datavorous/entrance-exam-dataset huggingface dataset:
Which of the following statement is correct for NO3- ion?

Options:
A Sum of all formal charges = +1
B Formal charge on one of the oxygen atom = -2
C Formal charge on nitrogen atom = +1
D Average formal charge on oxygen atom =-13

The correct answer is:
Formal charge on nitrogen atom = +1

Solution:
Here formal charge on N-atoms is +1 and average formal charge on oxygen atom is -23

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which of the following statement is correct for node of Ranvier of nerve?

Options:
A Neurilemma is discontinuous.
B Myelin sheath is discontinuous.
C Both neurilemma and myelin sheath are discontinuous.
D Covered by myelin sheath.

The correct answer is:
Myelin sheath is discontinuous.

Solution:
Nodes of Ranvier are microscopic gaps found within myelinated axons. Their function is to speed up propagation of action potentials along the axon via saltatory conduction. Thus, the Nodes of Ranvier are the gaps between the myelin insulation of Schwann cells which insulate the axon of neuron.
Related Theory:-
The nodes of Ranvier allow for ions to diffuse in and out of the neuron, propagating the electrical signal down the axon. Since the nodes are spaced out, they allow for saltatory conduction, where the signal rapidly jumps from node to node. This rapid rate of conduction is called saltatory conduction.

Topic: Biology, Neural Control and Coordination, NEET, NEET 2002
Which of the following statement is correct for virus?

Options:
A Viruses contain either DNA or RNA
B Viruses possess their own cell membrane
C Viruses are facultative parasites
D Viruses are readily killed by antibiotics

The correct answer is:
Viruses contain either DNA or RNA

Solution:
Virus is an infectious agent having a genetic material (DNA or RNA) enclosed by an organic material that can replicate inside a host organism. Viruses are known to infect all forms of living organisms. These are obligate parasites. The genetic material is enclosed by a protein capsid and not a cell membrane. Since these lack metabolic pathways and cell wall is absent, antibiotics are ineffective against virus.

Topic: Biology, Biological Classification, NEET
Which of the following statement is correct here

Options:
A AgBr can show both Schottky and Frenkel defects
B ZnO on heating shows metal excess defects
C MnO2 is ferromagnetic substance
D Both A and B are correct

The correct answer is:
Both A and B are correct

Solution:
Here statements A and B are correct
MnO2 is an antiferromagnetic so statement C is incorrect.

Topic: Chemistry, Solid State, NEET
Which of the following statement is correct in relation to the endocrine system?

Options:
A Adenohypophysis is under direct neural regulation of the hypothalamus
B Organs in the body like gastrointestinal tract, heart, kidney and liver do not produce any hormones
C Non-nutrient chemicals produced by the body in trace amount that act as intercellular messenger are known as hormones
D Releasing and inhibitory hormones are produced by the pituitary gland

The correct answer is:
Non-nutrient chemicals produced by the body in trace amount that act as intercellular messenger are known as hormones

Solution:
Hormones are non nutrient chemicals, which act as intracellular messengers and are produced in trace amounts. Endocrine cells are present in different parts of the gastrointestinal tract, e.g., gastrin, secretin, GIP. Atrial wall of our heart secretes a peptide hormone called ANF (Atrial Natriuretic Factor), $\mathrm{RH} / \mathrm{HH}$ are produced by hypothalamus. Adenohypophysis is not directly under neural control, it is under the control of hypothalamic hormones, brought by portal system.

Topic: Biology, Chemical Coordination and Integration, NEET, NEET 2013 (All India)
Which of the following statement is correct regarding association areas in the cerebrum?

Options:
A It contains large regions which are sensory.
B It is present in cerebral cortex.
C It is responsible for simple functions of brain.
D It is present in rhombencephalon.

The correct answer is:
It is present in cerebral cortex.

Solution:
Cerebral cortex is the folds of grey matter surrounding the cerebral hemispheres. It is called grey matter due to its greyish appearance imparted due to the neuron cell bodies concentrated there. It contains motor areas and sensory areas. There are also large regions that are neither clearly sensory nor motor in function and are known as association areas. They are responsible for complex functions like intersensory, associations, memory and communication.

Topic: Biology, Neural Control and Coordination, NEET
Which of the following statement is correct regarding biodiversity?

Options:
A Medicinal plant Rauwolﬁa vomitoria growing in the Himalayan range show diversity in the synthesis of chemical colchicine in higher concentration and potential.
B Eastern Ghat have greater species diversity of amphibians than Western Ghat.
C At the ecosystem level, India, has a greater ecosystem diversity than a Scandinavian country like Norway.
D Biodiversity is the term popularised by the sociobiologist David Tilman.

The correct answer is:
At the ecosystem level, India, has a greater ecosystem diversity than a Scandinavian country like Norway.

Solution:
The medicinal plant Rauwolﬁa vomitoria growing in the Himalayan range provides chemical reserpine. Western Ghat has greater species diversity of amphibians than Eastern Ghat. Sociologist Edward Wilson popularized the term biodiversity to describe the combined diversity at all the levels of biological organization

Topic: Biology, Biodiversity and its Conservation, NEET
Which of the following statement is correct regarding foetal development in humans?

Options:
A By the end of the first month of pregnancy, the foetus develops limbs and digits.
B By the end of 12 weeks (second trimester), most of the major organ systems are formed.
C The first movements of the foetus and appearance of hair on the head is usually observed during the fifth month.
D By the end of about 26 weeks (end of the second trimester), the body is covered with fine hair, eye-lids separate, and eyelashes are formed.

The correct answer is:
The first movements of the foetus and appearance of hair on the head is usually observed during the fifth month.

Solution:
By the end of the second month of pregnancy, the foetus develops limbs and digits. By the end of 12 weeks (first trimester), most of the major organ systems are formed, for example, the limbs and external genital organs are well developed. The first movements of the foetus and appearance of hair on the head are usually observed during the fifth month. By the end of about 24 weeks (end of the second trimester), the body is covered with fine hair, eye-lids separate, and eyelashes are formed.

Topic: Biology, Human Reproduction, NEET
Which of the following statement is correct regarding gluconic acid?

Options:
A Gluconic acid is a dicarboxylic acid
B Gluconic acid is obtained by oxidation of glucose with HNO3
C Gluconic acid can form cyclic (acetal/hemiacetal) structure
D Gluconic acid is a partial oxidation product of glucose

The correct answer is:
Gluconic acid is a partial oxidation product of glucose

Solution:
Here only option D is correct and rest are incorrect as Gluconic acid is a monocarboxylic acid which is formed by the partial oxidation of glucose.
As Gluconic acid can not form cyclic (acetal/hemiacetal) structure and oxidation of glucose with HNO3 gives Saccharic acid so B and C are also incorrect.

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
Which of the following statement is correct regarding the process of replication in E.coli?

Options:
A The DNA dependent RNA polymerase catalyses polymerization in one direction, that is $5^{\prime} \rightarrow 3$ '
B The DNA dependent DNA polymerase catalyses polymerization in $5^{\prime} \rightarrow 3^{\prime}$ as well as $3^{\prime} \rightarrow 5$ ' direction
C The DNA dependent DNA polymerase catalyses polymerization in $5^{\prime} \rightarrow 3^{\prime}$ direction
D The DNA dependent DNA polymerase catalyses polymerization in one direction that is $3^{\prime} \rightarrow 5^{\prime}$

The correct answer is:
The DNA dependent DNA polymerase catalyses polymerization in $5^{\prime} \rightarrow 3^{\prime}$ direction

Solution:
Sol. In Prokaryotes, like E.coli during replication, the DNA dependent DNA polymerase cataly $\gt$ polymerization only in one direction, that is $5^{\prime} \rightarrow 3^{\prime}$

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2024
Which of the following statement is correct?

Options:
A Paramoecium and Plasmodium belong to the same kingdom as that of Penicillium
B Lichen is a composite organism formed from the symbiotic association of an algae and a protozoan
C Yeast used in making bread and beer is a fungus
D Nostoc and Anabaena are examples of protists

The correct answer is:
Yeast used in making bread and beer is a fungus

Solution:
Saccharomyces cerevisiae is a yeast used in making bread (Baker's yeast) and commercial production of ethanol.
Paramoecium and Plasmodium belong to the animal kingdom while penicillium is a fungus. Lichen is a composite organism formed from the symbiotic association of algae and a fungus. Nostoc and Anabaena are examples of kingdom Monera.

Topic: Biology, Biological Classification, NEET
Which of the following statement is correctly paired?

Options:
A Zn+2 - It is an activator of nitrogenase during nitrogen fixation.
B Mo - Activator of alcohol dehydrogenase
C Mg+2 - Activator of phosphoenol pyruvate carboxylase.
D Cu - Activator of RuBisCO

The correct answer is:
Mg+2 - Activator of phosphoenol pyruvate carboxylase.

Solution:
Mg2+ is an activator for both ribulose bisphosphate carboxylaseoxygenase and phosphoenol pyruvate carboxylase, both of which are critical enzymes in photosynthetic carbon fixation; Zn2+ is an activator of alcohol dehydrogenase and Mo of nitrogenase during nitrogen metabolism.

Topic: Biology, Mineral Nutrition, NEET
Which of the following statement is false?

Options:
A two sucrose solutions of same molality prepared in different solvents will have the same freezing point depression
B the osmotic pressure of a solution is given by the equation π=MRT , where M is the molarity of the solution
C Raoult’s law states that the vapour pressure of a component over a solution is proportional to its mole fraction
D the correct order of osmotic pressure for 0.01 M aqueous solution of each compound is BaCl2>KCl>CH3COOH>Sucrose

The correct answer is:
two sucrose solutions of same molality prepared in different solvents will have the same freezing point depression

Solution:
Two sucrose solutions of same molality prepared in different solvents will not have the same freezing point depression as for both the solvents Kf will be different so statement (A) is incorrect. Rest of the statements are correct.
π=MRT , where M is the molarity of the solution so (B) is correct
vapour pressure of a component over a solution is proportional to its mole fraction, it is Rault's law so option (C) is also correct.
Based on ( m×i ) value this order of osmotic pressure for 0.01 M aqueous solution is correct BaCl2>KCl>CH3COOH>Sucrose

Topic: Chemistry, Solutions, NEET
Which of the following statement is false?

Options:
A Cannizzaro reaction is given by aldehydes in presence of alkali
B Aldol condensation is given by aldehydes in presence of alkali
C Aldol condensation is given by aldehydes and ketones in presence of acids
D None

The correct answer is:
None

Solution:
Cannizzaro reaction is given by aldehydes having no α -hydrogen atom, aldol condensation is given by aldehydes and ketones having at least one α -atom in presence of alkali or in presence of acids.

Topic: Chemistry, Aldehydes and Ketones, NEET
Which of the following statement is false for alkali metals?

Options:
A lithium is strongest reducing agent
B all alkali metals give blue solution in liquid ammonia
C Li+ ion is exceptionally small
D lithium carbonate is stable towards heat and do not decompose

The correct answer is:
lithium carbonate is stable towards heat and do not decompose

Solution:
Li2CO3 is the only alkali metal carbonate that decomposes to produce CO2 .
Li 2 CO 3 → Li 2  +  CO 2

Topic: Chemistry, s Block Elements, NEET
Which of the following statement is false for alkali metals?

Options:
A Lithium is the strongest reducing agent
B Sodium is amphoteric in nature
C Li+ is exceptionally small
D All alkali metals give blue solution in liquid ammonia

The correct answer is:
Sodium is amphoteric in nature

Solution:
Here statement B is incorrect as aqueous solution of sodium is basic in nature.
4Na +  O 2 → 2Na 2 O → 2H 2 O 4NaOH Strong base

Topic: Chemistry, s Block Elements, NEET
Which of the following statement is false for the properties of electromagnetic waves?

Options:
A Both electric and magnetic field vectors attain the maxima and minima at the same place and same time
B The energy in electromagnetic wave is divided equally between electric and magnetic vectors
C Both electric and magnetic field vectors are parallel to each other and perpendicular to the direction of propagation of wave
D These waves do not require any material medium for propagation

The correct answer is:
Both electric and magnetic field vectors are parallel to each other and perpendicular to the direction of propagation of wave

Solution:
The time varying electric and magnetic fields are mutually perpendicular to each other and also perpendicular to the direction of propagation of the wave.

Topic: Physics, Electromagnetic Waves, NEET, NEET 2010 (Screening)
Which of the following statement is false with respect to the application of auxins?

Options:
A Control direction of growth of plants
B Inhibits lateral bud growth
C Initiate and promote cell division actively particularly in tissue culture
D Produce hyperelongation effect

The correct answer is:
Initiate and promote cell division actively particularly in tissue culture

Solution:
Cytokinin initiates and promotes cell division actively in plant tissue and cell culture. Auxins are basically used for the formation of callus (an undifferentiated mass of cells).

Topic: Biology, Plant - Growth and Development, NEET
Which of the following statement is false?

Options:
A Insulin stimulates cellular glucose uptake and utilisation and glycogenesis
B Insulin deficiency result in a disease called diabetes mellitus
C Glucagon inhibits glycogenolysis and gluconeogenesis
D Thymosin increases the production of antibodies to provide humoral immunity

The correct answer is:
Glucagon inhibits glycogenolysis and gluconeogenesis

Solution:
Glucagon stimulates glycogenolysis in the liver and inhibits glycogenesis. It also stimulates gluconeogenesis and inhibits glycolysis.

Topic: Biology, Chemical Coordination and Integration, NEET
Which of the following statement is incorrect?

Options:
A In Australian acacia, the petioles expand, become green and synthesize food.
B If more than two leaves arise at a node and form a whorl, it is called whorled, as in mustard.
C In palmately compound leaves, the leaflets are attached at a common point, i.e., at the tip of the petiole, as in silk cotton.
D Leaves of dicotyledonous plants generally possess reticulate venation, while parallel venation is the characteristic of most monocotyledons.

The correct answer is:
If more than two leaves arise at a node and form a whorl, it is called whorled, as in mustard.

Solution:
In the alternate type of phyllotaxy, a single leaf arises at each node in an alternate manner, as in china rose, mustard and sunflower plants. If more than two leaves arise at a node and form a whorl, it is called whorled, as in Alstonia.

Topic: Biology, Morphology of Flowering Plants, NEET
Which of the following statement is incorrect?

Options:
A In India about 5000 varieties of mangoes are found.
B Among vertebrates, more than half of the species belong to fishes.
C India is one of the 12 mega diversity countries of the world.
D Ecological diversity in India is more diverse than Norway.

The correct answer is:
In India about 5000 varieties of mangoes are found.

Solution:
Genetic diversity
- At the genetic level, a single species may show high diversity over its distributional range.
- Example 1: Rauwolfia vomitoria (a medicinal plant) growing in different Himalayan ranges show genetic variation in terms of potency and concentration of the active chemical (reserpine) produced by the plant.
Example 2: In India, more than 50,000 genetically different strains of rice are found.
Example 3: In India, more than 1,000 varieties of mango are found.

Topic: Biology, Biodiversity and its Conservation, NEET
Which of the following statement is incorrect?

Options:
A Electron affinity of nitrogen and noble gases is zero
B Cesium is the most electropositive element; while fluorine is the most electronegative element
C Chlorine has the highest electron affinity among all the elements of periodic table
D In any period, the atomic radius the noble gas is lowest

The correct answer is:
In any period, the atomic radius the noble gas is lowest

Solution:
Atomic radius of helium is greater than H. Similarly, atomic radius of neon is greater than that of fluorine. This is because interelectronic repulsion in fully-filled shells outweighs the effect of increased effective nuclear charge. Rest statements are correct.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
Which of the following statement is incorrect?

Options:
A The solutions of alkali metal in liquid ammonia are strongly reducing in nature
B BeCl2 is a linear molecule in vapour phase, but is polymeric in solid state
C Calcium carbide reacts with water to give acetylene
D Calcium is also an essential constituent of chlorophyll

The correct answer is:
Calcium is also an essential constituent of chlorophyll

Solution:
Here statement in option D is incorrect as Chlorophyll is complex of Mg and not of calcium.
A. Alkali metal solution in ammonia is strongly reducing, due to the presence of solvated electrons. Metal ammonia solution also liberate H2 on standing.
B. Anhydrous beryllium chloride is polymeric in solid state, but BeCl2 vapour contains BeCl2 and (BeCl2)2 . This compound exhibit three-centre bonding.

C. CaC2+2HOH→CH≡CH+Ca(OH)2

Topic: Chemistry, s Block Elements, NEET
Which of the following statement is incorrect?

Options:
A Polyethylene contains double bonds
B The monomer used to make tetlon is C2F4
C Condensation polymers are known as copolymers
D A denatured protein could have the same primary structure as the active protein

The correct answer is:
Polyethylene contains double bonds

Solution:
Here statement in option A is incorrect as Polyethylene, [-CH2-CH2-]n has only carbon-carbon single bonds.
Rest other statements are correct.

Topic: Chemistry, Polymers, NEET
Which of the following statement is incorrect?

Options:
A The spring wood is lighter in colour and exhibits low density wereas the autumn wood is darker and has higher density
B The heart wood is more durable and resistant to the attack of the microorganisms and insects as compared to the sap wood
C Complementary cells are parenchymatous
D Enucleated condition is found in phloem parenchyma

The correct answer is:
Enucleated condition is found in phloem parenchyma

Solution:
Phloem parenchyma is simple parenchyma cell that contains cytoplasm, vacuole, and nucleus. They are found in association with sieve tubes and companion cells. They have a thin cell wall and used in food storage and transport of food. Sieve elements are usually enucleated, although they are living cells, and are thus completely dependent upon the associated companion cells leading to the concept of the sieve element–companion cell complex (SE/CC)

Topic: Biology, Anatomy of Flowering Plants, NEET
Which of the following statement is incorrect?

Options:
A Cosmid contains gene coding for viral protein
B Cosmid replicates like plasmids
C Cosmid has antibiotic resistant marker gene
D Cos site has 12 bases helping to join complete genome to make it circular

The correct answer is:
Cosmid contains gene coding for viral protein

Solution:
A cosmid is a type of hybrid plasmid that contains a Lambda phage cos sequence. Cosmids' DNA sequences are originally from the lambda phage. They are often used as a cloning vector in genetic engineering.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following statement is incorrect?

Options:
A Speciation is generally a function time.
B Tropical environment unlike temperate ones are less seasonal.
C Constant environment does not promote niche specialization.
D There is more solar energy available in tropics

The correct answer is:
Constant environment does not promote niche specialization.

Solution:
Greater biological diversity in tropics is due to long evolutionary time for species diversification. Tropical environments unlike temperate ones, are less seasonal, relatively more constant and predictable. Such constant environment promote niche specialization and lead to a greater species diversity. More solar energy contributes to higher productivity, this in turns might contribute indirectly to greater diversity.

Topic: Biology, Biodiversity and its Conservation, NEET
Which of the following statement is incorrect?

Options:
A Ozone is violet-black in solid state
B Ozone is diamagnetic gasÂ
C NOCl and ONO- are isoelectronic
D Ozone molecule is bent

The correct answer is:
NOCl and ONO- are isoelectronic

Solution:
Ozone in solid state is violet-black solid.
All paired electrons, so it is diamagnetic as per Lewis structure.
NOCl=Number of electrons =32
ONO − = Number of electrons =24
They are not isoelectronic.
O 3 has bent structure with Bond angle 116.8 o .

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following statement is incorrect?

Options:
A Most of the euglenoids live in running fresh water while Dinoflagellates are mostly marine.
B Euglenoids carry same pigments as that of higher plants
C Amoeboid protozoans live in fresh water, sea water or moist soil
D Marine amoeboids have silica shells on their surface

The correct answer is:
Most of the euglenoids live in running fresh water while Dinoflagellates are mostly marine.

Solution:
Euglenoids are members of the kingdom Protista. They live in stagnant freshwater. They show mixotrophic nutrition i.e. autotrophic as well as heterotrophic nutrition. In the presence of sunlight, they are autotrophic (having photosynthetic pigments similar to higher plants) while in absence of sunlight they are heterotrophic and show predation. Dinoflagellates are mostly marine members.

Topic: Biology, Biological Classification, NEET
Which of the following statement is incorrect?

Options:
A Isolated metabolic reactions in vitro are not living things but surely living reactions.
B All organisms, from the prokaryotes to the most complex eukaryotes have self-consciousness.
C The sum total of all the chemical reactions occurring in our body is metabolism.
D Metabolic reactions can be demonstrated outside the body in cell-free system.

The correct answer is:
All organisms, from the prokaryotes to the most complex eukaryotes have self-consciousness.

Solution:
Consciousness is a defining property because it is seen in all living organisms from prokaryotes to complex eukaryotes without any exception but self-consciousness is a characteristic feature of human only because a human is the only organism which is aware of himself. All reactions taking place inside the body are collectively called metabolism which is also a defining property of living beings.

Topic: Biology, The Living World, NEET