datavorous/entrance-exam-dataset huggingface dataset:
What is the role of nitric acid in the pickling of stainless steel?

Options:
A Neutralization of acids
B Oxidation of metals
C Removal of impurities
D Removal of scale and corrosion products

The correct answer is:
Removal of scale and corrosion products

Solution:
The paragraph does not provide specific details on the role of nitric acid in the pickling of stainless steel, so this question cannot be answered based on the provided paragraph.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
What is the role of nitrifying bacteria in the nitrogen cycle?

Options:
A They convert nitrogen to nitrogen oxides
B They reduce nitrate to nitrogen
C They oxidize ammonia to nitrite and nitrate
D They convert organic nitrogen to ammonia

The correct answer is:
They oxidize ammonia to nitrite and nitrate

Solution:
Nitrifying bacteria, Nitrosomonas and Nitrobacter, play a crucial role in the nitrogen cycle by oxidizing ammonia to nitrite and nitrate.

Topic: Biology, Mineral Nutrition, NEET
What is the role of nitrogenase in the nodule formation process?

Options:
A It multiplies and colonizes the surroundings of roots.
B It attaches to epidermal and root hair cells.
C It catalyzes the conversion of atmospheric nitrogen to ammonia.
D It initiates the nodule formation in the cortex of the root.

The correct answer is:
It catalyzes the conversion of atmospheric nitrogen to ammonia.

Solution:
Nitrogenase is a Mo-Fe protein present in the nodule and it catalyzes the conversion of atmospheric nitrogen to ammonia, the first stable product of nitrogen fixation.

Topic: Biology, Mineral Nutrition, NEET
What is the role of nomenclature in dealing with isomers in Coordination Chemistry?

Options:
A To create more isomers
B To distinguish between isomers with similar names
C To make isomers identical
D To prevent the formation of isomers

The correct answer is:
To distinguish between isomers with similar names

Solution:
Nomenclature helps in distinguishing between isomers that may have similar names, thereby clarifying their identities.

Topic: Chemistry, Coordination Compounds, NEET
What is the role of noradrenaline in mood changes?

Options:
A It inhibits neurotransmitter receptors.
B It catalyzes the degradation of neurotransmitters.
C It activates neurotransmitter receptors.
D It is not related to mood changes.

The correct answer is:
It activates neurotransmitter receptors.

Solution:
Noradrenaline is one of the neurotransmitters that plays a role in mood changes by activating neurotransmitter receptors.

Topic: Chemistry, Chemistry in Everyday Life, NEET
What is the role of nucleases in pancreatic juice?

Options:
A To aid in the digestion of carbohydrates
B To aid in the digestion of proteins
C To aid in the digestion of nucleic acids
D To aid in the absorption of vitamins

The correct answer is:
To aid in the digestion of nucleic acids

Solution:
Nucleases are enzymes present in pancreatic juice that help to break down nucleic acids, such as DNA and RNA, into smaller nucleotides. These enzymes are essential for the Digestion and Absorption of nucleic acids by the body.

Topic: Biology, Digestion and Absorption, NEET
What is the role of nucleoli in the cell?

Options:
A Protein synthesis
B DNA replication
C RNA synthesis
D Cell division

The correct answer is:
RNA synthesis

Solution:
Nucleoli are spherical structures present in the nucleoplasm and are the site for active ribosomal RNA synthesis. Larger and more numerous nucleoli are present in cells actively carrying out protein synthesis.

Topic: Biology, Cell - The Unit of Life, NEET
What is the role of nucleophiles in organic reactions?

Options:
A They bring an electron pair to the reactive site.
B They take away an electron pair from the reactive site.
C They provide a positive charge to the substrate.
D They stabilize carbocations.

The correct answer is:
They bring an electron pair to the reactive site.

Solution:
The paragraph describes nucleophiles as reagents that bring an electron pair to the reactive site of the substrate.

Topic: Chemistry, General Organic Chemistry, NEET
What is the role of oxygen in plant growth?

Options:
A It acts as a source of energy
B It helps in cell enlargement
C It releases metabolic energy
D It provides the medium for enzymatic activities

The correct answer is:
It releases metabolic energy

Solution:
Oxygen is essential for plant growth as it helps in releasing metabolic energy, which is essential for growth activities.

Topic: Biology, Plant - Growth and Development, NEET
What is the role of oxygen in the aerobic process of respiration in the electron transport chain?

Options:
A To drive the process by removing hydrogen from the system
B To synthesize ATP
C To act as the final electron donor
D To act as the initial electron acceptor

The correct answer is:
To drive the process by removing hydrogen from the system

Solution:
The presence of oxygen is vital in the electron transport chain as it drives the whole process by removing hydrogen from the system. Oxygen acts as the final hydrogen acceptor.

Topic: Biology, Respiration in Plants, NEET
What is the role of oxygen in the electron transport chain?

Options:
A To act as the electron donor
B To act as the electron carrier
C To act as the final hydrogen acceptor
D To drive the process by removing hydrogen from the system

The correct answer is:
To act as the final hydrogen acceptor

Solution:
Oxygen acts as the final hydrogen acceptor in the electron transport chain.

Topic: Biology, Respiration in Plants, NEET
What is the role of oxygen in the lead chamber process?

Options:
A Reactant
B Catalyst
C Product
D Adsorbent

The correct answer is:
Reactant

Solution:
The paragraph specifies that in the lead chamber process, dioxygen (O2) is one of the reactants.

Topic: Chemistry, Surface Chemistry, NEET
What is the role of oxygen in the process of respiration?

Options:
A To synthesize ATP from ADP and inorganic phosphate
B To control the enzymatic rates during oxidative phosphorylation
C To remove hydrogen from the system
D To provide energy for oxidation-reduction

The correct answer is:
To remove hydrogen from the system

Solution:
Oxygen acts as the final hydrogen acceptor in the process of respiration, driving the whole process by removing hydrogen from the system.

Topic: Biology, Respiration in Plants, NEET
What is the role of oxygen in the regulation of respiratory rhythm?

Options:
A Significant
B Moderately Significant
C Insignificant
D Very Significant

The correct answer is:
Insignificant

Solution:
The role of oxygen in the regulation of respiratory rhythm is quite insignificant.

Topic: Biology, Breathing and Exchange of Gases, NEET
What is the role of oxygen in the respiration process?

Options:
A To provide energy to cells
B To create pressure gradients between the atmosphere and the alveoli
C To estimate air volume in inspiration and expiration
D To produce carbon dioxide

The correct answer is:
To provide energy to cells

Solution:
Oxygen provides energy to cells during respiration.

Topic: Biology, Breathing and Exchange of Gases, NEET
What is the role of ozone in the atmosphere?

Options:
A To absorb carbon dioxide
B To act as a shield and absorb ultraviolet radiation
C To enhance the greenhouse effect
D To degrade into molecular oxygen

The correct answer is:
To act as a shield and absorb ultraviolet radiation

Solution:
Ozone in the upper part of the atmosphere acts as a shield, absorbing ultraviolet radiation from the sun.

Topic: Biology, Environmental Issues, NEET
What is the role of ozone in water treatment?

Options:
A It increases the concentration of harmful microorganisms.
B It improves the taste of water.
C It acts as a sterilizing agent.
D It promotes the growth of algae.

The correct answer is:
It acts as a sterilizing agent.

Solution:
Ozone is used in water treatment as a sterilizing agent, helping to eliminate harmful microorganisms.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
What is the role of parenchyma cells in leaves, stems and roots of plants?

Options:
A To provide a network of air spaces
B To act as a source of mechanical support
C To serve as specialized organs for gaseous exchange
D To ensure the release of O₂ during photosynthesis

The correct answer is:
To provide a network of air spaces

Solution:
Parenchyma cells in leaves, stems, and roots of plants provide an interconnected network of air spaces, which facilitates gas exchange.

Topic: Biology, Respiration in Plants, NEET
What is the role of parents in preventing substance abuse among adolescents?

Options:
A They have no role to play.
B They have a limited role to play.
C They have a significant role to play.
D They have a minor role to play.

The correct answer is:
They have a significant role to play.

Solution:
Parenting that combines high levels of nurturance and consistent discipline has been associated with a lower risk of substance abuse and that the parents have a special responsibility.

Topic: Biology, Human Health and Diseases, NEET
What is the role of permease in the lac operon?

Options:
A Synthesis of the repressor protein
B Transcription of the operon
C Hydrolysis of lactose into its monomeric units
D Transport of lactose into the cell

The correct answer is:
Transport of lactose into the cell

Solution:
In the absence of a preferred carbon source such as glucose, if lactose is provided in the growth medium of the bacteria, the lactose is transported into the cells through the action of permease.

Topic: Biology, Molecular Basis of Inheritance, NEET
What is the role of peroxides in the peroxide effect?

Options:
A They serve as catalysts.
B They stabilize free radicals.
C They enhance the reaction rate.
D They inhibit the reaction.

The correct answer is:
They serve as catalysts.

Solution:
Peroxides serve as catalysts in the peroxide effect, initiating the formation of free radicals and facilitating the reaction.

Topic: Chemistry, Hydrocarbons, NEET
What is the role of P–H bonds in terms of ionization and basicity in these acids?

Options:
A They are ionizable, increasing basicity
B They are ionizable, decreasing basicity
C They are not ionizable and do not affect basicity
D They are not ionizable, but increase basicity

The correct answer is:
They are not ionizable and do not affect basicity

Solution:
The paragraph explains that P–H bonds are not ionizable to give H+ and do not play any role in basicity. Only H atoms attached with oxygen in P–OH form are ionizable and contribute to basicity.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
What is the role of phosphorus in plants?

Options:
A As a structural element of cells
B As a component of energy-related chemical compounds
C To activate or inhibit enzymes
D As a constituent of cell membranes, certain proteins, all nucleic acids, and nucleotides

The correct answer is:
As a constituent of cell membranes, certain proteins, all nucleic acids, and nucleotides

Solution:
Phosphorus is a constituent of cell membranes, certain proteins, all nucleic acids and nucleotides, and is required for all phosphorylation reactions

Topic: Biology, Mineral Nutrition, NEET
What is the role of platelets in the blood?

Options:
A Transport of respiratory gases
B Immune response
C Clotting of blood
D Destruction of foreign organisms

The correct answer is:
Clotting of blood

Solution:
Platelets can release a variety of substances most of which are involved in the coagulation or clotting of blood.

Topic: Biology, Body Fluids and Circulation, NEET
What is the role of platinum, palladium, or nickel in the pyrolysis of alkanes?

Options:
A They act as catalysts.
B They are the reactants.
C They are used as solvents.
D They initiate the combustion reaction.

The correct answer is:
They act as catalysts.

Solution:
Platinum, palladium, or nickel act as catalysts in the pyrolysis of alkanes, facilitating the decomposition of alkanes into smaller fragments.

Topic: Chemistry, Hydrocarbons, NEET
What is the role of pollen grains in seed plants?

Options:
A Carriers of female gametes
B Carriers of male gametes
C Transporters of female gametes
D Transporters of male gametes

The correct answer is:
Carriers of male gametes

Solution:
Pollen grains are the carriers of male gametes in seed plants.

Topic: Biology, Reproduction in Organisms, NEET
What is the role of pressure potential in water transport in plants?

Options:
A To increase water absorption by plant cells
B To regulate water transport up a stem
C To decrease water transport in the xylem
D None of the above

The correct answer is:
To regulate water transport up a stem

Solution:
Pressure potential, denoted as Ψp, plays a major role in regulating water transport up a stem in plants. Negative potential or tension in the water column in the xylem helps to move water up the stem.

Topic: Biology, Transport in Plants, NEET
What is the role of pro-hormone in insulin synthesis?

Options:
A It is processed before becoming a fully mature and functional hormone.
B It contains an extra stretch called the C peptide.
C It is not present in mature insulin.
D It is used to produce insulin chains.

The correct answer is:
It is processed before becoming a fully mature and functional hormone.

Solution:
In mammals, including humans, insulin is synthesised as a pro-hormone (like a pro-enzyme, the pro-hormone also needs to be processed before it becomes a fully mature and functional hormone).

Topic: Biology, Biotechnology and Its Applications, NEET
What is the role of proteins called when they are crucial to the communication system in the body?

Options:
A Receptors
B Enzymes
C Nucleic acids
D Lipids

The correct answer is:
Receptors

Solution:
Proteins crucial to the communication system in the body are called receptors.

Topic: Chemistry, Chemistry in Everyday Life, NEET
What is the role of PS I and PS II in photosynthesis?

Options:
A Absorbing light energy
B Adding CO₂ to RuBP
C Synthesis of ATP
D Synthesis of NADPH

The correct answer is:
Absorbing light energy

Solution:
PS I and PS II are two photosystems that play a role in the light reaction of photosynthesis by absorbing light energy and transferring excited electrons to NAD forming NADH.

Topic: Biology, Photosynthesis in Higher Plants, NEET
What is the role of Pseudomonas in the soil?

Options:
A Oxidize ammonia to nitrite
B Oxidize ammonia to nitrate
C Reduce nitrate to nitrogen
D Reduce nitrate to ammonia

The correct answer is:
Reduce nitrate to nitrogen

Solution:
Ammonia is oxidized to nitrite by the bacteria Nitrosomonas and Nitrococcus. The nitrite is further oxidized to nitrate with the help of the bacterium Nitrobacter. These steps are called nitrification. Nitrate present in the soil is also reduced to nitrogen by the process of denitrification, which is carried by bacteria Pseudomonas and Thiobacillus.

Topic: Biology, Mineral Nutrition, NEET
What is the role of pyridine in the acylation reaction of amines?

Options:
A Pyridine acts as a catalyst.
B Pyridine neutralises the amine.
C Pyridine removes HCl and shifts the equilibrium to the right.
D Pyridine enhances the acidity of the amine.

The correct answer is:
Pyridine removes HCl and shifts the equilibrium to the right.

Solution:
Pyridine serves as a base that removes HCl formed during the acylation reaction, shifting the equilibrium toward the formation of amides.

Topic: Chemistry, Amines, NEET
What is the role of pyridine in the acylation reaction of amines?

Options:
A Pyridine acts as a catalyst to speed up the reaction.
B Pyridine and other bases are used to remove the side product i.e. HCl from the reaction mixture
C Pyridine serves as a solvent to dissolve the water.
D Pyridine donates electrons to the amine, enhancing its nucleophilic character.

The correct answer is:
Pyridine and other bases are used to remove the side product i.e. HCl from the reaction mixture

Solution:
Correct Option is : (B)
Pyridine and other bases are used to remove the side product i.e. HCl from the reaction mixture

Topic: Chemistry, Amines, NEET
What is the role of pyridinium chlorochromate (PC
C) in the oxidation of primary alcohols?

Options:
A To form ketones
B To form carboxylic acids
C To form aldehydes in good yield
D To form alcohols

The correct answer is:
To form aldehydes in good yield

Solution:
Pyridinium chlorochromate (PC

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the role of red phosphorus in the Hell-Volhard-Zelinsky reaction?

Options:
A Catalyst
B Reducing agent
C Solvent
D Halogen source

The correct answer is:
Catalyst

Solution:
Red phosphorus acts as a catalyst in the Hell-Volhard-Zelinsky reaction, facilitating the halogenation of carboxylic acids.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
What is the role of regulatory sequences in inheritance of a character?

Options:
A They provide binding site for RNA polymerase
B They define the end of transcription
C They affect inheritance of a character
D None of the above

The correct answer is:
They affect inheritance of a character

Solution:
Regulatory sequences of a structural gene also affect inheritance of a character.

Topic: Biology, Molecular Basis of Inheritance, NEET
What is the role of release factor in translation process?

Options:
A Binds to the start codon to initiate translation
B Helps in the formation of peptide bond
C Binds to the stop codon to terminate translation
D Adds amino acids to the polypeptide chain

The correct answer is:
Binds to the stop codon to terminate translation

Solution:
The release factor binds to the stop codon, terminating translation and releasing the complete polypeptide from the ribosome.

Topic: Biology, Molecular Basis of Inheritance, NEET
What is the role of renin in regulation of glomerular filtration rate (GFR)?

Options:
A It increases the glomerular blood flow
B It decreases the glomerular blood flow
C It stimulates the GFR back to normal
D It reduces the GFR to normal

The correct answer is:
It stimulates the GFR back to normal

Solution:
Renin released by JGA in response to a fall in GFR stimulates the glomerular blood flow, and therefore, the GFR back to normal.

Topic: Biology, Excretory Products and their Elimination, NEET
What is the role of renin in the Renin-Angiotensin mechanism?

Options:
A Vasodilation
B Adrenal cortex stimulation
C Conversion of angiotensinogen to angiotensin I
D Glomerular blood pressure regulation

The correct answer is:
Conversion of angiotensinogen to angiotensin I

Solution:
Renin converts angiotensinogen in blood to angiotensin I and further to angiotensin II, playing a crucial role in the Renin-Angiotensin mechanism.

Topic: Biology, Excretory Products and their Elimination, NEET
What is the role of resonance in affecting the acidity of carboxylic acids with electron withdrawing groups?

Options:
A Resonance destabilises the conjugate base.
B Resonance stabilises the conjugate base.
C Resonance has no effect on the conjugate base.
D Resonance increases the size of the substituents.

The correct answer is:
Resonance stabilises the conjugate base.

Solution:
Resonance stabilises the conjugate base of carboxylic acids with electron withdrawing groups, increasing their acidity.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
What is the role of restriction enzyme in restriction enzyme digestion and ligation process?

Options:
A To prepare recombinant DNA
B To purify the DNA
C To cut the source DNA and the vector DNA
D To monitor the movement of DNA

The correct answer is:
To cut the source DNA and the vector DNA

Solution:
Restriction enzyme is used to cut the source DNA and the vector DNA in the restriction enzyme digestion and ligation process.

Topic: Biology, Biotechnology - Principles and Processes, NEET
What is the role of Rhizobium in biofertilisers?

Options:
A Absorbing nitrogen from soil
B Passing nitrogen to plants
C Fixing atmospheric nitrogen into organic forms
D Increasing soil fertility

The correct answer is:
Fixing atmospheric nitrogen into organic forms

Solution:
Rhizobium forms symbiotic associations with leguminous plants, fixing atmospheric nitrogen into organic forms that the plant can use as a nutrient.

Topic: Biology, Microbes in Human Welfare, NEET
What is the role of Rhizobium in the formation of nodules on the roots of leguminous plants?

Options:
A To fix atmospheric nitrogen into organic forms
B To improve the soil nutrient quality
C To decrease environmental pollution
D To increase demand for agricultural produce

The correct answer is:
To fix atmospheric nitrogen into organic forms

Solution:
Rhizobium forms nodules on the roots of leguminous plants and fixes atmospheric nitrogen into organic forms, which is used by the plant as a nutrient.

Topic: Biology, Microbes in Human Welfare, NEET
What is the role of RNA catalysts in living systems?

Options:
A RNA catalysts catalyze important biochemical reactions
B RNA catalysts are replaced by protein enzymes
C RNA catalysts are not used in living systems
D RNA catalysts are not important in living systems

The correct answer is:
RNA catalysts catalyze important biochemical reactions

Solution:
RNA catalysts play an important role in living systems by catalyzing important biochemical reactions that are not catalyzed by protein enzymes.

Topic: Biology, Molecular Basis of Inheritance, NEET
What is the role of RNA polymerase III in the process of transcription in Eukaryotes?

Options:
A Transcription of only snRNAs
B Transcription of rRNAs (28S, 18S and 5.8S)
C Transcription of tRNA, 5 srRNA and snRNA
D Transcription of precursor of mRNA

The correct answer is:
Transcription of tRNA, 5 srRNA and snRNA

Solution:
Transcription in eukaryotes are complex process and involves at least three different DNA-dependent RNA polymerases:

The RNA polymerase I transcribes rRNAs of 28S, 18S, and 5.8S types,

The RNA polymerase II transcribes precursor of mRNA, the heterogeneous nuclear RNA (hnRNA).

RNA polymerase III is responsible for transcription of tRNA, 5srRNA, and snRNAs (small nuclear RNAs)

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2023 (All India)
What is the role of RNA polymerase III in the process of transcription in eukaryotes?

Options:
A Transcribes rRNAs (28S, 18S and 5.8S)
B Transcribes tRNA, 5S rRNA and snRNA
C Transcribes precursor of mRNA
D Transcribes only snRNAs

The correct answer is:
Transcribes tRNA, 5S rRNA and snRNA

Solution:
The RNA polymerase I transcribe rRNAs (28S, 18S, and 5.8S), whereas the RNA polymerase III is responsible for transcription of tRNA, 5S rRNA, and snRNAs (small nuclear RNAs). The RNA polymerase II transcribes a precursor of mRNA, the heterogeneous nuclear RNA (hnRNA).

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2021
What is the role of RNA polymerase in transcription?

Options:
A It facilitates opening of the helix
B It catalyses transcription of all types of RNA
C It initiates transcription by binding to the promoter
D All of the above

The correct answer is:
All of the above

Solution:
RNA polymerase catalyses transcription of all types of RNA,initiates transcription by binding to the promoter and facilitates opening of the helix.

Topic: Biology, Molecular Basis of Inheritance, NEET
What is the role of RNAi in eukaryotic organisms?

Options:
A Replication of mobile genetic elements
B Cellular defense mechanism
C Prevention of translation of mRNA
D Infection by viruses

The correct answer is:
Cellular defense mechanism

Solution:
RNAi takes place in all eukaryotic organisms as a method of cellular defense.

Topic: Biology, Biotechnology and Its Applications, NEET
What is the role of RNAi in preventing infestation of tobacco plants by nematodes?

Options:
A Replication of mobile genetic elements
B Prevention of translation of mRNA
C Infection by viruses
D No role

The correct answer is:
Prevention of translation of mRNA

Solution:
RNA interference takes place in tobacco plants as a method of cellular defense to prevent infestation by nematodes. It involves silencing of specific mRNA through complementary dsRNA molecules, preventing translation of the mRNA)

Topic: Biology, Biotechnology and Its Applications, NEET