datavorous/entrance-exam-dataset huggingface dataset:
Which of the following structures of the human brain is used to connect the two hemispheres of the cerebrum?

Options:
A Corpus quadrigemina
B Cerebral aqueduct
C Crura cerebri
D Corpus callosum

The correct answer is:
Corpus callosum

Solution:
The two hemisphere of cerebrum that is left and right cerebral hemisphere are connected to each other by a tract of nerve fibres called corpus callosum.

Topic: Biology, Neural Control and Coordination, NEET
Which of the following structures or regions is incorrectly paired with its function?

Options:
A Hypothalamus : Production of releasing hormones and regulation of temperature, hunger and thirst
B Limbic system : Consists of fibre tracts that interconnect different regions of brain; controls movement
C Medulla oblongata : Controls respiration and cardiovascular reflexes
D Corpus callosum : Band of fibers connecting left and right cerebral hemispheres

The correct answer is:
Limbic system : Consists of fibre tracts that interconnect different regions of brain; controls movement

Solution:
The limbic system is the part of the brain involved in our behavioural and emotional responses, especially when it comes to behaviours we need for survival: feeding, reproduction and caring for our young, and fight or flight responses.

The cerebellum, which lies below the cerebrum just above the brain stem, coordinates the body's movements.

Topic: Biology, Neural Control and Coordination, NEET, NEET 2018
Which of the following structures represents neoprene polymer?

Options:
A

B

C

D

The correct answer is:

Solution:
Neoprene (synthetic rubber) is a polymer of chloroprene (ie, 2-chloro-1, 3-butadiene).

Topic: Chemistry, Polymers, NEET, NEET 2010 (Screening)
Which of the following structures represents Neoprene polymer?

Options:
A
B
C
D

The correct answer is:

Solution:
As neoprene is a polymer of 2- chloro buta 1, 3- di-ene

Topic: Chemistry, Polymers, NEET
Which of the following structures represents the peptide chain?

Options:
A

B

C

D

The correct answer is:

Solution:
A peptide bond, also referred to as an amide bond, is formed between the $\boldsymbol{\alpha}$-nitrogen atom of one amino acid and the carbonyl carbon of a second amino acid.
Related Theory
Long chain polypeptides can be formed by linking many amino acids to each other via peptide bonds. The peptide bonds of proteins are metastable, and will break spontaneously in a slow process.

Topic: Chemistry, Biomolecules, NEET, NEET 2004
Which of the following structures will be seen in metaphase-I of meiosis-I, in a plant cell that has 64 chromosomes?

Options:
A 16 bivalents
B 16 dyad
C 32 bivalents
D 32 dyad

The correct answer is:
32 bivalents

Solution:
The complex formed by a pair of synapsed homologous chromosomes is called a bivalent or a tetrad. So if the total number of chromosomes is '2n', then the number of the bivalents will be half, i.e., 'n'. Hence, a plant cell having 64 chromosomes, will have 32 bivalents in the stage of Metaphase-I of Meiosis-I.

Topic: Biology, Cell Cycle and Cell Division, NEET
Which of the following subcellular structures cannot be isolated?

Options:
A nuclei
B lysosomes
C mitochondria
D endoplasmic reticulum

The correct answer is:
endoplasmic reticulum

Solution:
When cells are broken up in the lab microsomes are formed. These are similar in activity to Endoplasmic reticulum. These structures are important and used for many experimental purposes. Being similar to ER these structures are used to perform Protein synthesis on a membrane and this helps to understand the actual process that occurs in the cell. Hence ER is always obtained in the form of microsomes and thus cannot be isolated completely. However other organelles can be isolated in the form.

Topic: Biology, Cell - The Unit of Life, NEET
Which of the following substance acts as collector in froth floatation method?

Options:
A Sodium xenate
B Sodium pyrophosphate
C Sodium nitroprusside
D Sodium ethyl xanthate

The correct answer is:
Sodium ethyl xanthate

Solution:
Sodium ethyl xanthate acts as collector for sulphide ore.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which of the following substances acts as a catalyst in the industrial preparation of dihydrogen from methane?

Options:
A Methane
B Carbon monoxide
C Nickel
D Carbon dioxide

The correct answer is:
Nickel

Solution:
Nickel serves as the catalyst in the industrial preparation of dihydrogen from methane.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following substances are misused by certain sportspersons to enhance their performance?

Options:
A Narcotic analgesics
B Anabolic steroids
C Diuretics and certain hormones
D All of the above

The correct answer is:
All of the above

Solution:
Narcotic analgesics are opiod drugs for pain relief. Anabolic steroids are androgens that enhance muscle performance. These include certain drugs and hormones. Diuretics produce large amount of urine . Hence sportsperson use such drugs to reduce their body weight especially to fit in categories that depend on weights. These also help to excrete residue form of steroidal hormones. Hence all these three categories are used by sportspersons.

Topic: Chemistry, Biomolecules, NEET
Which of the following substances can be permanently magnetized?

Options:
A Diamagnetic substances
B Paramagnetic substances
C Ferromagnetic substances
D Antiferromagnetic substances

The correct answer is:
Ferromagnetic substances

Solution:
Ferromagnetic substances can be permanently magnetized and exhibit strong attraction to a magnetic field.

Topic: Chemistry, Solid State, NEET
Which of the following substances can exhibit oxidation states from -4 to +4 for carbon and from -3 to +5 for nitrogen?

Options:
A CN⁻
B HCN
C CO₂
D NH₄⁺

The correct answer is:
CN⁻

Solution:
Correct Option is : (A)
CN⁻

Topic: Chemistry, Redox Reactions, NEET
Which of the following substances exhibits ferrimagnetism?

Options:
A Oxygen (O2)
B Copper (Cu)
C Fe3O4 (magnetite)
D Aluminum (Al)

The correct answer is:
Fe3O4 (magnetite)

Solution:
Fe3O4 (magnetite) is an example of a substance that exhibits ferrimagnetism.

Topic: Chemistry, Solid State, NEET
Which of the following substances, if introduced into the blood stream, would cause coagulation of blood at the site of its introduction?

Options:
A prothrombin
B fibrinogen
C thromboplastin
D heparin.

The correct answer is:
thromboplastin

Solution:
Thrombin acts as an enzyme and catalyses fibrinogen (a soluble plasma protein) into an insoluble fibre like polymer, fibrin. These fibres form a dense network upon the wound and trap blood corpuscles (WBCs, RBCs and platelets) and thus form a clot. Proteolytic cleavage of prothrombin generates thrombin, which converts fibrinogen into fibrin for clot formation. Fibrinogen is a protein produced by the liver which helps stop bleeding by helping blood clots to form. Heparin is used to prevent blood clots from forming.
Related Theory
Thromboplastin is released by the injured tissue. This reacts with $\mathrm{Ca}^{++}$ions present in blood and forms a proteinaceous enzyme called prothrombinase. Later in the presence of $\mathrm{Ca}^{++}$inactivates heparin (anticoagulant) and catalyses prothrombin (inactive plasma protein) into an active thrombin protein. Thrombin acts as an enzyme and catalyses fibrinogen (a soluble plasma protein) into an insoluble fibre like polymer, fibrin. These fibres form a dense network upon the wound and trap blood corpuscles (WBCs, RBCs and platelets) and thus form a clot. This clot seals the wound and stop bleeding. In blood vessels, thromboplastin do not release due to which blood does not clot. But external thromboplastin to blood will cause blood clotting at the site of its introduction due to formation of prothrombinase.
Caution
All the options, except heparin are required during clotting of blood. However, thromboplastin is an enzyme, which is released only when stimulated under suitable condition like at the site of injury; otherwise, are not present in the blood. Prothrombin and fibrinogen are already present in blood. Thus, if the enzyme thromboplastin is introduced into the blood, all the clotting component become active and form a cascade reaction at the site of introduction.

Topic: Biology, Body Fluids and Circulation, NEET, NEET 2005
Which of the following substances, if introduced into the blood stream, would cause coagulation of blood at the site of its introduction?

Options:
A Prothrombin
B Fibrinogen
C Thromboplastin
D Heparin

The correct answer is:
Thromboplastin

Solution:
Fibrinogen, prothrombin, thromboplastin are respectively clotting factors I, II and III.
Thromboplastin released from injured platelets or injured tissue. This converts prothrombin into thrombin in the presence of calcium ions. The thrombin converts fibrinogen into fibrin and the latter froms the clot.

Topic: Biology, Body Fluids and Circulation, NEET
Which of the following substances is an example of a diamagnetic material?

Options:
A Iron (Fe)
B Oxygen (O2)
C Water (H2O)
D Copper (Cu)

The correct answer is:
Water (H2O)

Solution:
Water (H2O) is an example of a diamagnetic substance.

Topic: Chemistry, Solid State, NEET
Which of the following substances is commonly used as an oxidizing agent in laboratory experiments and is known for its strong oxidizing properties?

Options:
A Hydrogen peroxide
B Table salt (sodium chloride)
C Sugar (sucrose)
D Vegetable oil

The correct answer is:
Hydrogen peroxide

Solution:
Hydrogen peroxide is a commonly used oxidizing agent in laboratory experiments due to its strong oxidizing properties.

Topic: Chemistry, Redox Reactions, NEET
Which of the following substituents increases the basic strength of substituted aniline?

Options:
A -NO2 (nitro group)
B -OCH3 (methoxy group)
C -SO3H (sulfonic acid group)
D -COOH (carboxylic acid group)

The correct answer is:
-OCH3 (methoxy group)

Solution:
Electron-releasing groups like -OCH3 increase the basic strength of substituted aniline, while electron-withdrawing groups like -NO2 decrease it.

Topic: Chemistry, Amines, NEET
Which of the following substituents is most likely to deactivate the benzene ring in electrophilic aromatic substitution?

Options:
A Methoxy (-OCH3) group
B Chlorine (-Cl) atom
C Amino (-NH2) group
D Hydroxyl (-OH) group

The correct answer is:
Chlorine (-Cl) atom

Solution:
Chlorine (-Cl) is a deactivating group due to its strong -I effect, which reduces electron density on the benzene ring, making it less reactive in electrophilic aromatic substitution reactions.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following substituted phenols is the strongest acid?

Options:
A
B
C
D

The correct answer is:

Solution:
-NO2 group is electron withdrawing group. Which increases the acidic strength of phenol.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET, NEET 2020 (Phase 2)
Which of the following substrate is not correctly matched with its end products?

Options:
A Nucleic acids → Sugars and bases
B Proteins → Amino acids
C Fats → Monoglycerides
D Polysaccharides → Monosaccharides

The correct answer is:
Fats → Monoglycerides

Solution:
Fats are triglycerides in which three fatty acid combine with one glycerol molecule by ester bond and three molecules of water are released.

Topic: Chemistry, Biomolecules, NEET
Which of the following 'suffixes' is used for "family" in plant classification?

Options:
A -Ales
B -Onae
C -Aceae
D -Ae

The correct answer is:
-Aceae

Solution:
According to ICBN suffixes used for family is -aceae. Name of the family should end with -aceae. For example Fabaceae, Solnaceae, Liliaceae, Brassicaceae.

Topic: Biology, The Living World, NEET
Which of the following sulphates has the highest solubility?

Options:
A BeSO4
B MgSO4
C BaSO4
D CaSO4

The correct answer is:
BeSO4

Solution:
BeSO4 is most soluble because hydration energy is more than lattice energy
BeSO4>MgSO4>CaSO4>SrSO4>BaSO4
Hydration energy decreases, hence solubility decreases

Topic: Chemistry, s Block Elements, NEET
Which of the following symbol is used for five unaffected offspring?

Options:
A
B
C
D

The correct answer is:

Solution:
The symbols are used for pedigree analysis.
a) Symbol is used for unaffected male.
b) Symbol is used for unaffected female.
c) Symbol is used for when the partners are blood relatives.
d) Symbol is used for five unaffected offspring.

Topic: Biology, Principles of Inheritance and Variation, NEET
Which of the following system is most stable for a chelate?

Options:
A Two fused cyclic system
B Three fused cyclic system
C Four fused cyclic system
D Five fused cyclic system

The correct answer is:
Five fused cyclic system

Solution:
Greater is the number of chelate rings, greater is stability of the chelate. Hence, five fused cyclic system is most stable for a chelate.

Topic: Chemistry, Coordination Compounds, NEET
Which of the following system returns the blood from the intestine to the liver?

Options:
A Renal portal system
B Hepatic portal system
C Lymphatic system
D Systemic circulation

The correct answer is:
Hepatic portal system

Solution:
Hepatic portal system is the system of veins comprising the hepatic portal vein and its tributaries. The portal venous system is responsible for directing blood from parts of the gastrointestinal tract to the liver. Substances absorbed in the small intestine travel first to the liver for processing before continuing to the heart. Not all of the gastrointestinal tract is part of this system. The system extends from about the lower portion of the esophagus to the upper part of the anal canal. It also includes venous drainage from the spleen and pancreas.

Topic: Biology, Body Fluids and Circulation, NEET
Which of the following systems is responsible for the uniform mixture of oxygen in a stirred-tank bioreactor?

Options:
A Agitator system
B Sparger system
C Foam control system
D Sampling ports

The correct answer is:
Agitator system

Solution:
A stirred-tank reactor is usually cylindrical or with a curved base to facilitate the mixing of the reactor contents. The stirrer facilitates even mixing and oxygen availability throughout the bioreactor. Alternatively, air can be bubbled through the reactor in a sparged stirred-tank bioreactor. A general bioreactor has an agitator system, an oxygen delivery system and a foam control system, a temperature control system, pH control system and sampling ports so that small volumes of the culture can be withdrawn periodically.
The agitator system ensures the uniform mixing of oxygen and contents of the solution.

Topic: Biology, Microbes in Human Welfare, NEET
Which of the following systems of classification was developed in Linnaeus' time?

Options:
A Three Kingdom system
B Four Kingdom system
C Five Kingdom system
D Two Kingdom system (Plantae and Animalia)

The correct answer is:
Two Kingdom system (Plantae and Animalia)

Solution:
In Linnaeus' time a Two Kingdom system of classification with Plantae and Animalia Kingdoms was developed that included all plants and animals respectively.

Topic: Biology, Biological Classification, NEET
Which of the following taxonomical ranks contain organisms least similar to one another

Options:
A Class
B Genus
C Family
D Species

The correct answer is:
Class

Solution:
The closely related orders are grouped into a class (named as a taxonomical rank in classification) which have least similar organisms to another.

Topic: Biology, The Living World, NEET
Which of the following technique can be used for introduction of hydrophilic recombinant DNA through the cell membranes of a host cell?

Options:
A Microinjection
B Gene gun
C Heat shock method
D All of these

The correct answer is:
All of these

Solution:
The recombinant vector carrying foreign DNA needs to be transferred into the suitable host cells. Several methods have been developed for introduction of recombinant DNA molecule into host cells.

(i) Heat shock method â In this method, DNA is treated with a specific concentration of a divalent cation, such as calcium which increases the efficiency with which DNA enters the bacterium through pores in its cell wall. The rDNA is forced into the cell by incubating the cell with rDNA on ice followed by placing them briefly (heat shock) and then patting them back on ice. This enables the bacteria to take up the rDNA.

(ii) Micro Injection â In this technique foreign DNA is directly and forcibly injected into the nucleus of animal and plant cells through a glass micropipette containing very fine tip of about 0.5 mm diameter.

(iii) Gene gun or biolistics â In this method, cells are bombarded with high velocity micro particles of gold or tungsten coated with DNA.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following technique is not required for DNA fingerprinting?

Options:
A Polymerase chain reaction
B ELISA
C Restriction enzymes
D DNA - DNA hybridization

The correct answer is:
ELISA

Solution:
ELISA does not contribute to DNA fingerprinting. PCR is an automated procedure that generates lots of copies of a specific sequence of DNA, important in DNA fingerprinting. Restriction enzymes are used in cutting DNA samples and analyzing the resulting DNA fragments by DNA fingerprinting indicates which DNA samples have similar restriction sequences. DNA hybridization-DNA fingerprinting, hypervariable and repetitive sequences are detected with hybridization probes.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following techniques is NOT a method for measuring bond lengths?

Options:
A Spectroscopic techniques
B Gravitational techniques
C X-ray diffraction techniques
D Electron-diffraction techniques

The correct answer is:
Gravitational techniques

Solution:
The gravitational techniques are not methods for measuring bond lengths.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which of the following techniques is used to check the progression of restriction enzyme digestion?

Options:
A Insertional inactivation
B Transformation
C Gel electrophoresis
D Polymerase chain reaction

The correct answer is:
Gel electrophoresis

Solution:
The second step in Recombinant DNA technology is cutting of DNA at specific sites. The purified DNA molecules are incubated with restriction enzymes at optimal conditions for carrying out restriction enzyme digestions. The progress of a restriction enzyme digestion is checked with the help of Agarose gel electrophoresis. DNA being a negatively charged molecule moves towards the positive electrode. Similar process is repeated with the vector DNA. The 'gene of interest' obtained from the source DNA and also vector DNA obtained by restriction enzyme digestion are mixed and then ligase is added to it. This leads to formation of recombinant DNA.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following term defines the promotion of flowering at low temperatures?

Options:
A Photoperiodism
B Vernalization
C Thermoperiodism
D Florigen

The correct answer is:
Vernalization

Solution:
Vernalization refers especially to the promotion of flowering during the period of low temperatures. It prevents precocious reproductive development late in the growing season and enables the plant to have sufficient time to reach maturity. Shoot apical meristem perceives low-temperature stimulus.

Topic: Biology, Plant - Growth and Development, NEET
Which of the following terms doesn't mean one and the same?

Options:
A Polygobulia - Polycythaemia
B Scavenger leucocyte - Monocyte
C Bicuspid valve - Mitral valve
D Myocardial infarction - Myocardial ischaemia

The correct answer is:
Myocardial infarction - Myocardial ischaemia

Solution:
The increase in the number of erythrocytes or RBCs is called erythrocytosis or polycythaemia. Monocyte are also called scavenger leucocytes since they can remove cellular debris. The left atrio-ventricular valve has two cusps and hence it is called biscuspid valve. It is also called mitral valve. Myocardial infarction is death of cardiac muscles while myocardial ischaemia is reduced blood supply to cardiac muscle.

Topic: Biology, Body Fluids and Circulation, NEET
Which of the following terms have been grouped correctly?

Options:
A Sclerenchymatous hypodermis: dicot stem
B Collenchymatous hypodermis: monocot stem
C Starch sheath: Pericycle of dicot stem
D Starch sheath: Endodermis of dicot stem

The correct answer is:
Starch sheath: Endodermis of dicot stem

Solution:
In a dicot stem, the outer hypodermis, consists of a few layers of collenchymatous cells just below the epidermis, which provide mechanical strength to the young stem. The innermost layer of the cortex is called the endodermis. The cells of the endodermis are rich in starch grains and the layer is also referred to as the starch sheath. Pericycle is present on the inner side of the endodermis and above the phloem in the form of semi-lunar patches of sclerenchyma.
The monocot stem has a sclerenchymatous hypodermis, a large number of scattered vascular bundles, each surrounded by a sclerenchymatous bundle sheath, and a large, conspicuous parenchymatous ground tissue

Topic: Biology, Anatomy of Flowering Plants, NEET
Which of the following tests can be used to differentiate between pentan-2-one and pentan-3-one?

Options:
A Iodoform Test
B Tollen Test
C Fehling Test
D Lucas Test

The correct answer is:
Iodoform Test

Solution:
Correct Option is : (A)
Iodoform Test

Topic: Chemistry, Aldehydes and Ketones, NEET
Which of the following time durations is required for a pan filled with hot food to cool from 71 °C to 69 °C, given that it initially cooled from 94 °C to 86 °C in 2 minutes when the room temperature was at 20 °C?

Options:
A 38 seconds
B 40 seconds
C 42 seconds
D 44 seconds

The correct answer is:
42 seconds

Solution:
Correct Option is : (C)
42 seconds

Topic: Chemistry, Thermal Properties of Matter, NEET
Which of the following tissue can develop from all the three germinal layers?

Options:
A Epithelial tissue
B Muscular tissue
C Connective tissue
D Nervous tissue

The correct answer is:
Epithelial tissue

Solution:
Epithelial tissue has great regeneration power because when epithelia are injured, they regenerate more rapidly than other tissue and thus facilitate rapid healing of wounds. It is the only tissue that can develop from all the three germinal layers.

Topic: Biology, Structural Organisation in Animals, NEET
Which of the following tissue exerts the greatest control over the body's responsiveness to changing conditions?

Options:
A Connective tissue
B Epithelial tissue
C Muscular tissue
D Nervous tissue

The correct answer is:
Nervous tissue

Solution:
Neural tissue exerts the greatest control over the body's responsiveness to changing conditions. The neuron and neuroglial cells of this tissue can control and co-ordinate the all activities of human body.

Topic: Biology, Structural Organisation in Animals, NEET
Which of the following tissue is absent in vascular bundles of monocot stem?

Options:
A

Cambium

B Xylem
C Phloem
D All of these

The correct answer is:

Cambium

Solution:
Monocot stems have most of their vascular bundles near the outside edge of the stem. The bundles are surrounded by large parenchyma in the cortex region. There is no pith region in monocots. In dicot stems, bundles are present in a ring surrounding parenchyma cells in a pith region.

Topic: Biology, Anatomy of Flowering Plants, NEET
Which of the following tissue is covered by epimysium, perimysium and endomysium?

Options:
A Muscular tissue
B Nervous tissue
C Bones
D Epithelial tissue

The correct answer is:
Muscular tissue

Solution:
The epimysium is the dense connective tissue that surrounds the entire muscle tissue. The perimysium is the connective tissue that surrounds each bundle of muscle fibers. The endomysium is the connective tissue that covers each single muscle fiber or myofiber or muscle cell.

Topic: Biology, Locomotion and Movement, NEET