorrect?

Options:
A RuBisCO is a bifunctional enzyme
B In C4 plants, the site of RuBisCO activity is mesophyll cell
C The substrate molecule for RuBisCO activity is a 5-carbon compound
D RuBisCO action requires ATP and NADPH

The correct answer is:
In C4 plants, the site of RuBisCO activity is mesophyll cell

Solution:
In C4 plants, the fixation of carbon dioxide takes place in mesophyll cells with the help of enzyme PEPcase. The synthesis of sugar takes place in bundle-sheath cells with the help of RuBisCO enzymes.

Topic: Biology, Photosynthesis in Higher Plants, NEET, NEET 2020 (Phase 2)
Which of the following statements is incorrect?

Options:
A Biomass decreases from first to fourth trophic level
B Energy content gradually increases from first to fourth trophic level
C Number of individuals decreases from first trophic level to fourth trophic level
D Energy content gradually decreases from first to fourth trophic level

The correct answer is:
Energy content gradually increases from first to fourth trophic level

Solution:
The pyramid of energy is always upright because the flow of energy is unidirectional from producer to consumer level. The energy content is maximum in producers. The energy decreases at each trophic level of food chain, as part of the energy is lost as heat and major part of energy is liberated during respiration for use in various activities.

Biomass decreases from first to fourth trophic level in an upright pyramid.

Number of individuals decreases from first trophic level to fourth trophic level in an upright pyramid.

Topic: Biology, Ecosystem, NEET, NEET 2020 (Phase 2)
Which of the following statements is incorrect?

Options:
A Both ATP and NADPH+H+ are synthesized during non-cyclic photophosphorylation.
B Stroma lamellae have PS I only and lack NADP reductase.
C Grana lamellae have both PS I and PS II.
D Cyclic photophosphorylation involves both PS I and PS II.

The correct answer is:
Cyclic photophosphorylation involves both PS I and PS II.

Solution:
Cyclic photophosphorylation also occurs when only light of wavelengths beyond 680 nm are available for excitation. When only PS I is functional, the electron is circulated within the photosystem I, and the phosphorylation occur due to the cyclic flow of electrons. A possible location where this could be happening is in the stroma lamellae. While the membrane or lamellae of the grana have both PS I and PS II the stroma lamellae membranes lack PS II as well as NADP reductase enzyme. The excited electron does not pass on to NADP+ but is cycled back to the PS I complex through the electron transport chain. The cyclic flow, hence, results only in the synthesis of ATP, but not of NADPH+H+.

Topic: Biology, Photosynthesis in Higher Plants, NEET, NEET 2021
Which of the following statements is incorrect?

Options:
A During aerobic respiration, the role of oxygen is limited to the terminal stage.
B In ETC (Electron Transport Chain), one molecule of NADH +H+ gives rise to 2 ATP molecules, and one FADH2 gives rise to 3 ATP molecules.
C ATP is synthesized through complex V.
D Oxidation-reduction reactions produce proton gradients in respiration.

The correct answer is:
In ETC (Electron Transport Chain), one molecule of NADH +H+ gives rise to 2 ATP molecules, and one FADH2 gives rise to 3 ATP molecules.

Solution:
Aerobic respiration is the process that leads to the complete oxidation of organic substances in the presence of oxygen and releases CO2, water, and a large amount of energy present in the substrate. The crucial events in aerobic respiration are:

The complete oxidation of pyruvate by the stepwise removal of all the hydrogen atoms, leaving three molecules of CO2

The passing on of the electrons removed as part of the hydrogen atoms to molecular O2 with the simultaneous synthesis of ATP.

When the electrons pass from one carrier to another via complex I to IV in the electron transport chain, they are coupled to ATP synthase (complex V) to produce ATP from ADP and inorganic phosphate. The number of ATP molecules synthesised depends on the nature of the electron donor. Oxidation of one molecule of NADH gives rise to 3 molecules of ATP, while that of one molecule of FADH2 produces 2 molecules of ATP. Although the aerobic process of respiration takes place only in the presence of oxygen, the role of oxygen is limited to the terminal stage of the process.

Topic: Biology, Respiration in Plants, NEET, NEET 2021
Which of the following statements is incorrect?

Options:
A Most commonly used bio-reactors are of stirring type
B Bio-reactors are used to produce small scale bacterial cultures
C Bio-reactors have an agitator system, an oxygen delivery system and foam control system
D A bio-reactor provides optimal growth conditions for achieving the desired product

The correct answer is:
Bio-reactors are used to produce small scale bacterial cultures

Solution:
Correct answer is option (2)
The statement (2) is incorrect because bioreactors are used for processing of large volumes ( 100 1000 litres) of culture.
Small volume cultures cannot yield appreciable quantities of products. To produce in large quantities the development of bioreactors is required.

Topic: Biology, Biotechnology - Principles and Processes, NEET, NEET 2024
Which of the following statements is incorrect about gymnosperms?

Options:
A They are heterosporous
B Male and female gametophytes are free living
C Most of them have narrow leaves with thick cuticle
D Their seeds are not covered

The correct answer is:
Male and female gametophytes are free living

Solution:
The gametophyte generation is multicellular, haploid (n) very small in size, does not have conducting tissues and is dependent upon the sporophyte. The sporophytes of all gymnosperms are heterosporous since they produce two types of spores, namely the microspores and megaspores. The microspores are produced in structures, called microsporangia which are produced by modified fertile leaves called microsporophylls. The microsporophylls are compactly arranged in male cones or male strobili. In a microsporangium there are special diploid cells called microspores mother cells which undergo meiosis or reduction division to produce haploid microspores. Within the microspore, a reduced few celled male gametophyte generation develops. This entire structure is in the pollen grain which develops within the microsporangia. The megaspores are produced in megasporangia or ovules which are produced by modified fertile leaves called megasporophylls.

Topic: Biology, Plant Kingdom, NEET, NEET 2020 (Phase 2)
Which of the following statements is incorrect about human eye?

Options:
A The diameter of the pupil is regulated by the muscle fibres of iris under autonomic nervous system.
B The retina of human eyes has two types of cones which possess their own characteristic photopigments.
C The Fovea is a thinned-out portion of the retina where only cones are densely packed.
D Light induces dissociation of the retinal from opsin resulting in changes in the structure of the opsin.

The correct answer is:
The retina of human eyes has two types of cones which possess their own characteristic photopigments.

Solution:
In the retina of human eyes, there are three types of cones (S-cones, M-cones and L-cones) that possess their own characteristic photopigments that correspond to red light (erythropsin), blue light (cyanopsin) and green light (chloropsin), which are primary colours.

Topic: Biology, Neural Control and Coordination, NEET
Which of the following statements is INCORRECT about Nirodh?

Options:
A Protect the user from contracting AIDS
B They are used for conception
C They are used just before coitus so that ejaculated semen would not enter female reproductive tract.
D They are made of thin rubber sheath.

The correct answer is:
They are used for conception

Solution:
Nirodh is the most popular brand of condom which is available in the market. It is a barrier method of contraception. They are usually made up of thin rubber sheath or latex. They are used to cover the tip of the penis, just before the coitus. This prevents the ejaculated semen from entering the female reproductive tract. Apart from acting as a contraceptive, condoms also act as a protection against STDs like AIDS.
Conception is the process of formation of a zygote by the union of sperm and ovum. Condoms like Nirodh prevent conception.

Topic: Biology, Reproductive Health, NEET
Which of the following statements is incorrect for a homologous series?

Options:
A All members have a general formula
B All members have the same functional group
C All members have the similiar chemical properties
D All members have the same physical properties

The correct answer is:
All members have the same physical properties

Solution:
A homologous series of compounds are those compounds which have the same general formula and functional group and the successive compounds differ by a CH2 group. As they have the same functional group, they have identical chemical properties, but due to difference in their masses, a slight gradation in the physical properties is observed. Hence, the physical properties of all memebers are not same.

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following statements is incorrect for the reason of opting scientific names over vernacular names?

Options:
A Vernacular names cannot be used in communications.
B Some vernacular names have incorrect meaning.
C Some vernacular names are particularly used for specific organisms only.
D All organisms do not occur in an area.

The correct answer is:
Some vernacular names are particularly used for specific organisms only.

Solution:
Vernacular or common names are the names given to the organisms in a particular language and region of the world. Sometimes a single organism is known by several names in the same language, e.g. Water lily has 81 Dutch names. A single name is often used for two or more species. e.g., Touch-me-not is the name for both Impatiens balsamifera (Balsam) and Mimosa pudica.

Topic: Biology, The Living World, NEET
Which of the following statements is incorrect?

I. Each Malpighian tubule in cockroach is lined by glandular and ciliated cells.
II. Most of the species of cockroach are of no economical importance.
III. Fat bodies in cockroach play an important role in reproduction.
IV. The cockroach is ammonotelic in the rainy season.

Options:
A I, III
B I, III, IV
C III, IV
D II, IV

The correct answer is:
III, IV

Solution:
In a cockroach, excretion is performed by Malpighian tubules. Each tubule is lined by glandular and ciliated cells. They absorb nitrogenous waste products and convert them into uric acid which is excreted out through the hindgut. Therefore, this insect is called uricotelic. In addition, fat bodies, nephrocytes and urecose glands also help in excretion.

Topic: Biology, Structural Organisation in Animals, NEET
Which of the following statements is INCORRECT?

I. The cell wall of plants is made up of homopolysaccharides while the cell wall of fungi is made up of heteropolysaccharides.

II. The function of an enzyme will stop if its tertiary structure is destroyed.

III. The cytoplasm contains r-thymidylic acid and d-uridylic acid as building blocks of nucleic acids.

IV. Arachidonic acid has 20 carbon atoms including the carboxyl carbon.

Options:
A I and II
B III and IV
C I and III
D II and IV

The correct answer is:
I and III

Solution:
The cell wall of plants is made up of cellulose (β-d-glucopyranose subunits linked by the (1→4) bond), while that of fungi is made up of chitin (homopolymer of N-acetyl glucosamine with β-(1,4) linkages). The tertiary structure of protein shows a crevice that acts as an enzyme. Hence the function of the enzyme will stop if this structure is destroyed. The cytoplasm contains RNA (r-uridylic acid) and DNA (d-thymidylic acid) is predominantly present in the nucleus. Arachidonic acid has 20 carbon atoms.

Topic: Chemistry, Biomolecules, NEET
Which of the following statements is incorrect regarding mitochondria?

Options:
A The matrix possesses a single double-stranded circular DNA molecule.
B It is the site of anaerobic respiration.
C The outer membrane is continuous and smooth.
D Mitochondria multiply by a fission-like division.

The correct answer is:
It is the site of anaerobic respiration.

Solution:
Mitochondria is the site for aerobic respiration. It is surrounded by two membranes, the outer membrane which is smooth, and the inner membrane which is folded into finger-like projections called cristae. Mitochondria divide by fission to increases its number.

Topic: Biology, Cell - The Unit of Life, NEET
Which of the following statements is incorrect regarding organisms of phylum Chordata?

Options:
A The organisms are characterized by the presence of a notochord and a ventral hollow nerve cord.
B They are triploblastic and bilaterally symmetrical.
C They have a ventral heart.
D They are further divided into three subphyla.

The correct answer is:
The organisms are characterized by the presence of a notochord and a ventral hollow nerve cord.

Solution:
The organisms of Phylum Chordata are not characterized by notochord only. They are characterized by the presence of:
1. A notochord
2. A dorsal hollow nerve cord
3. Paired pharyngeal gill slits

Topic: Biology, Animal Kingdom, NEET
Which of the following statements is incorrect regarding the respiratory system?

Options:
A Each terminal bronchiole gives rise to a network of bronchi.
B The alveoli are highly vascularised.
C The lungs are covered by a double-layered membrane.
D The pleural fluid reduces friction on the lung surface.

The correct answer is:
The pleural fluid reduces friction on the lung surface.

Solution:
The pleural fluid reduces friction between the two layers of the lungs.

Topic: Biology, Breathing and Exchange of Gases, NEET
Which of the following statements is incorrect ?

Options:
A Different resonating structures contribute to the resonance hybrid in proportion of their energies.
B Equivalent resonating structures result in higher resonance energy.
C Resonating structures represent hypothetical molecules having no real existance.
D Resonating structures are less stable than the resonance hybrid.

The correct answer is:
Different resonating structures contribute to the resonance hybrid in proportion of their energies.

Solution:
The more stable resonating structure (lower energy structure) has a greater contribution towards the resonance hybrid.

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following statements is not applicable to viruses?

Options:
A The virus replicates in a bacterial host.
B The protein coat of a virus does not enter the host cell.
C The genetic material is DNA or RNA.
D The virus replicates autonomously in the absence of a host.

The correct answer is:
The virus replicates autonomously in the absence of a host.

Solution:
The virus is an obligate intracellular parasite and they cannot survive outside the living host cell. They are connecting link between the living and non-living. They lacks cellular organization thus can replicate only inside other living host cell.

Topic: Biology, Biological Classification, NEET
Which of the following statements is not correct?

Options:
A Cu liberates H2 atom acids
B In its higher oxidation states, Mn forms stable compounds with oxygen and fluorine
C Mn3+ and Co3+ are oxidising agents in aqueous solution
D Ti2+ and Cr2+ are reducing agents in aqueous solution

The correct answer is:
Cu liberates H2 atom acids

Solution:
As Cu is below hydrogen in reactivity series and hence cannot displace H from acids while rest other statements are correct here.

Topic: Chemistry, d and f Block Elements, NEET
Which of the following statements is not correct?

Options:
A Only α -amino acids are obtained on hydrolysis of proteins
B The amino acids which are synthesised in the body are known as non-essential amino acids
C There are 20 essential amino acids
D L-amino acids are represented by writing the -NH2 group on the left side

The correct answer is:
There are 20 essential amino acids

Solution:
As there are 10 essential and 10 non-essential amino acids so option C is incorrect. Rest other options are correct here.

Topic: Chemistry, Biomolecules, NEET
Which of the following statements is not correct?

Options:
A The first ionization energies in (kJ mol-1 ) of carbon, silicon, germanium, tin and lead are 1086, 786, 761, 708 and 715 respectively
B Down the group, ionization energy decreases regularly from B to T1 in boron family
C Among oxides of the elements of carbon family, CO is neutral, GeO is acidic and SnO is amphoteric
D The 4f and 5f-inner transition elements are placed separately at the bottom of the periodic table

The correct answer is:
Down the group, ionization energy decreases regularly from B to T1 in boron family

Solution:
In boron family ionization energy decreases abnormally down the group and the order is as follows
B > Tl > Ga > Al > In

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
Which of the following statements is not correct?

Options:
A The fraction of the total volume occupied by the atoms in a primitive cell is 0.48
B Molecular solids are generally volatile
C The number of carbon atoms in an unit cell of diamond is 4
D The number of Bravais lattices in which a crystal can be categorized is 14

The correct answer is:
The fraction of the total volume occupied by the atoms in a primitive cell is 0.48

Solution:
Key Idea: Packing fraction of lattice structure or fraction of total volume occupied
$=\frac{\text { Volume occupied by atoms in a unit cell }}{\text { Volume of the unit cell }}$
Packing fraction of simple cube
$\begin{gathered}
=\frac{1 \times \frac{4}{3} \pi r^3}{a^3}=\frac{1 \times \frac{4}{3} \pi r^3}{(2 r)^3} \\
=0.52
\end{gathered}$
($\because$ For primitive cell $a=2 r$)
$\therefore$ Volume occupied $=52 \%$

Topic: Chemistry, Solid State, NEET, NEET 2008 (Screening)
Which of the following statements is not correct?

Options:
A Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.
B Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers.
C Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.
D Some reptiles have also been reported as pollinators in some plant species.

The correct answer is:
Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.

Solution:
More than one pollen tube of the same species can grow into the style. It is frequently found in nature.

Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers.

Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.

Some reptiles have also been reported as pollinators in some plant species.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET, NEET 2016 (Phase 1)
Which of the following statements is not correct?

Options:
A Lysosomes have numerous hydrolytic enzymes.
B The hydrolytic enzymes of lysosomes are active under acidic pH.
C Lysosomes are membrane bound structures
D Lysosomes are found by the process of packaging in the endoplasmic reticulum.

The correct answer is:
Lysosomes are found by the process of packaging in the endoplasmic reticulum.

Solution:
Lysosomes are membrane-bounded cell organelles. they have numerous hydrolytic enzymes, The hydrolytic enzymes are active in acidic pH. They are formed by the process of packaging in the Golgi complex.

Topic: Biology, Cell - The Unit of Life, NEET, NEET 2019 (All India)
Which of the following statements is not correct?

Options:
A An action potential in an axon does not move backward because the segment behind is in a refractory phase
B Depolarisation of hair cells of cochlea results in the opening of the mechanically gated potassium-ion channels
C Rods are very sensitive and contribute to daylight vision
D In the knee-jerk reflex, stimulus is the stretching of muscle and response is its contraction

The correct answer is:
Rods are very sensitive and contribute to daylight vision

Solution:
Option (c) is not correct because rods and cones are photoreceptor cells in our eyes. The rod cells contain a purple pigment rhodopsin that is useful in night vision or scotopic vision. Daylight (photopic) vision and colour vision are the functions of cones.

Topic: Biology, Neural Control and Coordination, NEET, NEET 2019 (Odisha)
Which of the following statements is not correct?

Options:
A The proinsulin has an extra peptide called C-peptide.
B The functional insulin has A and B chains linked together by hydrogen bonds.
C Genetically engineered insulin is produced in E.Coli.
D In man insulin is synthesised as a proinsulin

The correct answer is:
The functional insulin has A and B chains linked together by hydrogen bonds.

Solution:
Insulin is a relatively small protein, comprising two polypeptides, one of 21 amino acids (the A chain) and the other of 30 amino acids (the B chain) that are linked together by disulphide bonds/bridges formed between cysteine amino acids.

Topic: Biology, Biotechnology and Its Applications, NEET, NEET 2020 (Phase 1)
Which of the following statements is not correct?

Options:
A Pyramid of biomass in sea is generally inverted.
B Pyramid of biomass in sea is generally upright.
C Pyramid of energy is always upright.
D Pyramid of numbers in a grassland ecosystem is upright.

The correct answer is:
Pyramid of biomass in sea is generally upright.

Solution:
The pyramid of biomass and number may be upright or inverted. However, the pyramid of energy can never be inverted. The energy pyramid is always upright. The pyramid of biomass in the sea is generally inverted. This Inverted pyramid of biomass is due to the presence of a small standing crop of phytoplankton supporting a large standing crop of zooplankton.

Topic: Biology, Ecosystem, NEET, NEET 2021
Which of the following statements is not correct about hexagonal close packing?

Options:
A In hcp, atoms occupy 74% the available space
B It is AB AB type packing in which third layer is aligned with the first layer
C Be, Mg, Mo etc. are found to have hcp structure
D The coordination number is 6

The correct answer is:
The coordination number is 6

Solution:
In hexagonal close packing coordination number is 12 not 6 hence statement D is incorrect. Rest are correct here.

Topic: Chemistry, Solid State, NEET
Which of the following statements is not correct about noble gases?

Options:
A Their ionisation energies are very high
B Their electron affinities are nearly zero
C They do not form any chemical compounds
D They are not easily liquefied

The correct answer is:
They do not form any chemical compounds

Solution:
Noble gas like Xe can form compounds with F, & O . The first noble gas compound formed by Neil Bartlett (1962) is Xe+[PtF6]- .

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET