datavorous/entrance-exam-dataset huggingface dataset:
What is the main function of our respiratory system?

Options:
A To provide energy to cells
B To produce carbon dioxide
C To transport oxygen to cells and remove carbon dioxide
D To estimate air volume in inspiration and expiration

The correct answer is:
To transport oxygen to cells and remove carbon dioxide

Solution:
Our respiratory system, comprising two lungs and associated air passages, has evolved to perform the function of transporting oxygen to the cells and removing carbon dioxide from there.

Topic: Biology, Breathing and Exchange of Gases, NEET
What is the main function of photosynthesis in plants?

Options:
A To release energy
B To produce ATP
C To exchange large volumes of gases
D To produce CO₂ and H₂O

The correct answer is:
To exchange large volumes of gases

Solution:
During photosynthesis, large volumes of gases are exchanged in plants, but they are well adapted to take care of their own needs.

Topic: Biology, Respiration in Plants, NEET
What is the main function of photosystem I in photosynthesis?

Options:
A Absorption of 680 nm wavelength light
B Absorption of 700 nm wavelength light
C Water splitting
D Synthesis of NADPH + H⁺

The correct answer is:
Absorption of 700 nm wavelength light

Solution:
In photosystem I, the reaction center chlorophyll a absorbs 700 nm wavelength of red light which causes the electrons to become excited and transferred to an acceptor molecule.

Topic: Biology, Photosynthesis in Higher Plants, NEET
What is the main function of photosystem II in the light reaction phase of photosynthesis?

Options:
A Absorption of 700 nm wavelength light
B Absorption of 680 nm wavelength light
C Water splitting
D Formation of ATP

The correct answer is:
Absorption of 680 nm wavelength light

Solution:
In photosystem II, the reaction center chlorophyll a absorbs 680 nm wavelength of red light which causes the electrons to become excited and jump into an orbit farther from the atomic nucleus.

Topic: Biology, Photosynthesis in Higher Plants, NEET
What is the main function of Potassium in plants?

Options:
A Involved in protein synthesis
B Helps to maintain an anion-cation balance
C Activates enzymes
D All of the above

The correct answer is:
All of the above

Solution:
Potassium is involved in protein synthesis, opening and closing of stomata, activation of enzymes, and in the maintenance of the turgidity of cells.

Topic: Biology, Mineral Nutrition, NEET
What is the main function of progesterone in female individuals?

Options:
A Supporting pregnancy
B Stimulating spermatozoa formation
C Regulating female sexual behaviour
D Stimulating testosterone secretion

The correct answer is:
Supporting pregnancy

Solution:
Progesterone supports pregnancy. It also acts on the mammary glands and stimulates the formation of alveoli and milk secretion.

Topic: Biology, Chemical Coordination and Integration, NEET
What is the main function of restriction enzymes?

Options:
A To add methyl groups to DNA
B To cut DNA
C To recognise specific sequences of base pairs
D To restrict the growth of bacteriophage

The correct answer is:
To cut DNA

Solution:
Restriction enzymes cut DNA at specific locations.

Topic: Biology, Biotechnology - Principles and Processes, NEET
What is the main function of root hairs in plants?

Options:
A Absorbing light
B Absorbing carbon dioxide
C Absorbing water and minerals
D Producing oxygen

The correct answer is:
Absorbing water and minerals

Solution:
The root hairs are responsible for absorbing water and minerals, as they increase the surface area for absorption.

Topic: Biology, Transport in Plants, NEET
What is the main function of sebaceous glands?

Options:
A Elimination of excretory waste
B Facilitating a cooling effect on the body surface
C Secreting bile-containing substances
D Providing a protective oily covering for the skin

The correct answer is:
Providing a protective oily covering for the skin

Solution:
The main function of sebaceous glands is to provide a protective oily covering for the skin. It eliminates certain substances like sterols, hydrocarbons, and waxes through sebum.

Topic: Biology, Excretory Products and their Elimination, NEET
What is the main function of Sphagnum moss in terms of economic importance?

Options:
A It is used as food for herbivores
B It is used as fuel
C It is used as packing material for trans-shipment
D It is used for medicinal purposes

The correct answer is:
It is used as packing material for trans-shipment

Solution:
Species of Sphagnum, a moss, provide peat that have long been used as fuel, and as packing material for trans-shipment of living material because of their capacity to hold water.

Topic: Biology, Plant Kingdom, NEET
What is the main function of starch in plants?

Options:
A Energy storage
B Structural support
C Cellulose synthesis
D DNA replication

The correct answer is:
Energy storage

Solution:
Starch is commonly used by plants as a means of storing energy, as stated in the passage.

Topic: Chemistry, Biomolecules, NEET
What is the main function of the anatomical setup of the lungs in the thorax?

Options:
A To protect the lungs from external factors
B To maintain the shape of the lungs
C To ensure changes in the volume of the thoracic cavity reflect in the pulmonary cavity
D To provide structural support for the lungs

The correct answer is:
To ensure changes in the volume of the thoracic cavity reflect in the pulmonary cavity

Solution:
The anatomical setup of the lungs in the thorax is such that any change in the volume of the thoracic cavity will be reflected in the lung (pulmonary) cavity, which is essential for breathing. This arrangement allows for changes in the pulmonary volume without direct manipulation.

Topic: Biology, Breathing and Exchange of Gases, NEET
What is the main function of the bone marrow in the human body?

Options:
A Filter of the blood
B Micro-environment for T-lymphocytes
C Storage of erythrocytes
D Trapping of blood-borne microorganisms

The correct answer is:
Micro-environment for T-lymphocytes

Solution:
The bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced. It provides micro-environments for the development and maturation of T-lymphocytes.

Topic: Biology, Human Health and Diseases, NEET
What is the main function of the brain?

Options:
A To control voluntary movements
B To regulate the circadian rhythms of the body
C To control the heart and lungs
D All of the above

The correct answer is:
All of the above

Solution:
The brain acts as the "command and control system" and controls various functions such as voluntary movements, balance, vital organs, circadian rhythms, endocrine glands and human behavior.

Topic: Biology, Neural Control and Coordination, NEET
What is the main function of the cell membrane and the tonoplast in plant cells?

Options:
A To act as a barrier to movement
B To determine the movement of molecules in or out of the cell
C To maintain the solute potential of the cell
D To store the central vacuole contents

The correct answer is:
To determine the movement of molecules in or out of the cell

Solution:
The cell membrane and the tonoplast (membrane of the vacuole) together are important determinants of movement of molecules in or out of the cell.

Topic: Biology, Transport in Plants, NEET
What is the main function of the cell wall in plants and fungi?

Options:
A To give shape to the cell
B To protect the cell from infection
C To provide a barrier to undesirable macromolecules
D All of the above

The correct answer is:
All of the above

Solution:
The cell wall in plants and fungi serves multiple functions, including giving shape to the cell, protecting the cell from mechanical damage and infection, helping in cell-to-cell interaction, and providing a barrier to undesirable macromolecules.

Topic: Biology, Cell - The Unit of Life, NEET
What is the main function of the centrosome during prophase?

Options:
A Chromatin condensation
B Movement towards opposite poles of the cell
C Radiating out microtubules
D Forming mitotic apparatus

The correct answer is:
Movement towards opposite poles of the cell

Solution:
During prophase, the centrosome, which had undergone duplication during the S phase of interphase, begins to move towards opposite poles of the cell. This movement of the centrosome is an important step in the formation of the mitotic apparatus, which is necessary for the proper separation of the chromosomes during mitosis.

Topic: Biology, Cell Cycle and Cell Division, NEET
What is the main function of the Collecting Duct in urine formation?

Options:
A Reabsorption of electrolytes
B Concentration of urine
C Maintenance of osmolarity
D Maintenance of pH and ionic balance

The correct answer is:
Concentration of urine

Solution:
The Collecting Duct plays a role in producing a concentrated urine by reabsorbing large amounts of water.

Topic: Biology, Excretory Products and their Elimination, NEET
What is the main function of the conducting part of the respiratory system?

Options:
A Diffusion of O₂ and CO₂
B Transport of atmospheric air
C Clearing of foreign particles
D Humidification and regulation of body temperature

The correct answer is:
Transport of atmospheric air

Solution:
The conducting part of the respiratory system is responsible for transporting atmospheric air to the alveoli, clearing it from foreign particles, humidifying it and bringing it to body temperature.

Topic: Biology, Breathing and Exchange of Gases, NEET
What is the main function of the cuticle in the epidermis?

Options:
A To prevent the loss of water
B To regulate the process of transpiration and gaseous exchange
C To enclose stomatal pore
D To become specialised in shape and size

The correct answer is:
To prevent the loss of water

Solution:
The outside of the epidermis is often covered with a waxy thick layer called the cuticle which prevents the loss of water. The cuticle is absent in roots. Stomata are structures present in the epidermis of leaves that regulate the process of transpiration and gaseous exchange. The cuticle plays an important role in preventing water loss and maintaining the water balance of the plant.

Topic: Biology, Anatomy of Flowering Plants, NEET
What is the main function of the enzyme DNA-dependent DNA polymerase in the process of replication in living cells like E. coli?

Options:
A To separate the two strands of DNA
B To catalyse the polymerization of deoxynucleotides
C To make mistakes during replication
D To act as a template for the synthesis of new complementary strands

The correct answer is:
To catalyse the polymerization of deoxynucleotides

Solution:
The main function of the enzyme DNA-dependent DNA polymerase in the process of replication in living cells like E. coli is to catalyse the polymerization of deoxynucleotides.

Topic: Biology, Molecular Basis of Inheritance, NEET
What is the main function of the excretory system in frogs?

Options:
A To produce eggs or sperm
B To eliminate nitrogenous wastes
C To digest food
D To circulate oxygen throughout the body

The correct answer is:
To eliminate nitrogenous wastes

Solution:
The excretory system in frogs is responsible for removing nitrogenous wastes, such as urea, from the body.

Topic: Biology, Structural Organisation in Animals, NEET
What is the main function of the glomerulus in urine formation?

Options:
A Reabsorption
B Secretion
C Collection
D Filtration

The correct answer is:
Filtration

Solution:
The main function of the glomerulus in urine formation is to filter the blooD)

Topic: Biology, Excretory Products and their Elimination, NEET
What is the main function of the golgi apparatus?

Options:
A Synthesising proteins
B Packaging materials
C Transporting materials to the cell membrane
D Modifying proteins

The correct answer is:
Packaging materials

Solution:
The golgi apparatus primarily performs the function of packaging materials, to be delivered either to the intra-cellular targets or secreted outside the cell.

Topic: Biology, Cell - The Unit of Life, NEET
What is the main function of the hard chewing surface of the teeth?

Options:
A To produce enzymes
B To aid in swallowing
C To break down food
D To produce hormones

The correct answer is:
To break down food

Solution:
The hard chewing surface of the teeth, made up of enamel, helps in the mastication of food. It grinds and crushes food, making it easier to swallow and digest.

Topic: Biology, Digestion and Absorption, NEET
What is the main function of the heart in mammals?

Options:
A To pump deoxygenated blood
B To pump mixed blood
C To pump oxygenated blood
D To pump blood to gills/lungs/skin

The correct answer is:
To pump oxygenated blood

Solution:
In mammals, the heart is divided into two separate atria and two separate ventricles. The left atrium receives oxygenated blood from the lungs and the right atrium receives deoxygenated blood from the rest of the body. The left ventricle then pumps out the oxygenated blood to the rest of the body, while the right ventricle pumps out the deoxygenated blood to the lungs to be oxygenated again.

Topic: Biology, Body Fluids and Circulation, NEET
What is the main function of the heavy meromyosin (HMM) component?

Options:
A To run close to the F actins
B To act as an ATPase enzyme
C To mask the active binding sites
D To project outwards at regular distance and angle

The correct answer is:
To act as an ATPase enzyme

Solution:
The main function of the HMM component is to act as an ATPase enzyme and has binding sites for ATP and active sites for actin.

Topic: Biology, Locomotion and Movement, NEET
What is the main function of the human excretory system?

Options:
A Produce urine
B Transport urine
C Store urine
D Filter waste

The correct answer is:
Filter waste

Solution:
The main function of the human excretory system is to filter waste and excess substances from the blood, producing urine, which is then excreted from the body.

Topic: Biology, Excretory Products and their Elimination, NEET
What is the main function of the inter-ventricular septum?

Options:
A To separate the right and left atria
B To separate the right and left ventricles
C To connect the right and left atria
D To connect the right and left ventricles

The correct answer is:
To separate the right and left ventricles

Solution:
The thick-walled inter-ventricular septum separates the right and left ventricles.

Topic: Biology, Body Fluids and Circulation, NEET
What is the main function of the large intestine?

Options:
A Digestion
B Absorption
C Secretion
D Storage

The correct answer is:
Absorption

Solution:
The large intestine mainly functions to absorb water, minerals and certain drugs, and to secrete mucus to help in adhering the waste (undigesteD) particles together and lubricating it for an easy passage.

Topic: Biology, Digestion and Absorption, NEET
What is the main function of the light meromyosin (LMM) component?

Options:
A To run close to the F actins
B To act as an ATPase enzyme
C To mask the active binding sites
D To provide structural support

The correct answer is:
To provide structural support

Solution:
The main function of the LMM component is to provide structural support to the meromyosin.

Topic: Biology, Locomotion and Movement, NEET
What is the main function of the mitochondria in the cell?

Options:
A To increase the surface area
B To produce cellular energy
C To divide the organelle by fission
D To store single circular DNA molecules

The correct answer is:
To produce cellular energy

Solution:
Mitochondria are the "powerhouses" of the cell as they produce cellular energy in the form of ATP through the process of aerobic respiration.

Topic: Biology, Cell - The Unit of Life, NEET
What is the main function of the origin of replication?

Options:
A To control the copy number of the linked DNA
B To start replication
C To eliminate nontransformants
D To permit the growth of transformants

The correct answer is:
To start replication

Solution:
The origin of replication (ori) is a sequence from where replication starts and any piece of DNA when linked to this sequence can be made to replicate within the host cells.

Topic: Biology, Biotechnology - Principles and Processes, NEET
What is the main function of the outer three wall layers of a microsporangium?

Options:
A To nourish the developing pollen grains
B To help in the formation of microspore tetrads
C Protection and help in dehiscence of anther to release the pollen
D To form the microspores

The correct answer is:
Protection and help in dehiscence of anther to release the pollen

Solution:
The outer three wall layers perform the function of protection and help in dehiscence of anther to release the pollen.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
What is the main function of the pith in a stem?

Options:
A To provide structural support
B To conduct water and minerals
C To store starch
D To connect the phloem and xylem

The correct answer is:
To store starch

Solution:
A large number of rounded, parenchymatous cells with large intercellular spaces which occupy the central portion of the stem constitute the pith. These cells store starch.

Topic: Biology, Anatomy of Flowering Plants, NEET
What is the main function of the primary root in dicotyledonous plants?

Options:
A To absorb water and nutrients from the soil
B To produce flowers and fruits
C To provide support to the stem
D To store food and water

The correct answer is:
To absorb water and nutrients from the soil

Solution:
The primary root in dicotyledonous plants is responsible for absorbing water and nutrients from the soil to support the growth and development of the plant.

Topic: Biology, Morphology of Flowering Plants, NEET
What is the main function of the reaction center in photosystem II?

Options:
A Absorb red light of 680 nm wavelength
B Transport electrons to NADP⁺
C Excite electrons in PS I
D Reduce NADP⁺ to NADPH + H⁺

The correct answer is:
Absorb red light of 680 nm wavelength

Solution:
The reaction center chlorophyll a in photosystem II absorbs 680 nm wavelength of red light causing electrons to become excited and jump into an orbit farther from the atomic nucleus.

Topic: Biology, Photosynthesis in Higher Plants, NEET
What is the main function of the root system in plants?

Options:
A Absorption of water and minerals from the soil
B Providing a proper anchorage to the plant parts
C Storing reserve food material
D Synthesis of plant growth regulators

The correct answer is:
Absorption of water and minerals from the soil

Solution:
The main function of the root system in plants is to absorb water and minerals from the soil.

Topic: Biology, Morphology of Flowering Plants, NEET
What is the main function of the salivary glands?

Options:
A To secrete enzymes
B To secrete bile
C To secrete insulin
D To secrete saliva

The correct answer is:
To secrete saliva

Solution:
The main function of the salivary glands is to secrete saliva into the buccal cavity. Saliva contains enzymes that help to break down food, making it easier to swallow and digest.

Topic: Biology, Digestion and Absorption, NEET
What is the main function of the seminal plasma?

Options:
A To provide nutrition to the germ cells
B To lubricate the penis
C To store and transport the sperms
D To provide a conducive environment for the sperms

The correct answer is:
To provide a conducive environment for the sperms

Solution:
The secretions of accessory glands in the male reproductive system, including seminal vesicles, prostate, and bulbourethral glands, make up the seminal plasma. This seminal plasma is rich in fructose,calcium, and certain enzymes and helps provide a conducive environment for the sperms.

Topic: Biology, Human Reproduction, NEET
What is the main function of the sensory papillae in a frog?

Options:
A He.aring
B Smelling
C Touching
D Tasting

The correct answer is:
Tasting

Solution:
The sensory papillae in a frog are organs of touch, which allow the frog to sense its environment through its skin.

Topic: Biology, Structural Organisation in Animals, NEET
What is the main function of the sodium-potassium pump in the neuron?

Options:
A To transport potassium ions into the axon.
B To transport sodium ions into the axon.
C To transport sodium ions outwards and potassium ions into the cell.
D To transport both sodium and potassium ions into the cell.

The correct answer is:
To transport sodium ions outwards and potassium ions into the cell.

Solution:
The sodium-potassium pump transports 3 Na⁺ ions outwards for 2 K⁺ ions into the cell.

Topic: Biology, Neural Control and Coordination, NEET
What is the main function of the stem?

Options:
A Conducting water and minerals
B Storing food
C Spreading out branches
D Providing protection

The correct answer is:
Spreading out branches

Solution:
The main function of the stem is to spread out branches, leaves, flowers and fruits, which are responsible for carrying out photosynthesis and other important plant processes.

Topic: Biology, Morphology of Flowering Plants, NEET
What is the main function of the transport mechanism in living cells?

Options:
A Transporting essential substances
B Removing harmful substances
C Both A) & B)
D None of the above

The correct answer is:
Both A) & B)

Solution:
The transport mechanism in living cells has the function of both providing the cells with essential substances such as nutrients, oxygen, etc, and removing waste or harmful substances continuously for the healthy functioning of tissues.

Topic: Biology, Body Fluids and Circulation, NEET
What is the main gas produced in the fermentation of dough, cheese making, and production of beverages?

Options:
A Methane
B Carbon dioxide
C Hydrogen
D Nitrogen

The correct answer is:
Carbon dioxide

Solution:
The main gas produced during the fermentation of dough, cheese making, and production of beverages is CO₂.

Topic: Biology, Microbes in Human Welfare, NEET
What is the main glucocorticoid in our body?

Options:
A Adrenaline
B Aldosterone
C Cortisol
D Thymosin

The correct answer is:
Cortisol

Solution:
The corticoids, which are involved in carbohydrate metabolism are called glucocorticoids. In our body, cortisol is the main glucocorticoid.

Topic: Biology, Chemical Coordination and Integration, NEET
What is the main goal of a stable community according to the passage?

Options:
A To show variation in productivity
B To be resistant to disturbances and invasions by alien species
C To have a high species richness
D To understand the link between species richness and ecosystem health

The correct answer is:
To be resistant to disturbances and invasions by alien species

Solution:
A stable community should not show too much variation in productivity and must be either resistant or resilient to occasional disturbances (natural or man:made), and it must also be resistant to invasions by alien species.

Topic: Biology, Biodiversity and its Conservation, NEET
What is the main goal of biological control in agriculture?

Options:
A To eradicate all life forms in the field
B To use toxic chemicals and pesticides
C To create a complex system of checks and balances
D To rely on natural predation

The correct answer is:
To rely on natural predation

Solution:
In agriculture, biological control aims to control pests and diseases through natural predation.

Topic: Biology, Microbes in Human Welfare, NEET
What is the main goal of controlling environmental pollution?

Options:
A To encourage environmental degradation
B To discourage environmental protection
C To maintain the quality of the environment
D To increase the level of pollution

The correct answer is:
To maintain the quality of the environment

Solution:
The main goal of controlling environmental pollution is to maintain the quality of the environment by protecting it from degradation and depletion.

Topic: Biology, Environmental Issues, NEET