datavorous/entrance-exam-dataset huggingface dataset:
Bacillus thuringiensis is a good

Options:
A Biofertilizer
B Biopesticide
C Biofuel
D Single cell protein

The correct answer is:
Biopesticide

Solution:
Bacillus thuringiensis is a Gram-positive, soil bacterium commonly used as a biopesticide. The bacteria produce a proteinaceous toxin called thurioside, which is insecticidal in nature. The bacterial spores are sprayed to control insect pests flies, moths, mosquitoes, etc.

Topic: Biology, Microbes in Human Welfare, NEET
Bacillus thuringiensis is widely used as:

Options:
A Insecticide
B Weedicides
C Rodenticide
D None of the above

The correct answer is:
Insecticide

Solution:
Bacillus thuringiensis is widely used to control butterfly caterpillars. Spore of Bt are available as sachets which are mixed with water and sprayed onto vulnerable plants such as Brassica and fruit trees, where they are eaten by insects larvae. In the gut of the larvae, the toxin is released and the larvae geta killed.

Topic: Biology, Microbes in Human Welfare, NEET
Bacteria are present in which of the following kingdom?

Options:
A Monera
B Protista
C Animalia
D Fungi

The correct answer is:
Monera

Solution:
Monera is a kingdom that contains unicellular organisms with a prokaryotic cell organization, such as bacteria. They are single-celled organisms with no true nuclear membrane.

Topic: Biology, Biological Classification, NEET
Bacteria attacking the dead animals, represents:

Options:
A First link of the food chain and are known as primary producers
B Second link of the food chain and are herbivorous
C Third link of the food chain and are tertiary consumers
D The end of food chain and are decomposers

The correct answer is:
The end of food chain and are decomposers

Solution:
Bacteria attacking the dead animals represent the end of the food chain and are decomposers. These are the organisms that obtain energy from chemical breakdown of organisms. They secrete enzymes to decompose dead matters and then absorb the broken down products. Bacteria are specialised to breakdown organic materials that are difficult for other organisms to digest. They also fulfil a vital role in the ecosystem, returning the constituents of organic matter to the environment in inorganic forms so that they can again be assimilated by producers.

Topic: Biology, Ecosystem, NEET
Bacteria genetically engineered to express a cDNA from a plant cell will

Options:
A synthesize a protein with the same sequence of amino acids as in the plant and, therefore, the protein will have the same structure and function as in the plant
B synthesize a protein with essentially the same sequence of amino acids as in the plant but with differences relating to different codons between prokaryotes and eukaryotes
C not be able to synthesize a protein due to the presence of exon, splicing sequences in the DNA sequence from the plant
D not be able to synthesize a protein because translation is coupled with transcription and post- transcriptional processing does not occur in it.

The correct answer is:
synthesize a protein with the same sequence of amino acids as in the plant and, therefore, the protein will have the same structure and function as in the plant

Solution:
The bacteria which is genetically engineered to express a cDNA from a plant cell will synthesize a protein with the same sequence of amino acids as in the plant. Thus, the protein will have the same structure as it had in the plant. Also, it will perform the same function which it performed in the plant.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Bacteria may reproduce by

Options:
A binary fission
B producing spores
C a sort of sexual reproduction by adopting a primitive type of DNA transfer from one bacterium to the other.
D all of these

The correct answer is:
all of these

Solution:
The single-celled bacterium reproduces by binary fission where it divides into two identical daughter cells. This process of fission begins when the DNA of the bacteria replicates and divides into two. When the conditions are not suitable, some bacteria produce spores and undergo asexual reproduction. These unicellular organisms also reproduce by transferring DNA which can be either floating in the environment (transformation), when the DNA moves from one bacterium to another through a conjugation tube between them by the process of conjugation.

Topic: Biology, Biological Classification, NEET
Bacteria on its outer layer contains

Options:
A glycocalyx
B cell membrane
C cell wall
D all of these

The correct answer is:
all of these

Solution:
On the outer layer as a cell envelop the bacteria consists of tightly bound three-layered structure i.e., the outermost glycocalyx followed by the cell wall then the plasma membrane.

Topic: Biology, Biological Classification, NEET
Bacteria protect themselves from viruses by fragmenting viral DNA with

Options:
A ligase
B endonuclease
C exonuclease
D gyrase

The correct answer is:
endonuclease

Solution:
In 1963 two enzymes responsible for restricting the growth of Bacteriophage in E. coli were isolated. One of these added methyl groups to bacterial DNA, while other cut viral DNA. The enzyme which cuts the DNA was later named as restriction endonuclease.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Bacteria that are saprotrophs but can be a parasite and cause disease upon introduction to host body are called as

Options:
A Obligate saprotroph
B Obligate parasite
C Facultative parasite
D Facultative saprotroph

The correct answer is:
Facultative parasite

Solution:
In biology, the term 'facultative' means 'having the capacity to live under more than one specific set of environmental conditions, as a plant that can lead either a parasitic or a nonparasitic life or a bacterium that can live with or without air.' Thus, a facultative parasite is a saptroph that can also live as a parasite.

Topic: Biology, Biological Classification, NEET
Bacteria that cause pneumonia are

Options:
A Streptobacilli and Haemophilus influenzae
B Pneumococcus pneumoniae and Diplococcus influenzae
C Lactococcus pneumoniae and Thermophilus influenzae
D Streptococcus pneumoniae and Haemophilus influenzae

The correct answer is:
Streptococcus pneumoniae and Haemophilus influenzae

Solution:
Bacteria like Streptococcus pneumoniae and Haemophilus influenzae are responsible for the disease pneumonia in humans which infects the alveoli (air-filled sacs) of the lungs. As a result of the infection, the alveoli get filled with fluid leading to severe problems in respiration. The symptoms of pneumonia include fever, chills, cough and headache. In severe cases, the lips and finger nails may turn gray to bluish in colour. A healthy person acquires the infection by inhaling the droplets/aerosols released by an infected person or even by sharing glasses and utensils with an infected person.

Topic: Biology, Human Health and Diseases, NEET
Bacteria that live in most harsh habitats are

Options:
A eubacteria
B cyanobacteria
C mycoplasma
D archaebacteria

The correct answer is:
archaebacteria

Solution:
Archae groups are similar to eukaryotic organisms because they lack a part of the cell wall and they are similar to bacteria in a way that their genetic material is spread throughout the cell. Thus, they are a blend of bacteria and eukaryotes. Archae can live only in areas without oxygen. A remarkable trait of archaebacterial is their ability to survive in extreme environments which include very salty, acidic, harsh and hot surroundings. Due to this trait, it was also concluded that they were a very ancient form of life to evolve on earth.

Topic: Biology, Biological Classification, NEET
Bacterial leaf blight of rice is caused by a species of

Options:
A Xanthomonas
B Pseudomonas
C Altertaria
D Erwinta

The correct answer is:
Xanthomonas

Solution:

Topic: Biology, Mineral Nutrition, NEET, NEET 2008 (Screening)
Bacteriophage is made up of

Options:
A Carbon and nitrogen
B DNA
C Nucleoprotein (Nucleic acid + protein)
D Protein only

The correct answer is:
Nucleoprotein (Nucleic acid + protein)

Solution:
A bacteriophage is a virus that infects bacteria. In its tadpole-like structure, DNA is found inside the proteinous head. Nucleoproteins are any proteins commonly called conjugated proteins that are structurally associated with nucleic acids, either DNA or RNA.

Topic: Biology, Biological Classification, NEET
Bacteriophages are generally

Options:
A ss DNA viruses
B ds DNA viruses
C ss RNA viruses
D ds RNA viruses

The correct answer is:
ds DNA viruses

Solution:
Bacteriophages are virus that lives as parasite inside bacterial cell. Bacteriophages generally has double stranded DNA as their genetic material.

Topic: Biology, Biological Classification, NEET
Bacterium divides every 35 minutes. If a culture containing 105 cells per mL is grown for 175 minutes, what will be the cell concentration per mL after 175 minutes?

Options:
A 5 × 1 0 5 cells
B 3 5 × 1 0 5 cells
C 3 2 × 1 0 5 cells
D 1 7 5 × 1 0 5 cells

The correct answer is:
3 2 × 1 0 5 cells

Solution:
1 × 1 0 5 &xrarr; 35 min 2 × 1 0 5 &xrarr; 70 min 4 × 1 0 5
&xrarr; 105 min 8 × 1 0 5 &xrarr; 140 min 1 6 × 1 0 5
&xrarr; 175 min 3 2 × 1 0 5

Topic: Biology, Cell Cycle and Cell Division, NEET
Baculoviruses are pathogens that attack

Options:
A Insects
B Arthropods
C Aphids
D Both (a) and (b)

The correct answer is:
Both (a) and (b)

Solution:
Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. They have been shown to have no negative impacts on plants, mammals, birds, fish, or even on non-target insects.

Topic: Biology, Microbes in Human Welfare, NEET
Baculoviruses based insecticide has been found to eliminate

Options:
A Arthropods.
B Annelids.
C Platyhelminthes.
D Aschelminthes.

The correct answer is:
Arthropods.

Solution:
Baculovirues are group of pathogen that infect and kill many insects and arthropods. These viruses belong to the virus genus Nucleopolyhedrovirus. These have excellent insecticidal applications due to their narrow spectrum and been species-specific. They do not show ay negative impact on plants and other animal groups. It has been used as insecticide for cotton plantation.

Topic: Biology, Microbes in Human Welfare, NEET
Baeyer's reagent is :

Options:
A Acidic potassium permanganate solution
B Acidic potassium dichromate solution
C Cold, dilute, aqueous solution of potassium permanganate
D Hot, concentrated solution of potassium permanganat

The correct answer is:
Cold, dilute, aqueous solution of potassium permanganate

Solution:
Baeyer's reagent is cold, dilute, aqueous solution of potassium permanganate

Topic: Chemistry, d and f Block Elements, NEET, NEET 2024 (Re-NEET)
Baeyer's reagent is

Options:
A alkaline permanganate solution
B acidified permanganate solution
C neutral permanganate solution
D aqueous bromine solution

The correct answer is:
alkaline permanganate solution

Solution:
Alkaline KMnO4 solution is called Baeyer's reagent

Topic: Chemistry, Hydrocarbons, NEET
Bagging of emasculated flowers is carried out using

Options:
A Bags made of jute
B Bags made of cellophane paper
C Bags made of butter paper
D Bags made of cotton

The correct answer is:
Bags made of butter paper

Solution:
If the female parent bears bisexual flowers, removal of anthers from the flower bud before the anther dehisces using a pair of forceps is necessary. This step is referred to as emasculation. Emasculated flowers have to be covered with a bag of suitable size, generally made up of butter paper, to prevent contamination of its stigma with unwanted pollen. This process is called bagging. When the stigma of bagged flower attains receptivity, mature pollen grains collected from anthers of the male parent are dusted on the stigma, and the flowers are rebagged, and the fruits allowed to develop.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Bakanae fungal disease is associated with the discovery of

Options:
A 2 , 4-D
B GA
C IAA
D ABA

The correct answer is:
GA

Solution:
Bakane or foolish seedling was first reported by farmers in rice plants. It was found to be caused due to fungi Gibberella fujikuroi. Kurosawa reported the appearance of symptoms of the diseases in uninfected rice seedlings when they were treated with sterile filtrates of the fungus.

Topic: Biology, Plant - Growth and Development, NEET
Bakane disease leads to the discovery of which phytohormone (PGR)?

Options:
A Abscisic acid (ABA)
B Indole acetic acid (IAA)
C Gibberellic acid (GA)
D Indole butyric acid (IBA)

The correct answer is:
Gibberellic acid (GA)

Solution:
Phytohormone is plant hormones that are responsible for the growth and development of the plants. Some of them include gibberellic acid (GA), auxins, abscisic acid (ABA), cytokinins(CK), etc. Bakane disease also called the foolish seedling disease of rice, affects the rice plants, and is caused by the fungi Gibberella fujikuroi. The phytohormone, Gibberellins were first isolated from these fungi which caused the foolish seedling disease of rice plants and thus Bakane's disease led to the discovery of the plant hormone gibberellic acid (GA).

Topic: Biology, Plant - Growth and Development, NEET
Bakelite and polythene are considered as an example of:

Options:
A

Thermosetting polymers

B

Elastomers and thermoplastic polymers

C

Thermoplastic polymers

D

Thermosetting and thermoplastic polymers

The correct answer is:

Thermosetting and thermoplastic polymers

Solution:
Thermosetting polymers: Thermosetting polymers are permanently setting polymers. These polymers are cross linked or heavily branched molecules which on heating in a mould, get hardened and set and cannot be softened again. This hardening on heating is due to cross-linking between different polymer chains to give a three dimensional network solid. Its example includes bakelite.

Thermoplastic polymers: Thermoplastics are linear or slightly branched polymers. They can be repeatedly softened on heating and hardened on cooling and hence can be used again and again without any change in chemical composition and mechanical strength. Its examples include polythene and polypropene.

Topic: Chemistry, Polymers, NEET
Bakelite is a product of the reaction between

Options:
A Formaldehyde and NaOH
B Aniline and Urea
C Phenol and Methanal
D Phenol and Chloroform

The correct answer is:
Phenol and Methanal

Solution:

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Balance the following equation XeF6+ H2O → XeO2F2+ HF

Options:
A XeF6+ 2H2O → XeO2F2+ 4HF
B XeF6+ H2O → XeO2F2+ 2HF
C XeF6+ 3H2O → XeO2F2+ 6HF
D XeF6+ H2O → XeO2F2+ 3HF

The correct answer is:
XeF6+ H2O → XeO2F2+ 3HF

Solution:
Correct Option is : (D)
XeF6+ H2O → XeO2F2+ 3HF

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Balbiani rings are site of

Options:
A RNA synthesis
B Lipid synthesis
C Nucleotide synthesis
D Polysaccharide synthesis

The correct answer is:
RNA synthesis

Solution:
Balbiani rings are the sites of particularly active RNA synthesis on the polytene chromosomes of Chironomids. Three such sites occur on the fourth chromosome in the salivary glands of Chironomuslarva.

Topic: Biology, Molecular Basis of Inheritance, NEET
Balbiani rings are sites of:

Options:
A Nucleotide synthesis
B Polysaccharide synthesis
C RNA and protein synthesis
D Lipid synthesis

The correct answer is:
RNA and protein synthesis

Solution:
Polytene Chromosomes: It was discovered by Balbiani. They are found in permanent prophase stage. The size of the polytene chromosomes is 2000μm. They were observed in the cell of salivary glands of Chironomus larva of Dipteran insect.

Special Characteristic: They become giant due to endomitosis or endoduplication. Large swellings are found on some places of each strand that are called puffs (Balbiani rings). In puffs, DNA is uncoiled for rapid transcription of RNA that undergoes translation to form proteins.

Topic: Biology, Cell - The Unit of Life, NEET, NEET 2015 (Phase 2)
.Bali, Javan and Caspian are the sub-species of which of the following?

Options:
A Lion
B Tiger
C Panther
D Cheetah

The correct answer is:
Tiger

Solution:
Recent extinctions of species includes quagga (Africa), thylacine (Australia), Steller's sea cow (Russia), the dodo (Mauritius) and three subspecies (Bali, Javan, Caspian) of tiger.

Topic: Biology, Biodiversity and its Conservation, NEET
Bali, Javan, Caspian are

Options:
A Species of Panthera tigris
B Subspecies of Panthera tigris
C Genus of Panthera tigris
D Subgenus of Panthera tigris

The correct answer is:
Subspecies of Panthera tigris

Solution:
Three subspecies of Panthera tigris (tiger) are Bali, Javan, and Caspian.

Topic: Biology, Biodiversity and its Conservation, NEET
Barax is converted into crystalline baron by the following steps
Borax →XH3BO3→∆B2O3Y→∆B
X and Y are respectively

Options:
A HCl,Mg
B HCl,C
C C,Al
D dil HCl

The correct answer is:
dil HCl

Solution:
Here X is dil HCl and Y is Al
B 2 O 3 → Δ Al B (Crystalline)
B 2 O 3 → Δ Mg B (Amorphous)

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Barbiturates are potent

Options:
A hypnotics
B antimicrobials
C antacids
D antiseptics

The correct answer is:
hypnotics

Solution:
Barbiturates is an important class of tranquillizers. They are used as hypnotics i.e., sleep producing agent.

Topic: Chemistry, Chemistry in Everyday Life, NEET
Barophilic prokaryotes:

Options:
A grow and multiply in very deep marine sediments
B occur in water containing high concentrations of barium hydroxide
C readily grow and divide in sea water enriched in any soluble salt of barium
D grow slowly in highly alkaline frozen lakes at high altitudes.

The correct answer is:
grow and multiply in very deep marine sediments

Solution:
Barophilic prokaryotes grow and multiply in very deep marine sediments. A barophilic prokaryote, also generally defined as a barophile, is a type of organism which occurs and exists at high-pressure zones, like a deep-sea bacterium and archaebacteria.

Topic: Biology, Biological Classification, NEET, NEET 2005
Barr body is absent in female of

Options:
A Klinefelter's syndrome
B Turner's syndrome
C normal female
D Down syndrome in female

The correct answer is:
Turner's syndrome

Solution:
Barr body is a rod-like structure visible in the somatic cells of females. Since females have two X chromosomes, only one is functional and the other undergoes coiling to form a rod-shaped structure during interphase, known as Barr body. Turner's syndrome is female has only one X chromosome thus Barr body is absent.

Topic: Biology, Principles of Inheritance and Variation, NEET
Barr body is absent in

Options:
A Klinefelter's syndrome
B Turner's syndrome
C Normal female
D Down syndrome in female

The correct answer is:
Turner's syndrome

Solution:
Barr body is a compact structure of chromatin formed in the nuclei of mammalian females as a means to allow sex dosage compensation. A person with Turner syndrome will have no Barr bodies due to them only have 1 X chromosome. Instead of having a set of 44 autosomes + 1 pair of sex chromosomes (either XX or XY) - the normal human karyotype, the person has only 44 autosomes + 1 X chromosomes.

Topic: Biology, Principles of Inheritance and Variation, NEET
Barrier potential of a $p-n$ junction diode does not depend on:

Options:
A diode design
B temperature
C forward bias
D doping density

The correct answer is:
diode design

Solution:
Barrier potential depends upon temperature, doping density and forward biasing.

Topic: Physics, Semiconductors, NEET, NEET 2003
Bartholin's glands are situated:

Options:
A on the sides of the head of some amphibians
B at the reduced the end of birds
C on either side of vagina in humans
D on either side of vas deferens in humans

The correct answer is:
on either side of vagina in humans

Solution:
The Bartholin's glands are located on each side of the vaginal opening. They secrete fluid that helps lubricate the vagina.
Related Theory
A Bartholin's cyst develops when the duct exiting the Bartholin's gland becomes blocked. The fluid produced by the gland then accumulates, causing the gland to swell and form a cyst.

Topic: Biology, Human Reproduction, NEET, NEET 2003
Basal bodies are associated with the formation of:

Options:
A phragmoplast
B cilia and flagella
C cell plate
D kinetochore

The correct answer is:
cilia and flagella

Solution:
The basal body is a microtubule-based protein structure located at the base of eukaryotic cilia. These organelles assemble cilia and flagella which are responsible for all the motility and sensory functions in the eukaryotic cells.

Topic: Biology, Cell - The Unit of Life, NEET
Basal metabolic rate is controlled by

Options:
A Thyroxine
B ADH
C Aldosterone
D Growth hormone

The correct answer is:
Thyroxine

Solution:
BMR (Basal Metabolic Rate) of an organism is the minimum rate of energy conversion required just to stay alive during complete rest or sleep. BMR is controlled by thyroxine hormone secreted by thyroid gland.

Topic: Biology, Chemical Coordination and Integration, NEET
Basal part of ovule which lies opposite to micropyle is

Options:
A Hilum
B Micropyle
C Chalaza
D Nucellus

The correct answer is:
Chalaza

Solution:
The ovule is integumented megasporangium which is protected by one or more envelope called integuments. Integuments encircles the ovule except at micropyle. Opposite the micropylar end is the chalaza representing the basal part of the ovule.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Base catalysed condensation between the following compounds followed by dehydration gives methyl vinyl ketone:

Options:
A HCHO and CH3COCH3
B HCHO and CH3CHO
C Two molecules of CH3CHO
D Two molecules of CH3COCH3

The correct answer is:
HCHO and CH3COCH3

Solution:
It is an aldol condensation reaction between formaldehyde and acetone in basic medium.
HCHO+ CH 3 COCH 3 → OH − HO− CH 2 − CH 2 − COCH 3 → Δ H 2 C = CH− COCH 3

Topic: Chemistry, Aldehydes and Ketones, NEET
Base strength of
(1) $\mathrm{CH}_3 \stackrel{\ominus}{\mathrm{CH}_2}$
(2) $\mathrm{H}_2 \mathrm{C}=\stackrel{\ominus}{\mathrm{C} \mathrm{H}}$ and
(3) $\mathrm{H}-\mathrm{C} \equiv \stackrel{\ominus}{\mathrm{C}}$
is in the order of

Options:
A (2) $>$ (1) $>$ (3)
B (3) $>(2)>(1)$
C $(1)>(3)>(2)$
D (1) $>$ (2) $>$ (3)

The correct answer is:
(1) $>$ (2) $>$ (3)

Solution:
Key Idea : Stronger the acid, weaker is its conjugate base.
The strength of their conjugate acids are in the order :
$$
\mathrm{HC} \equiv \mathrm{CH}>\mathrm{H}_2 \mathrm{C}=\mathrm{CH}_2>\mathrm{CH}_3-\mathrm{CH}_3
$$
Therefore, the correct order of strength of their conjugate base is :
$$
\mathrm{CH}_3 \mathrm{CH}_2^{\ominus}>\mathrm{H}_2 \mathrm{C}=\stackrel{\ominus}{\mathrm{C}} \mathrm{H}>\mathrm{HC} \equiv \stackrel{\ominus}{\mathrm{C}}
$$

Topic: Chemistry, General Organic Chemistry, NEET, NEET 2008 (Screening)
Based on data given below for the electrode potential, reducing power of Fe2+,Al and Br- will increase in the order
Br2(aq)+2e-→2Br-(aq);Eo=+1.08V
Al3+(aq)+3e-→Al(s);Eo=-1.66V
Fe3+(aq)+e-→Fe+2(aq);Eo=+0.77V

Options:
A Br-<Fe2+<Al
B Al<Br-<Fe2+
C Fe2+<Al<Br-
D Al<Fe2+<Br-

The correct answer is:
Br-<Fe2+<Al

Solution:
Reducing power, i.e. the tendency to lose electrons increases as the reduction potential decreases.

Topic: Chemistry, Electrochemistry, NEET
Based on different functional (R) groups the following amino acids are formed. Select the correct amino acid according to different functional groups.

Options:
A R→H (glycine),
B R→CH3 (alanine),
C R→CH2OH (serine)
D All the above

The correct answer is:
All the above

Solution:
Amino acid consists af an amino group, a carboxylic acid group H group and an R group attached to a carbon atom. Different types of amino acid vary on the basis of R group only. Simplest amino acid is Glycine having an H in place of R group, alanine has methyl group and serine has an OH group.

Topic: Chemistry, Biomolecules, NEET