datavorous/entrance-exam-dataset huggingface dataset:
Which of the following biomolecules does have a phosphodiester bond?

Options:
A Monosaccharides in a polysaccharide
B Amino acids in a polypeptide
C Nucleic acids in a nucleotide
D Fatty acids in a diglyceride

The correct answer is:
Nucleic acids in a nucleotide

Solution:
Phosphodiester bond is formed between two nucleotides of nucleic acid.

A phosphodiester bond occurs when exactly two of the hydroxyl groups in phosphoric acid react with hydroxyl groups on other molecules to form two ester bonds.

Proteins have presence of peptide bond or amide linkage, carbohydrates have glycosidic bond or ether linkage, while lipids have presence of ester bonds.

Topic: Biology, Biomolecules (B), NEET, NEET 2015 (Phase 2)
Which of the following biphenyls is optically active?

Options:
A
B
C
D

The correct answer is:

Solution:
This molecule is optically active because this does not have the plane of symmetry due to restriction rotation around the bond, due to the large size atoms are attached to it.
It is optically active (Non super imposable on its mirror image)

Topic: Chemistry, General Organic Chemistry, NEET, NEET 2016 (Phase 1)
Which of the following blocks the entry of additional sperm, once a single sperm cell encounters ova?

Options:
A Corpus luteum
B Plasma membrane
C Corona radiata
D Zona pellucida

The correct answer is:
Zona pellucida

Solution:
The zona pellucida (ZP) is an important, integral structure for the egg both before and after fertilization. The zona pellucida (ZP) is a name given to a clear (lucid) zone or region that surrounds the unfertilized egg and works to keep out the additional sperm that hangs around after the first union. It even stays close to the developing cells after fertilization to help out along the road to implantation in the uterus or womb.

Topic: Biology, Human Reproduction, NEET
Which of the following bonds are formed by removal of water molecule?

I. Peptide bond II. Glycosidic bond III. Phosphodiester bond IV. Hydrogen bonds

Options:
A I and II
B II, III and IV
C I, II and III
D I, II and IV

The correct answer is:
I, II and III

Solution:
Peptide bond is between amino acids. The -COOH of one amino acid interacts with -NH2 of other amino acid and this causes removal of one water molecule. Glycosidic bond is formed between monosaccharides. This bond is between aldehydic or ketonic group and hydroxyl group. This bond formation also releases water molecule. In phosphodiester bond formation the bond is formed between hroxyl groups and this too releases water molecules. Hydrogen bond is seen between nitrogen bases and no water molecule is removed in this formation.

Topic: Chemistry, Biomolecules, NEET
Which of the following bonds exhibits the most ionic character?

Options:
A N—H
B F—H
C C—H
D O—H

The correct answer is:
F—H

Solution:
Correct Option is : (B)
F—H

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which of the following bonds has the highest bond energy?

Options:
A O-O
B S-S
C Se-Se
D Te-Te

The correct answer is:
S-S

Solution:
S-S bonds has the highest bond energy as the size increases from S to Te, the bond dissociation energy decreases the non bonding electron pair of O-O bonds have strong repulsion which makes it weak in comparison with S-S bond so, the S-S bond has highest bond energy.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which of the following bone doesn't articulates with any other bone of the body?

Options:
A Ribs
B Femur
C Humerus
D Hyoid

The correct answer is:
Hyoid

Solution:
The hyoid is unique in that it doesn't articulated with other bones. The tongue is attached to the hyoid, the styloid processes of the temporal bones, and the mandible .

Topic: Biology, Locomotion and Movement, NEET
Which of the following bones is not a cranial bone?

Options:
A Frontal bone
B Occipital bone
C Zygomatic bone
D Sphenoid bone

The correct answer is:
Zygomatic bone

Solution:
In human skull, there are two types of bones:
1. Cranial bones, which include - Parietal bone, Frontal bone, Temporal bone, Occipital bone, Sphenoid bone and Ethmoid bone.
2. Facial bones, which include - Lacrimal bone, Nasal bone, Zygomatic bone, Maxilla, Mandible, etc.

Topic: Biology, Locomotion and Movement, NEET
Which of the following bracketed keys correctly describes the Whittaker's five kingdom classification?

Options:
A
B
C
D

The correct answer is:

Solution:
According to Whittaker's classification:
Kingdom Monera includes organisms with ill-defined nucleus (prokaryotes).
Kingdom Protista includes organisms with well-defined nucleus (eukaryotes) which have a single cell.
Kingdom Plantae includes multicellular eukaryotes that are autotrophic.
Kingdom Fungi includes multicellular eukaryotes that are saprophytic.
Kingdom Animalia includes multicellular eukaryotes that are holozoic.

Topic: Biology, The Living World, NEET
Which of the following branches of biology applies to both plants and animals?

Options:
A Entomology
B Zoology
C Bacteriology
D Taxonomy

The correct answer is:
Taxonomy

Solution:
Taxonomy is the branch of biology that is applied to both plants and animals. The classification of plants into various groups is called plant taxonomy or systematic botany. Similarly, the classification of animals is called animal taxonomy or systematic zoology. Entomology is the study of insects. Bacteriology is the study of bacteria.

Topic: Biology, The Living World, NEET
Which of the following breeds by crossing Bikaneri ewes and Marino rams?

Options:
A Hisardale
B Sahiwal
C Leghorn
D Hilsa

The correct answer is:
Hisardale

Solution:
Cross-breeding allows the desirable qualities of two different breeds to be combined. The progeny hybrid animals may themselves be used for commercial production. Alternatively, they may be subjected to some form of inbreeding and selection to develop new stable breeds that may be superior to the existing breeds. Many new animal breeds have been developed by this approach. Hisardale is a new breed of sheep developed in Punjab by crossing Bikaneri ewes and Marino rams.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
Which of the following brings variations among siblings?

Options:
A Independent assortment of genes.
B Crossing over.
C Linkage.
D Both (A) and (B)

The correct answer is:
Both (A) and (B)

Solution:
Independent assortment of genes means that allele pair separate during the formation of gametes independently; it means that traits are transmitted to offspring independently of one another. Crossing over is the exchange of genetic material between homologous chromosomes. Both the process are responsible for the variations seen among siblings.

Topic: Biology, Principles of Inheritance and Variation, NEET
Which of the following bryophytes provides a product that is commonly used as fuel?

Options:
A Funaria
B Sphagnum
C Polytrichum
D Marchantia

The correct answer is:
Sphagnum

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
Which of the following $B t$ crops is being grown in India by the farmers?

Options:
A Maize
B Cotton
C Brinjal
D Soyabean

The correct answer is:
Cotton

Solution:
Bt toxin is produced by a bacterium called Bacillus thuringiensis (Bt). Examples of Bt crops are Bt cotton, Bt corn, rice, tomato, potato and soyabean, etc. In India Bt cotton is grown by farmers extensively.

Topic: Biology, Biotechnology and Its Applications, NEET, NEET 2013 (All India)
Which of the following can accelerate the rate of decomposition of the detritus?

Options:
A If the detritus contains lignin, chitin, tannins and cellulose
B If the detritus is present in acidic soil
C If the moisture and aeration are at optimum
D If the temperature is below 10°C

The correct answer is:
If the moisture and aeration are at optimum

Solution:
Factors Affecting Decomposition: The rate of decomposition of detritus is controlled by the chemical nature of detritus and a number of climatic factors given below.
a) Chemical nature of detritus. Decomposition of detritus is slow if it contains lignin, chitin, tannins (phenolics) and cellulose. It is rapid if detritus possesses more of nitrogenous compounds (like proteins, nucleic acids) and water-soluble reserve carbohydrates or sugars.
b)Temperature and c) soil moisture is the most important climatic factors that regulate decomposition through their effects on the activities of soil microbes.
d) Aeration: It is required for the activity of decomposers and detritivores. Reduced aeration will slow down the process of decomposition.

e) Salinity: The alkaline soil increase the detritus breakdown.
So, the warm and moist environment favour decomposition whereas low temperature and anaerobiosis inhibit decomposition resulting in buildup of organic materials.

Topic: Biology, Ecosystem, NEET
Which of the following can act as molecular scissors?

Options:
A RNA polymerase
B DNA polymerase
C Restriction enzymes
D DNA ligase

The correct answer is:
Restriction enzymes

Solution:
Option (3) is the correct answer because the cutting of DNA at specific location became possible with the use of restriction enzymes. So, they are also called molecular scissors.
The DNA fragments can be joined together by using DNA ligase. They are called molecular glue.
DNA polymerase helps in the extension step of PCR.

Topic: Biology, Biotechnology - Principles and Processes, NEET, NEET 2023 (Manipur)
Which of the following can be associated with STI?

Options:
A Abortions
B Pelvic inflammatory diseases
C Ectopic pregnancy
D All of these

The correct answer is:
All of these

Solution:
Complications related to STI or STD if untreated include pelvic inflammatory diseases (PID), abortions, still births, ectopic pregnancies, infertility or cancer of the reproductive tract.

Topic: Biology, Reproductive Health, NEET
Which of the following can be categorised as an age-related disorder?

Options:
A Myasthenia gravis
B Tetany
C Muscular dystrophy
D Osteoporosis

The correct answer is:
Osteoporosis

Solution:
Diseases are classified as Contagious and Non contagious. Contagious diseases include those conditions that spread with the help of pathogen. Non-contagious do not spread by pathogens. These include Heart conditions Cancer, etc. Age related disorders are also included in this group. Such conditions are known as Geriatric condition. Examples are Arthritis, Osteoporosis, Rheumatoid arthritis, Dementia, Parkinson's disease, Dementia etc.

Topic: Biology, Locomotion and Movement, NEET
Which of the following can be considered as ligands in coordination compounds?

Options:
A Counter ions
B Coordination numbers
C Small molecules like H2O
D Large molecules like proteins

The correct answer is:
Small molecules like H2O

Solution:
Ligands in coordination compounds can include small molecules like H2O.

Topic: Chemistry, Coordination Compounds, NEET
Which of the following can be considered as ligands in coordination compounds?

Options:
A Metals
B Hydrocarbons
C Ions or molecules bound to the central atom/ion
D Counter ions

The correct answer is:
Ions or molecules bound to the central atom/ion

Solution:
Ligands in coordination compounds are ions or molecules bound to the central atom/ion.

Topic: Chemistry, Coordination Compounds, NEET
Which of the following can be expected if scientists succeed in introducing apomictic gene into hybrid varieties of crops ?

Options:
A Polyembryony will be seen and each seed will produce many plantlets
B Seeds of hybrid plants will show longer dormancy
C Farmers can keep on using the seeds produced by the hybrids to raise new crop year after year
D There will be segregation of the desired characters only in the progeny

The correct answer is:
Farmers can keep on using the seeds produced by the hybrids to raise new crop year after year

Solution:
It Apomictic gene are introduced into hybrid crop. Varieties, the seed formed in them without fertilisation, leads to continuation of desired combination of characters. For unlimited generations, thus Farmers can keep their seeds for next year.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET, NEET 2022 (Phase 2)
Which of the following can be included under natural methods of birth control?

Options:
A Rhythm method
B Coitus interruptus
C Lactational amenorrhea
D All of these

The correct answer is:
All of these

Solution:
The rhythm method is also known as periodic abstinence. It involves abstaining from coitus during day 10 to 17 of the menstrual cycle, as ovulation is most likely to occur in this period and the chances of pregnancy are high.
Coitus interruptus is a method which involves the withdrawal of the penis from the vagina before ejaculation.
Lactational amenorrhea is based on the fact that ovulation does not occur in the period of intense lactation after parturition. Thus, the chances of pregnancy are low in this period.
All three of them are included under natural methods of birth control, as all of them work on the principles of nature and do not require any mechanical aid.

Topic: Biology, Reproductive Health, NEET
Which of the following can be obtained from amniotic fluid of the amniotic cavity that surround the developing foetus?

Options:
A Cells of the foetus skin
B Mesenchymal pluripotent cells
C Hematopoietic stem cells
D All of the above

The correct answer is:
All of the above

Solution:
Amniotic fluid contains cells from the skin of the fetus and other sources. It can be a rich source of multipotent mesenchymal, hematopoietic, neural, epithelial, and endothelial stem cells.

Topic: Biology, Reproductive Health, NEET
Which of the following can be used as a bioweapon in wars?

Options:
A A pathogen
B Toxin from a pathogen
C A deliver system for the bioweapon agent
D All of the above

The correct answer is:
All of the above

Solution:
Biowar is the type of war where biological toxins or infectious agents are utilized with the intention of killing humans, animals or plants or incapacitate them. The weapon of biological origin cane be a pathogen, or toxin compound. It can also be a good delivery system for the bioweapon agent.

Topic: Biology, Biotechnology and Its Applications, NEET
Which of the following can be used as a prefix for the aldehyde group?

Options:
A Formyl
B Oxo
C Alkoxy
D Both A and B

The correct answer is:
Both A and B

Solution:
Correct Option is : 4
Both A and B

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following can be used as a prefix for the -CONH2group?

Options:
A Carbamoyl
B Amide
C Carboamine
D None of these

The correct answer is:
Amide

Solution:
Correct Option is : 2
Amide

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following can be used as a prefix for the -COOH group?

Options:
A Carboxy
B Carbamoyl
C Carboxylic acid
D Oic acid

The correct answer is:
Carboxy

Solution:
Correct Option is : 1
Carboxy

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following can be used as a suffix for the -CN group?

Options:
A Cyano
B Nitrile
C Carbonitrogen
D None of these

The correct answer is:
Nitrile

Solution:
Correct Option is : 2
Nitrile

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following can be used as drying agent for ammonia?

Options:
A CaO
B Anhydrous CaCl2
C P2O5
D Conc. H2SO4

The correct answer is:
CaO

Solution:
CaO can be used as drying agent for ammonia as except CaO, all react with NH3 . Anhyd. CaCl2 forms CaNH38Cl2 with NH3 . P2O5 is acidic in nature and H2SO4 is a strong acid and therefore, these react with NH3 .

Topic: Chemistry, s Block Elements, NEET
Which of the following can be used as the halide component for Friedel-Crafts reaction?

Options:
A Chlorobenzene
B Bromobenzene
C Chloroethene
D Isopropyl chloride

The correct answer is:
Isopropyl chloride

Solution:
Isopropyl chloride would form a stable carbocation.

In Freidel-Crafts alkylation reaction, the electrophile-carbocation is formed.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET, NEET 2016 (Phase 2)
Which of the following can be used in the filtration of oils and syrups?

Options:
A Slime moulds
B Diatoms
C Dinoflagellates
D Protozoans

The correct answer is:
Diatoms

Solution:
In diatoms, the cell walls form two thin overlapping shells, which fit together as in a soapbox. The walls are embedded with silica and thus the walls are indestructible. Thus, diatoms have left behind large amounts of cell wall deposits in their habitat; this accumulation over billions of years is referred to as ‘diatomaceous earth’. Being gritty, this soil is used in polishing and filtration of oils and syrups.

Topic: Biology, Biological Classification, NEET
Which of the following can be used to insert the recombinant DNA into the animal cell?

Options:
A Agrobacterium
B Microinjection
C Biolistic
D Gene gun

The correct answer is:
Microinjection

Solution:
Microinjection is a technique of delivering foreign DNA into a living cell (a cell, egg, oocyte or embryos of animals) through a glass micropipette. One end of a glass micropipette is heated until the glass becomes somewhat liquefied. It is quickly stretched forming a very fine tip at the heated end.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following can be used to remove the impurities NO and HNO3 from dinitrogen gas?

Options:
A Aqueous sulphuric acid containing potassium dichromate
B Sodium hydroxide solution
C Activated charcoal
D All of the above

The correct answer is:
Aqueous sulphuric acid containing potassium dichromate

Solution:
The paragraph states that the impurities NO and HNO3 can be removed from dinitrogen gas by passing the gas through aqueous sulphuric acid containing potassium dichromate.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following can not exist in +4 state?

Options:
A Berkelium
B Thorium
C Nobelium
D Curium

The correct answer is:
Nobelium

Solution:
Correct Option is : 3
Nobelium

Topic: Chemistry, d and f Block Elements, NEET
Which of the following can produce a colour change from yellowish brown to light green in acidified aqueous solution of Iron (III) chloride?

Options:
A H2 gas
B O2
C Addition of zinc and HCl
D Simple addition of HCl

The correct answer is:
Addition of zinc and HCl

Solution:
Zn+2HCl→ZnCl2+2(H)
FeCl3+(H)→FeCl2+HCl
Zinc and HCl produce nascent hydrogen which reduces yellowish brown FeCl3 to light green FeCl2 .

Topic: Chemistry, d and f Block Elements, NEET
Which of the following can react with both HCl and NaOH?

Options:
A Zn(OH)2
B BeO
C Al2O3
D All of these

The correct answer is:
All of these

Solution:
As Zn(OH)2 , BeO, Al2O3 are amphoteric, so they can react with both HCl and NaOH

Topic: Chemistry, Ionic Equilibrium, NEET
Which of the following can reduce Tollen's reagent?

Options:
A HCOOH
B C6H5NHOH
C CH3CHO
D All of these

The correct answer is:
All of these

Solution:
Here all these compounds can reduce Tollen's reagent.
CH3CHO+2Ag(NH3)2++3OH-→CH3COO-+2Ag+2H2O+4NH3
C6H4NHOH+2[Ag(NH3)2]++2OH-→C6H5NO+4NH3+2Ag+2H2O
HCOOH+2[Ag(NH3)2]++2OH-→2Ag+4NH3+CO2+2H2O

Topic: Chemistry, Aldehydes and Ketones, NEET
Which of the following can result in breaking of hymen?

Options:
A Sports like riding or cycling
B Intercourse
C Sudden fall
D More than one option is correct

The correct answer is:
More than one option is correct

Solution:
Hymen
- It is the membranous structure partially covering the vagina.
- It is usually torn during the first intercourse (coitus) but can also be torn or broken by a sudden fall/jolt / jerk/vaginal tampon insertion/active participation in sports like horse riding, cycling, etc.
- In some women, hymen may sometimes persist even after coitus.

Topic: Biology, Human Reproduction, NEET
Which of the following can show tautomerism here.

Options:
A
B
C
D Both B and C

The correct answer is:
Both B and C

Solution:
Here Both B and C can show tautomerism as migration of H+ is possible in them to form enol form.

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following can work as a dehydrating agent for alcohols

Options:
A H2SO4
B Al2O3
C H3PO4
D All of these

The correct answer is:
All of these

Solution:
H2SO4,Al2O3 and H3PO4 all can act as dehydrating agent.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Which of the following cannot be detected in a developing foetus by amniocentesis?

Options:
A Klinefelter's syndrome
B Sex of the foetus
C Down's syndrome
D Jaundice

The correct answer is:
Jaundice

Solution:
Amniocentesis is a foetal sex determination test based on the chromosomal pattern in the amniotic fluid surrounding the developing embryo. Jaundice is a condition not based on chromosomal pattern. It is a disease related to liver dysfunctions.

Topic: Biology, Reproductive Health, NEET, NEET 2013 (All India)
Which of the following cannot be explained on the basis of Mendel's law of dominance?

Options:
A The discrete unit controlling a particular character is called a factor
B Out of one pair of factors one is dominant, and the other is recessive
C Alleles do not show any blending and both the characters recover as such in F2 generation
D Factors occur in pairs

The correct answer is:
Alleles do not show any blending and both the characters recover as such in F2 generation

Solution:
Law of Segregation: This law is based on the fact that the alleles do not show any blending and that both the characters are recovered as such in the F2 generation though one of these is not seen at the F1 stage. Though the parents contain two alleles during gamete formation, the factors or alleles of a pair segregate from each other such that a gamete receives only one of the two factors.

Topic: Biology, Principles of Inheritance and Variation, NEET
Which of the following cannot be polarized?

Options:
A Ultrasonic waves
B Radiowaves
C Ultraviolet rays
D X - rays

The correct answer is:
Ultrasonic waves

Solution:
All electromagnetic waves are polarized or polarizable in nature (Light is an electromagnetic wave and that's why sunglasses are able to block part of it by allowing light of only certain polarizations through them). Sound waves cannot be polarized.

Topic: Physics, Wave Optics, NEET
Which of the following cannot be used as a test for H2O2 ?

Options:
A A paper dipped in PbS (black) turns white when brought in contact with H2O2
B It liberates iodine from KI solution which gives blue coloure with starch solution
C It gives blue colour with K4[Fe(CN)6]
D It decolourises acidified KMnO4 solution

The correct answer is:
It gives blue colour with K4[Fe(CN)6]

Solution:
H2O2 does not give blue colour with K4[Fe(CN)6] so option C is incorrect here.

Topic: Chemistry, s Block Elements, NEET
Which of the following cannot behave like a Lewis acid?

Options:
A CO 3 2−
B Zn2+
C SO3
D SiCl4

The correct answer is:
CO 3 2−

Solution:
CO 3 2− doesn’t have a vacant d-orbital .

Topic: Chemistry, Ionic Equilibrium, NEET
Which of the following can't be considered as an advantage of amniocentesis?

Options:
A Prenatal diagnostics
B Detection of genetic disorders
C Detection of congenital defects
D Determination of sex to abort the female fetus.

The correct answer is:
Determination of sex to abort the female fetus.

Solution:
Amniocentesis is a procedure that is conducted to remove the amniotic fluid from the uterus. This fluid surrounds and protects the baby during pregnancy. Amniotic fluid is composed of live fetal cells and substances like alpha-fetoprotein which provide crucial information about baby's genetic health. This test is conducted to identify birth defects and any genetic disorders. It can also be used to determine a baby's gender

Topic: Biology, Reproductive Health, NEET
Which of the following can't be included under glucan?

Options:
A Starch
B Cellulose
C Pectin
D Glycogen

The correct answer is:
Pectin

Solution:
A glucan is a polysaccharide of D-glucose linked by together glycosidic bonds.
Starch - α -1, 4 and α -1, 6-glucans; Cellulose - -1, 4 -glucan; Glycogen - α -1, 4 and α -1, 6-glucans
Pectin - α -, galacturonic acid. Pectin is found in the cell wall of plants.

Topic: Chemistry, Biomolecules, NEET