datavorous/entrance-exam-dataset huggingface dataset:
Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?

Options:
A Genetic code is not ambiguous
B Genetic code is redundant
C Genetic code is nearly universal
D Genetic code is specific

The correct answer is:
Genetic code is nearly universal

Solution:
Although the code is based on work conducted on the bacterium Escherichia coli it is valid for other organisms. This important characteristic of the genetic code is called its universality. It means that the same sequences of 3 bases encode the same amino acids in all life forms from simple microorganisms to complex, multicelled organisms such as human beings.

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2019 (All India)
Which of the following gates correspond to the truth table given below?
\[
\begin{array}{|c|c|c|}
\hline A & B & Y \\
\hline 0 & 0 & 1 \\
0 & 1 & 0 \\
1 & 0 & 0 \\
1 & 1 & 0 \\
\hline
\end{array}
\]

Options:
A NAND
B OR
C \(\mathrm{XOR}\)
D NOR

The correct answer is:
NOR

Solution:
By truth table, $Y=\overline{A+B}$. Therefore it is a NOR gate operation.

Topic: Physics, Semiconductors, AIIMS, AIIMS 2008
Which of the following has positive standard electrode potential?

Options:
A Sn
B Pb
C Ag
D Ni

The correct answer is:
Ag

Solution:
Correct Option is : 3
Ag

Topic: Chemistry, Electrochemistry, NEET
Which of the following has positive standard electrode potential?

Options:
A H2O
B Fe3+
C Ag+
D Br2

The correct answer is:
H2O

Solution:
Correct Option is : 1
H2O

Topic: Chemistry, Electrochemistry, NEET
Which of the following has Standard electrode potential>0?

Options:
A Sc
B Ti
C Cu
D Zn

The correct answer is:
Cu

Solution:
Correct Option is : 3
Cu

Topic: Chemistry, d and f Block Elements, NEET
Which of the following has the highest standard electrode potential?

Options:
A F2
B Co+3
C H2O2
D Li

The correct answer is:
F2

Solution:
Correct Option is : 1
F2

Topic: Chemistry, Electrochemistry, NEET
Which of the following has the highest standard reduction potential?

Options:
A Zn2+
B Ni2+
C Cu2+
D Mn2+

The correct answer is:
Cu2+

Solution:
Correct Option is : 3
Cu2+

Topic: Chemistry, d and f Block Elements, NEET
Which of the following has the least standard electrode potential?

Options:
A F2
B K
C Ca
D Li

The correct answer is:
Li

Solution:
Correct Option is : 4
Li

Topic: Chemistry, Electrochemistry, NEET
Which of the following in sewage treatment removes suspended solids?

Options:
A Tertiary treatment
B Secondary treatment
C Primary treatment
D Sludge treatment

The correct answer is:
Primary treatment

Solution:
Primary treatment is a physical process which involves sequential filtration and sedimentation. Suspended solids are removed in stages; initially, floating debris is removed by sequential filtration. Then the grit (soil and small pebbles) are removed by sedimentation. All solids that settle form the primary sludge and the supernatant forms the effluent. The effluent from the primary settling tank is taken for secondary treatment.

Topic: Biology, Microbes in Human Welfare, NEET, NEET 2017
Which of the following in sewage treatment removes suspended solids?

Options:
A Tertiary treatment
B Secondary treatment
C Primary treatment
D Sludge treatment

The correct answer is:
Primary treatment

Solution:
Primary treatment is a physical process which involves sequential filtration and sedimentation. Suspended solids are removed in stages; initially, floating debris is removed by sequential filtration. Then the grit (soil and small pebbles) are removed by sedimentation. All solids that settle form the primary sludge and the supernatant forms the effluent. The effluent from the primary settling tank is taken for secondary treatment.

Topic: Biology, Environmental Issues, NEET
Which of the following ions can reduce dilute acid to give hydrogen gas?

Options:
A $\mathrm{Ti}^{2+}, \mathrm{Cr}^{2+}$
B $\mathrm{Mn}^{3+}, \mathrm{Ti}^{2+}$
C $\mathrm{Mn}^{3+}, \mathrm{Cr}^{2+}$
D $\mathrm{Co}^{3+}, \mathrm{Cr}^{2+}$

The correct answer is:
$\mathrm{Ti}^{2+}, \mathrm{Cr}^{2+}$

Solution:
Many of transition metals are sufficiently electropositive to react with dilute acid in order to produce hydrogen gas. But those having lower standard reduction potential are not able to liberate $\mathrm{H}_2$ from dilute acid.

Topic: Chemistry, d and f Block Elements, AP EAMCET, AP EAMCET 2022 (06 Jul Shift 1)
Which of the following is a division in taxonomical hierarchy?

Options:
A Dicotyledonae
B Angiospermae
C Diptera
D Sapindales

The correct answer is:
Angiospermae

Solution:
Taxonomic hierarchy represents categories of classification. It is defined as a sequence of categories in a decreasing or increasing order from kingdom to species and vice versa. The kingdom is the highest rank followed by division, class, order, family, genus and species. In plants, Angiospermae represents the rank of division.

Topic: Biology, The Living World, NEET
Which of the following is a monogenetic parasite (has only one host in its life cycle)?

Options:
A Wuchereria bancrofti
B Ascaris
C Plasmodium vivax
D Both (A) and (B)

The correct answer is:
Ascaris

Solution:
Ascaris, an intestinal parasite causes ascariasis. Symptoms of these disease include internal bleeding, muscular pain, fever, anemia and blockage of the intestinal passage. The eggs of the parasite are excreted along with the faeces of infected persons which contaminate soil, water, plants, etc. A healthy person acquires this infection through contaminated water, vegetables, fruits, etc.
Wuchereria (W. bancrofti and W. malayi), the filarial
worms and Malaria causing Plasmodium are digenetic as they require two hosts. The two hosts are primary or definitive and secondary or intermediate. Definitive hosts are responsible for maturity and sexual reproduction of the organism. intermediate hosts harbour the sexuall immature organisms.

Topic: Biology, Human Health and Diseases, NEET
Which of the following is a partial root parasite?

Options:
A Sandalwood
B Mistletoe
C Orobanche
D Ganoderma

The correct answer is:
Sandalwood

Solution:
Sandalwood is a partial root parasite.

Topic: Biology, Organisms and Populations, NEET
Which of the following is a partial root parasite?

Options:
A
Sandal wood

B
Mistletoe

C
Orobanche

D
Ganoderma

The correct answer is:
Sandal wood

Solution:
Sandal wood (Santalum album) is partial root parasite. Mistletoe (Viscum) is considered as hermiparasite that derive a part of nourishment from host plant. Orobanche is a holo parasite that infects species from fabaceae i.e., beans, loranthus. Ganoderma are parasite, basidiocarpic mushrooms.

Topic: Biology, Organisms and Populations
Which of the following is a phospholipid?

Options:
A Sterol
B Cholesterol
C Lecithin
D Steroid

The correct answer is:
Lecithin

Solution:
Lecithin is the most abundant phospholipid present in the cell membrane. It is made up of one molecule of glycerol to which two fatty acid molecules are attached and one phosphoric acid.

Topic: Chemistry, Biomolecules, NEET
Which of the following is a potential side reaction in the Williamson ether synthesis when using secondary or tertiary alkyl halides?

Options:
A Substitution
B Elimination
C Hydrolysis
D Oxidation

The correct answer is:
Elimination

Solution:
When using secondary or tertiary alkyl halides in the Williamson ether synthesis, elimination reactions are a potential side reaction that can occur instead of substitution.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Which of the following is a secondary allylic alcohol?

Options:
A $\mathrm{H}_2 \mathrm{C}=\mathrm{CH}-\mathrm{CH}_2-\mathrm{OH}$
B $\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_2-\mathrm{OH}$
C

D

The correct answer is:

Solution:
Std.12|CH-11|Subtopic-11.2

Topic: Chemistry, Alcohols Phenols and Ethers, MHT CET, MHT CET 2023 (14 May Shift 2)
Which of the following is a secondary Butyl chloride?

Options:
A CH3CH2CH(Cl)CH3
B CH2(Cl)CH2CH2CH3
C CH3C(CH3)(Cl)CH3
D CH2(Cl)CH(CH3)CH3

The correct answer is:
CH3CH2CH(Cl)CH3

Solution:
Correct Option is : 1
CH3CH2CH(Cl)CH3

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Which of the following is a secondary lymphoid organ?

Options:
A Brunner's gland
B Peyer's patches
C Crypts of Leiberkuhn
D Glisson's capsule

The correct answer is:
Peyer's patches

Solution:
Lymphoid organs can be primary or secondary. Primary organs are those that form and mature lymphocytes from progenitor cells. These are Bone marrow and thymus. Secondary organs are those where interaction takes place between the lymphocytes and thus immune responses are generated. These include lymph nodes, Peyer's patches, MALT (Mucosal associated lymphoid tissue) etc.

Topic: Biology, Human Health and Diseases, NEET
Which of the following is a secondary metabolite as well as a drug?

Options:
A Concanavalin A
B Vinblastine
C Diterpenes
D Ricin

The correct answer is:
Vinblastine

Solution:
The production of secondary metabolites by plant cells and tissues has become an active field of study because of its potential as a source of valuable pharmaceutical compounds. Alkaloids such as anticancer drugs vinblastine and vincristine are examples of such compounds which are secondary metabolite as well as a drug.

Topic: Chemistry, Biomolecules, NEET
Which of the following is a secondary pollutant?

Options:
A Carbon dioxide
B Nitrogen oxides
C Peroxyacyl nitrates
D All of these

The correct answer is:
Peroxyacyl nitrates

Solution:
Secondary air pollutants are photochemically produced from primary pollutants and are thus called photochemical oxidants. Ozone, peroxyacyl nitrates, aldehydes and phenols are produced due to photochemical reactions between nitrogen oxides and unsaturated hydrocarbons.

Topic: Biology, Environmental Issues, AIIMS, AIIMS 2013
Which of the following is a secondary pollutant?

Options:
A SO2
B CO2
C CO
D O3

The correct answer is:
O3

Solution:
O3 is a secondary pollutant. It is called a "secondary" pollutant because it is produced when two primary pollutants react in sunlight and stagnant air. These two primary pollutants are nitrogen oxides (NOx) and volatile organic compounds (VOCs)

Topic: Biology, Environmental Issues, NEET, NEET 2018
Which of the following is a secondary pollutant?

Options:
A SO2
B CO2
C CO
D O3

The correct answer is:
O3

Solution:
O3 is a secondary pollutant. It is called a "secondary" pollutant because it is produced when two primary pollutants react in sunlight and stagnant air. These two primary pollutants are nitrogen oxides (NOx) and volatile organic compounds (VOCs)

Topic: Biology, Environmental Issues, NEET
Which of the following is a transparent tissue?

Options:
A Tendon
B Fibrous cartilage
C Hyaline cartilage
D All of these

The correct answer is:
Hyaline cartilage

Solution:
Hyaline cartilage is the most abundant kind of cartilage with no fibres and transparent matrix. It is found upon articular surfaces at joints of long bones from articular cartilage, coastal cartilages at the ventral ends of the ribs. It helps to from the nose, larynx, trachea, bronchi and bronchial tubes leading to the lungs.Fibrocartilage (fibrous cartilage) carries thick dense bundles of white collagen fibres in matrix. They are the strongest cartilage. They occur in joints between vertebrae and also pubic symphysis.Tendon is a very dense, strong fibrous connective tissue made of collagen fibres. Tendon connects a skeletal muscle to a bone.

Topic: Biology, Structural Organisation in Animals, JIPMER, JIPMER 2009
Which of the following is a use of potassium dichromate?

Options:
A Leather industry
B Volumetric analysis
C Preparation of azo compounds
D None of the above

The correct answer is:
Volumetric analysis

Solution:
Sodium and potassium dichromates are strong oxidising agents; the sodium salt has a greater solubility in water and is extensively used as an oxidising agent in organic chemistry. Potassium dichromate is used as a primary standard in volumetric analysis.

Topic: Chemistry, d and f Block Elements, NEET
Which of the following is a well-known sacred grove of India?

Options:
A National Zoological Park
B Indo-Burma and Himalaya
C Khasi and Jaintia Hills
D Nilgiri Biosphere Reserve

The correct answer is:
Khasi and Jaintia Hills

Solution:
In many cultures, tracts of forest were set aside, and all the trees and wildlife within were venerated and given total protection. Such sacred groves are found in Khasi and Jaintia Hills in Meghalaya, Aravalli Hills of Rajasthan, Western Ghat regions of Karnataka and Maharashtra and the Sarguja, Chanda and Bastar areas of Madhya Pradesh. In Meghalaya, the sacred groves are the last refuges for a large number of rare and threatened plants.

Topic: Biology, Biodiversity and its Conservation, NEET
Which of the following is an abundant connective tissue of body?

Options:
A Adipose tissue, beneath skin
B Areolar connective tissue, beneath skin
C Dense connective tissue, tendons
D Specialised connective tissue, blood

The correct answer is:
Areolar connective tissue, beneath skin

Solution:
Areolar connective tissue is a type of connective tissue consisting of a matrix, protein fibres (collagen and elastin) and such cells as fibroblasts, mast cells, macrophages, and fat cells.

Topic: Biology, Structural Organisation in Animals, NEET
Which of the following is an opioid drug?

Options:
A Marijuana
B Barbiturates
C Cocaine
D Morphine

The correct answer is:
Morphine

Solution:
Opium is an opioid drug and it is obtained from white poppy plant, Papaver somniferum. It affects the human body by providing relief against pain, as it is the most effective pain killers.
Morphine is another opioid drug. Morphine is obtained from the latex of poppy plant. It is a sedative and pain-killer, used to reduce pain after surgery. These are the drugs which bind to opioids receptors in the central nervous system and gastrointestinal tract. The effects of drugs on human body are:
1. The immediate effects of drug are manifested as reckless behaviour, vandalism and violence.
2. Excess does can lead to coma and death due to cerebral haemorrhage, respiratory and heart failure.

Topic: Biology, Human Health and Diseases, NEET
Which of the following is best method of germplasm conservation ?

Options:
A Herbarium
B Botanical garden
C Seed bank
D Zoological park

The correct answer is:
Seed bank

Solution:
Endangered plants may be preserved in part through seed bank or germplasm bank. The term seed bank sometimes refers to a cryogenic laboratory facility in which the seeds of certain species can be preserved for up to a century or more without losing their fertility. It can also be used to refer to a special type of arboretum where seeds are harvested and the crop is rotated. For plants that cannot be preserved in seed banks, the only other option for preserving germplasm is in vitro storage, where cuttings of plants are kept under strict conditions in glass tubes and vessels.

Topic: Biology, Biodiversity and its Conservation, AIIMS, AIIMS 2011
Which of the following is closest to the plasma membrane?

Options:
A Tonoplast
B Middle lamella
C Primary cell wall
D Secondary cell wall

The correct answer is:
Secondary cell wall

Solution:
Vacuoles are membrane bound storage organelles found in plant cells and animal cells. They are in larger size in plants compared to animal cells. The membrane of vacuole is called as tonoplast.
The cell wall found around the cells of plants contain multiple layers. The outermost thin, flexible and extensible layer is the primary cell wall layer of the plant. The thick layer sandwiched between the plasmalemma and primary cell wall is the secondary cell wall. The middle lamella connects the adjacent cell walls of the cells and is rich in pectin. It also forms the plasmodesmata.

Topic: Biology, Cell - The Unit of Life, NEET
Which of the following is considered a hot-spot of biodiversity in India?

Options:
A Aravalli hills
B western ghats
C Indo-gangetic plain
D eastern ghats

The correct answer is:
western ghats

Solution:
India hosts 4 biodiversity hotspots: the Himalayas, the Western Ghats, the Indo-Burma region and the Sundaland (Includes Nicobar group of Islands). These hotspots have numerous endemic species.

Topic: Biology, Biodiversity and its Conservation, NEET, NEET 2006
Which of the following is correc in respect of the equations
$\frac{x-1}{2}=\frac{y-2}{3}$ and $2 x+3 y=5 ?$

Options:
A Theyrepresent two lines which are parallel.
B They represent two lines which are perpendicular.
C Theyrepresent two lines which are neither parallel nor perpendicular.
D The first equation does not represent a line.

The correct answer is:
They represent two lines which are perpendicular.

Solution:
Given equation of line is
$\frac{\mathrm{x}-1}{2}=\frac{\mathrm{y}-2}{3}$
$\Rightarrow 3 x-3=2 y-4 \Rightarrow 3 x-2 y+1=0$
$\Rightarrow \mathrm{y}=\frac{3 \mathrm{x}}{2}+\frac{1}{2}$
and equation of second line is $2 \mathrm{x}+3 \mathrm{y}=5$
$\Rightarrow \mathrm{y}=\frac{-2}{3} \mathrm{x}+\frac{5}{3}$
Slope of first line, $\mathrm{m}_{1}=\frac{3}{2}$
and slope of second line, $\mathrm{m}_{2}=-\frac{2}{3}$ $\mathrm{m}_{1} \mathrm{~m}_{2}=-1$
Hence, two lines are perpendicular to each other.

Topic: Mathematics, Straight Lines, NDA, NDA 2014 (Phase 2)
Which of the following is CORRECT about growth?

Options:
A Growth is regarded as one of most fundamental and conspicuous characteristics of living being.
B Growth can be defined as an irreversible permanent increase in size of an organ or its parts or even of an individual cell.
C Generally, growth is accompanied by metabolic processes (both anabolic and catabolic), that occur at the expense of energy.
D All of the above

The correct answer is:
Growth is regarded as one of most fundamental and conspicuous characteristics of living being.

Solution:
All living organisms grow. Growth is permanent and irreversible change in size, shape, volume and dry weight. Growth can be intrinsic and extrinsic. Non-living also grow but their growth is extrinsic (surface growth due to deposition of substances) whereas living organisms exhibit intrinsic growth (internal growth), intrinsic growth results due to metabolic activity. Plants show Indeterminate growth i.e. grow throughout the life while animals grow only up to certain age. Chapter: Plant growth and Development

Topic: Biology, The Living World, NEET
Which of the following is correct order of boiling point of hydrogen halides?

Options:
A HCl
B HF
C HCl
D HI

The correct answer is:
HCl

Solution:
Correct Option is : 1
HCl

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Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is correct order of bond lengths?

Options:
A C=O
B C=C
C C=O
D N=O

The correct answer is:
C=O

Solution:
Correct Option is : 1
C=O

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Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which of the following is correct order of enthalpy of bond dissociation of isotopes of Hydrogen?

Options:
A H
B D
C H=D
D None of these

The correct answer is:
H

Solution:
Correct Option is : 1
H

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Topic: Chemistry, Hydrogen, NEET
Which of the following is correct order of enthalpy of fusion of isotopes of Hydrogen?

Options:
A D
B H
C H=D
D None of these

The correct answer is:
D

Solution:
Correct Option is : 1
D

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Topic: Chemistry, Hydrogen, NEET
Which of the following is correct order of H–X bond length of hydrogen halides?

Options:
A HI
B HCl
C HF
D HBr

The correct answer is:
HI

Solution:
Correct Option is : 1
HI

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Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is correct order of H–X bond length of hydrogen halides?

Options:
A HCl
B HI
C HCl
D HF

The correct answer is:
HF

Solution:
Correct Option is : 4
HF

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Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is correct order of melting point of hydrogen halides?

Options:
A HF
B HI
C HCl
D HCl

The correct answer is:
HCl

Solution:
Correct Option is : 3
HCl

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Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is CORRECTLY matched?

Options:
A Frog - Primary consumer
B Productivity - Kcal/m2/yr
C Tertiary consumers - Slime moulds
D Temperate ecosystem - Ocean

The correct answer is:
Productivity - Kcal/m2/yr

Solution:
Primary consumer in a food chain is a producer which uses the light energy to make food. Frog is a secondary consumer that feeds on insects in the food chain.
Slime moulds are saprophytic protists. Slime moulds are found engulfing organic matter from the dead decaying plant body.
Productivity is the rate at which energy is added into the organism in the form of biomass and measured as Kcal/m2/yr
Temperate ecosystems include the subtropics and polar circles.

Topic: Biology, Ecosystem, NEET
Which of the following is expected to have the highest value $\left(\mathrm{gm} / \mathrm{m}^2 / \mathrm{yr}\right)$ in a grassland ecosystem?

Options:
A secondary production
B tertiary production
C gross production (GP)
D net production (NP)

The correct answer is:
gross production (GP)

Solution:
Gross primary productivity is the amount of carbon fixed during photosynthesis by all producers in the ecosystem. net primary production (NPP) is the rate at which material is accumulated in excess of respiration $(\mathrm{NPP}=\mathrm{GPP}-$ respiration).
Related Theory
The amount of new biomass (weight) that is produced by meat-eating animals (carnivores) in a given period of time is called tertiary production.

Topic: Biology, Ecosystem, NEET, NEET 2004
Which of the following is expected to have the highest value (gm /m2/yr) in an ecosystem?

Options:
A Tertiary production
B Gross productivity
C Net productivity
D Secondary productivity

The correct answer is:
Gross productivity

Solution:
Gross productivity is the total quantity of biomass produced by plants per unit area per unit time. GPP is the rate of production of organic matter during photosynthesis.

Topic: Biology, Ecosystem, NEET
Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem?

Options:
A Secondary Production
B Tertiary Production
C Gross Production (GP)
D Net Production (NP)

The correct answer is:
Gross Production (GP)

Solution:
Grasslands will have highest value of gross production. Net production is obtained after subtracting the respiratory utilization from grass production. Secondary and tertiary production is related with secondary and tertiary consumers respectively.

Topic: Biology, Ecosystem, NEET