datavorous/entrance-exam-dataset huggingface dataset:
A woman whose mother was colourblind and father was haemophilic, marries a colourblind haemophilic man. What is true about their daughters?

Options:
A All their daughters are colourblind and haemophilic
B They may have daughters who neither suffer from colourblindness nor from haemophilia
C They may have daughters who are colourblind or haemophilic
D Some of their daughters are colourblind, but not haemophilic

The correct answer is:
They may have daughters who are colourblind or haemophilic

Solution:
The genotype of woman: XcXh, the genotype of man: XchY, genotypes of daughters: XcXch (colourblind and haemophilic carrier) and XhXch (haemophilic and colourblind carrier), the genotype of sons: XcY (colourblind) and XhY (haemophilic).

Topic: Biology, Principles of Inheritance and Variation, NEET
A woman with 47 chromosomes due to three copies of chromosomes 21 is characterized by:

Options:
A Super femaleness
B Triploidy
C Turner's syndrome
D Down's syndrome

The correct answer is:
Down's syndrome

Solution:
Down's syndrome is caused by the presence of an extra chromosome number 21 and the with 47 chromosomes, showing trisomy.

Topic: Biology, Principles of Inheritance and Variation, NEET
A woman with normal vision, but whose father was colour blind, marries a colour blind man. Suppose that the fourth child of this couple was a boy. This boy:

Options:
A may be colourblind or may be of normal vision
B must be colour blind
C must have normal colour vision
D will be partially colour blind since he is heterozygous for the colourblind mutant allele.

The correct answer is:
may be colourblind or may be of normal vision

Solution:
The woman has normal vision but her father was colour blind so she should be the carrier to the disease as Colour blindness is an X-Linked recessive disorder.
The genotype of the woman would be: $22 \mathrm{AA}+\mathrm{XX}^{\mathrm{C}}$
The genotype of man to be colour blind should be: $22 \mathrm{AA}+\mathrm{X}^{\mathrm{C}} \mathrm{Y}$
The probability of Male child to be colour blind will $50 \%$ and the ratio of diseased to a normal male child is $1: 1$.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2005
A woman with normal vision whose mother was colourblind marries a man with normal vision. The woman is pregnant with her first child. What is the probability that the child will be a colour blind boy?

Options:
A 14
B 12
C 34
D 0

The correct answer is:
14

Solution:
The mother of the woman was color blind (XcXc). The normal vision woman will have XXc. The normal vision man will have XY. Their marriage can produce 4 possible offsprings: XX (daughter with normal vision), XcX (carrier daughter with normal vision), XY (son with normal vision) and XcY (colorblind son). Thus, there is one in four chance that the child will be a colorblind boy.

Topic: Biology, Principles of Inheritance and Variation, NEET
A women with 47 chromosomes due to three copies of chromosome 21 is characterized by:

Options:
A superfemaleness
B triploidy
C turner syndrome
D down syndrome.

The correct answer is:
down syndrome.

Solution:
Down Syndrome is a chromosomal aneuploidy, caused by an extra copy of chromosome 21 known as trisomy 21. Turner syndrome is caused by partial or complete loss (monosomy) of the second sex chromosome $(22+\mathrm{XO})$. Triploidy is the presence of an additional set of chromosomes in the cell for a total of 69 chromosomes rather than the normal 46 chromosomes per cell.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2005
A wooden block of mass m resting on a rough horizontal table is pulled by a force F as shown in the figure. If Î¼ is the coefficient of friction between block and table, its acceleration will be

Options:
A μ F â¡ cos θ mâ¡
B μ Fâ¡ sin θ mâ¡
C Fâ¡ mâ¡ cos Î¸ + Î¼ sin Î¸ - Î¼ gâ¡
D Fâ¡ mâ¡ cos θ - μ sin θ

The correct answer is:
F⁡ m⁡ cos θ + μ sin θ - μ g⁡

Solution:
Forces acting on the mass are shown in figure.
For vertical direction no motion occurs
â´ Râ¡ + Fâ¡ sin Î¸ = mg
Along horizontal
Fâ¡ cos Î¸ - fâ¡ = ma , where a is acceleration
or Fâ¡ cos Î¸ - Î¼ R = ma
Fâ¡ cos Î¸ - Î¼ mg - Fâ¡ sin Î¸ = ma
aâ¡ = Fâ¡ mâ¡ cos Î¸ + Î¼ sin Î¸ - Î¼ g

Topic: Physics, Laws of Motion, NEET
A wooden block performs SHM on a frictionless surface with frequency Ï0. The block carries a charge +Q on its surface. If now a uniform electric field E â is switched-on as shown, then the SHM of the block will be

Options:
A of the same frequency and with shifted mean position
B of the same frequency and with the same mean position
C of changed frequency and with shifted mean position
D of changed frequency and with the same mean position

The correct answer is:
of the same frequency and with shifted mean position

Solution:
Frequency or time period of SHM is dependent on variable forces. It does not depend on constant external force. Constant external force can only change the mean position. For example, in the given question, mean position is at natural length of spring in the absence of electric field. Whereas in the presence of electric field, mean position will be obtained after a compression of x0. Where x0 is given by
Kx0 = QE
Or x 0 = QE K
Correct answer is (Of the same frequency and with shifted mean position)
.

Topic: Physics, Oscillations, NEET
A wooden object floats in water kept in a beaker. The object is near a side of the beaker. Let P1, P2, P3 be the pressures at the three points A , B and C of the bottom as shown in the figure

Options:
A P1=P2=P3
B P1<P2<P3
C P1>P2>P3
D P2=P3≠P1

The correct answer is:
P1=P2=P3

Solution:
According to hydrostatic paradox A , B and C points are at same pressure.

Topic: Physics, Mechanical Properties of Fluids, NEET
A yellow coloured crystalline substance gave a colourless gas X, on reaction with fluorine, which is thermally stable and has octahedral geometry, X can be

Options:
A SF4
B S2F3
C SF6
D S2F6

The correct answer is:
SF6

Solution:
Here X is sulphur hexa fluoride
S8+24F2→8SF6(Octahedral)

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
A young infant may be feeding entirely on mother's milk, which is white in colour but the stools, which the infant passes out is quite yellowish. What is this yellow colour due to?

Options:
A Intestinal juice
B Bile pigments passed through bile juice
C Undigested milk protein casein
D Pancreatic juice poured into duodenum

The correct answer is:
Bile pigments passed through bile juice

Solution:
The stools, which the infant passes out is quite yellowish due to bile pigments passed through bile juice.

Topic: Biology, Digestion and Absorption, NEET, NEET 2009 (Screening)
A Young's double-slit experiment uses a monochromatic source. The shape of the interference fringes formed on a screen far away from the slits is

Options:
A Straight line
B Parabola
C Hyperbola
D Circle

The correct answer is:
Straight line

Solution:
If a monochromatic source is used in young’s double-slit experiment, then the interference fringes formed on the screen are hyper parabolic in shape.
Close to slits pattern will be hyperbolic & at far away distance, it is a straight line.

Topic: Physics, Wave Optics, NEET
A yo-yo is placed on a rough horizontal surface and a constant force F, which is less than its weight, pulls it vertically. Due to this

Options:
A friction force acts towards left, so it will move towards left
B friction force acts towards right, so it will move towards right
C it will move towards left, so friction force acts towards left
D it will move towards right so friction force acts towards right

The correct answer is:
friction force acts towards left, so it will move towards left

Solution:
F will provide anticlockwise torque about the centre due to which the bottommost point will tend to move towards right, so friction will act towards left. Hence it will move towards the left.

Topic: Physics, Rotational Motion, NEET
A Zener diode, having breakdown voltage equal to 15 V is used in a voltage regulator circuit shown in the figure. The current through the diode is

Options:
A 10 mA

B 15 mA
C 20 mA
D 5 mA

The correct answer is:
5 mA

Solution:
For R=1 kΩ
i1=151 mA=15 mA
For R=250 Ω
i250=20-15250=5250
=201000=20 mA
izener=20-15
=5 mA

Topic: Physics, Semiconductors, NEET
A zener diode is to be used as a voltage regulator. Identify the correct set up

Options:
A
B
C
D

The correct answer is:

Solution:
For voltage regulation Zener diode is connected in parallel to load resistance and is connected in reverse bias.

Topic: Physics, Semiconductors, NEET
A Zener of power rating 1 W is to be used as a voltage regulator. If the Zener has a breakdown of 5V and it has to regulate voltage which fluctuates between 3V and 7V, what should be the value of Rs for safe operation?

Options:
A 5 Ω
B 10 Ω
C 15 Ω
D 20 Ω

The correct answer is:
10 Ω

Solution:
Correct Option is : (B)
10 Ω

Topic: Chemistry, Semiconductors, NEET
A zymogen is an inactive substance which is made active with the help of different enzymes. Pepsinogen is secreted as a zymogen into the stomach to

Options:
A change the pH of the stomach fluids to aid digestion.
B digest complex carbohydrates.
C digest tough cellulose material.
D prevent digestion of the gastric glands.

The correct answer is:
prevent digestion of the gastric glands.

Solution:
Pepsinogen is a proenzyme, which gets converted into enzyme pepsin when it comes in contact with hydrochloric acid in the stomach. Enzyme pepsin helps in the digestion of proteins. When pepsinogen is secreted in the stomach, it is in the form of zymogen. This is to prevent the digestion of the gastric glands by direct action of pepsinogen.

Topic: Biology, Digestion and Absorption, NEET
AB and CD are two slabs. The medium between the slabs has refractive index as shown in the figure. Minimum angle of incidence (in degrees) at Q, so that the ray is totally reflected by both the slabs is

a

Options:
A 60
B 30
C 45
D 15

The correct answer is:
60

Solution:
Critical angles at 1 and 2
Î¸ c 1 = sin -1 Î¼ 1 Î¼ 2 = sin -1 1 2 = 4 5 0
Î¸ c 2 = sin -1 Î¼ 3 Î¼ 2 = sin -1 3 2 = 6 0 0
Therefore, minimum angle of incidence for total internal reflection to take place on both slabs should be 600

Topic: Physics, Ray Optics, NEET
AB crystallizes in a body centred cubic lattice with edge length ‘a’ equal to 387 pm. The distance between two oppositively charged ions in the lattice is

Options:
A 300 pm
B 335 pm
C 250 pm
D 200 pm

The correct answer is:
335 pm

Solution:
For BCC
r++r-=3a2
r++r-=3×3872pm=335.14pm≈335pm

Topic: Chemistry, Solid State, NEET
AB is a resistance less conducting rod which forms a diameter of a conducting ring of radius r rotating in a uniform magnetic field B as shown in the diagram. The resistors R 1 and R 2 do not rotate. Then the current through the resistor R 1 is

Options:
A B Ï r 2 2 R 1
B B ω r 2 2 R 2
C B ω r 2 2 R 1 R 2 R 1 + R 2
D B ω r 2 2 R 1 + R 2

The correct answer is:
B ω r 2 2 R 1

Solution:
The equivalent diagram is

The induced emf across the centre and any point on the
circumference is
e â = 1 2 B Ï â 2 = B Ï r 2 2
â´ Current through R 1 = B Ï r 2 2 R 1

Topic: Physics, Electromagnetic Induction, NEET
ABA is involved in

Options:
A Shoot elongation
B Increased cell division
C Dormancy of seed
D Root elongation

The correct answer is:
Dormancy of seed

Solution:
Abscisic acid (ABA) is a growth inhibitor, which is involved in seed dormancy. Dormant seeds germinate when ABA is overcome by gibberellins. ABA cause dormancy in axillary buds and acts as a Stress hormone in adverse environmental conditions.

Topic: Biology, Plant - Growth and Development, NEET
Abdominal ganglion in cockroach is not found in this segment,

Options:
A 2 and 3
B 4
C 5
D 6

The correct answer is:
5

Solution:
In cockroach abdominal ganglia are present in 2,3,4,6 and 7 segments and are absent in 5, 8, 9 and 10 segments. The largest abdominal ganglion is in 6th and 7th abdominal segment.

Topic: Biology, Structural Organisation in Animals, NEET
Abiogenesis or spontaneous generation means:

Options:
A Origin of life from living organisms
B Origin of life from non-living organisms
C Origin of viruses and microbes
D Origin of life from outer space

The correct answer is:
Origin of life from non-living organisms

Solution:
There were many theories to explain the origin of life. The theories are theories of special creation. theories of biogenesis, Abiogenesis, chemical evolution. panspermia, catastrophism etc. Abiogenesis is also known as theory of spontaneous generation i.e. origin of living organisms from nonliving organisms. This theory was discarded by Redi and pasteur later on.

Topic: Biology, Evolution, NEET
ABO blood group system is due to

Options:
A Multifactor inheritance
B Incomplete dominance
C Multiple allelism
D Epistasis

The correct answer is:
Multiple allelism

Solution:
A gene may have more than two alternative forms occupying the same locus on a chromosome such alleles are known as multiple alleles and the phenomenon is turned as multiple allelism. ABO blood group has 3 alleles IO, IA, and IB.

Topic: Biology, Principles of Inheritance and Variation, NEET
$\quad$ ABO blood groups in humans are controlled by the gene I. It has three alleles $-\mathrm{I}^{\mathrm{A}}, \mathrm{I}^{\mathrm{B}}$ and $\mathrm{i}$. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?

Options:
A Three
B One
C Four
D Two

The correct answer is:
Four

Solution:
In ABO blood group system, inheritance of grouping is controlled by a single autosomal gene on chomosome 9 with three major alleles $\mathrm{A}, \mathrm{B}$ and $\mathrm{O}\left(\mathrm{I}^{\mathrm{A}}, \mathrm{I}^{\mathrm{B}}\right.$ and $\left.\mathrm{I}^{\mathrm{O}}\right)$. The $\mathrm{ABO}$ blood group system has at least 6 genotypes. On the basis of presence or absence of antigens and antibodies, four blood groups (phenotypes) have been differentiated-A, B, AB and $O$ blood groups.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2010 (Screening)
ABO blood groups in humans are controlled by the gene I. It has three alleles â I A â,â I B and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?

Options:
A

Two

B

Three

C

One

D

Four

The correct answer is:

Four

Solution:
The three alleles in ABO blood groups in humans can produce six different genotypes and four different phenotypes.
Genotypes : Phenotypes
IAIA, IAi - Blood group A
IBIB, IBi - Blood group B
IAIB - Blood group AB
ii - Blood group O

Topic: Biology, Principles of Inheritance and Variation, NEET
Abortions are much riskier

Options:
A before second trimester
B after conception
C at second trimester
D after gastrulation

The correct answer is:
at second trimester

Solution:
MTP is medical termination of pregnancy, done purposely or intentionally. It is also known as induced abortion. In India, this act was not accepted earlier. But it got accepted in the year 1971. It is performed to get rid of unwanted pregnancies due to unprotected sex or rapes. There are certain laws to be followed for the same though. These are considered safe i.e. without any danger to the female if these are performed during first trimester i.e. before 12 weeks or three months of pregnancy and this requires consent from a medical practitioner.

Topic: Biology, Reproductive Health, NEET
Abortions could happen spontaneously too.

Options:
A True
B False
C Maybe
D Cannot be defined.

The correct answer is:
True

Solution:
Abortions could happen spontaneously too.

Topic: Biology, Reproductive Health, NEET
About 5% of the power of 100 W light bulb is converted to visible radiation. What is the average intensity of visible radiation at a distance of 10 m? Assume that the radiation is emitted isotropically and neglect reflection.

Options:
A 4Ã10-3 W m-2

B 5Ã10-3 W m-2
C 6×10-3 W m-2

D 7×10-3 W m-2

The correct answer is:
4Ã10-3 W m-2

Solution:
Total power = 100 W
Visible radiation power = 5% of total power
=5100×100=5 W
At a distance of 10 m, the energy distributed in the form of sphere Area of sphere = 4π (radius)2
The intensity of visible radiation
= Power Area =54×3·14102=4×10-3 W m-2

Topic: Physics, Electromagnetic Waves, NEET
About 5% of the power of a 100 W light bulb is converted to visible radiation. The average intensity of visible radiation at a distance of 1 m from the bulb:

Options:
A 0.4 W m-2
B 0.5 W m-2
C 0.6 W m-2
D 0.8 W m-2

The correct answer is:
0.4 W m-2

Solution:
Visible power = 5 W
∴ Average intensity of radiation at 1 m
=power4πr2=54×π×1=0.4Wm-2

Topic: Physics, Wave Optics, NEET
About $70 \%$ of total global carbon is found in

Options:
A grasslands
B agro-ecosystems
C oceans
D forests

The correct answer is:
oceans

Solution:
The atmosphere is the source of carbon dioxide, which is utilized by plants in photosynthesis reduced to form carbon compounds. The total mass of carbon currently in the atmosphere is about $7 \times 10^{17} \mathrm{~g}$, ie, 700000 million tonnes. Oceans regulate the $\mathrm{CO}_2$ content in the atmosphere and thus play a very important role. Sea water contains 50 times more $\mathrm{CO}_2$ than air, ie, about $70 \%$ of total global carbon is found in oceans. This is in the form of carbonates and bicarbonates.

Topic: Biology, Ecosystem, NEET, NEET 2008 (Screening)
About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen. nitrogen. oxygen and:

Options:
A sulphur and magnesium
B magnesium and sodium
C calcium and phosphorus
D phosphorus and sulphur.

The correct answer is:
phosphorus and sulphur.

Solution:
Living organisms requires 6 elements in relatively large amounts. Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus and Sulphur. These elements contribute to the structural organization of living organisms. Phosphorus is important constituent of nucleic acids, sulphur and nitrogen constituent of amino acids. Carbon, hydrogen, oxygen are frame-work element. Nitrogen forms DNA base pairs.
Related Theory
Plants obtained their supplies of material from air, water, and soil. Animais oblained these by eating plants and drinking water. All are present in rocks and are released by erosion and weathering into soils, rivers. lakes and oceans. Some such as $\mathrm{N}, \mathrm{O}$, and $C$ are also present in the atmosphere. The movement of the nutrient element through the biosphere is called the biogeochemical cycle. e.g., Carbon, nitrogen, sulphur, phosphorus, oxygen and water cycles.

Topic: Biology, Mineral Nutrition, NEET, NEET 2007
About 200 mya, a fish-like reptile named ________ was evolved as the reptiles from the land went back into the water.

Options:
A Icthyophis
B Stegosaurs
C Ichthyosaurs
D Triceratops

The correct answer is:
Ichthyosaurs

Solution:
Ichthyosaurs are large extinct fish like reptiles. (Ichthyo means fish and saur means lizard like). These evolved in the Mesozoic era. These were formed as reptiles but went back into water.

Topic: Biology, Evolution, NEET
About H2SO4 which of the following statement is incorrect?

Options:
A It acts as a reducing agent
B It acts as an oxidizing agent
C It acts as dehydrating agent
D It is highly viscous

The correct answer is:
It acts as a reducing agent

Solution:
null

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
About how much of solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis?

Options:
A 1%
B 5%
C 20%
D 50%

The correct answer is:
1%

Solution:
Plants require solar energy to make food through the process of photosynthesis. Out of the total solar radiation, only about 50 percent is photosynthetically active radiation (PAR). Plants only capture about 2-5% of PAR for synthesis but only 1-5 percent of total sunlight is actually utilised by plants to make food through photosynthesis.

Topic: Biology, Photosynthesis in Higher Plants, NEET
About _____ of all insects are known to feed on green plants.

Options:
A half
B one-fourth
C one-third
D two-third

The correct answer is:
one-fourth

Solution:
Phytophagous (herbivore predator) are those insects which fees on trees. These group comprise nearly 25% of the total insect population. They consume the plant sap. Plants have developed various ways to overcome the predation of phytophagus as plants cannot run away. Thorns, chemicals are ways to keep insect attack at bay.

Topic: Biology, Organisms and Populations, NEET
About (X) recombinant therapeutics have been approved for human use the world over out of which (Y) are presently being marketed in India

Options:
A X-25, Y-12
B X-30, Y-12
C X-25, Y-10
D X-30 , Y-10

The correct answer is:
X-30, Y-12

Solution:
Recombinant therapeutics include the medicines manufactured using recombinant proteins. These proteins are produced by the recombinant organisms which is possible due to recombinant DNA technology. At present, about thirty recombinant therapeutics have been approved for the use of human around the world. Presently, In India, twelve of these recombinant therapeutics are being marketed. Also, these therapeutics do not induce unwanted immunological response as observed in some non-human sources.

Topic: Biology, Biotechnology and Its Applications, NEET
About ____X____ volume of blood is filtered by the kidney per minute during urine formation to form ____Y____ amount of filtrate in the Bowman's capsule per minute.

Select the correct option for X and Y from the following.

Options:
A

X	Y
125 ml	100-1200 ml

B

X	Y
1100-1200 ml	125 ml

C

X	Y
1100-1200 ml	180 litre

D

X	Y
Both (B) and C are correct	100-1200 ml

The correct answer is:

X	Y
1100-1200 ml	125 ml

Solution:
On an average, 1100-1200 ml of blood is filtered by the kidneys per minute to form approximately 125 ml of filtrate per minute or 180 litre of filtrate per day in the Bowman's capsule.
The filtrate fraction during this process is about 18-25%

Topic: Biology, Excretory Products and their Elimination, NEET
Above curie temperature:

Options:
A a paramagnetic substance becomes ferromagnetic
B a ferromagnetic substance becomes paramagnetic
C a paramagnetic substance becomes diamagnetic
D a diamagnetic substance becomes paramagnetic

The correct answer is:
a ferromagnetic substance becomes paramagnetic

Solution:
Curie temperature \(\left(\mathrm{T}_{\mathrm{C}}\right)\) is the temperature at which certain materials lose their permanent magnetic properties, to be replaced by induced magnetism.
Above the Curie temperature, the material is paramagnetic, as the atoms lose their ordered magnetic moments when the material undergoes a phase transition.
The ordered magnetic moments change and become disordered at the Curie temperature. Higher temperatures make magnets weaker, as spontaneous magnetism only occurs below the Curie temperature.

Topic: Physics, Magnetic Properties of Matter, NEET, NEET 2006
Above Curie's temperature,

Options:
A a paramagnetic substance becomes diamagnetic
B a diamagnetic substance becomes paramagnetic
C a paramagnetic substance becomes ferromagnetic
D a ferromagnetic substance becomes paramagnetic

The correct answer is:
a ferromagnetic substance becomes paramagnetic

Solution:
Above Curie's temperature, a ferromagnetic substance becomes paramagnetic.

Topic: Physics, Magnetic Properties of Matter, NEET
Above plot represents the variation of molar conductance against C (where C = molar concentration of the electrolyte). Select the correct option among following

Options:
A Both I and II are for strong electrolyte
B Both I and II are for weak electrolyte
C I is for strong electrolyte and II for weak electrolyte
D I is for weak electrolyte and II for strong electrolyte

The correct answer is:
I is for strong electrolyte and II for weak electrolyte

Solution:
Here I is for strong electrolyte and II for weak electrolyte as Linear plot corresponds to strong electrolyte while the exponential curve corresponds to weak electrolyte.

Topic: Chemistry, Electrochemistry, NEET
Abscisic acid is also known as ___ hormone.

Options:
A Stress
B Happy
C Relax
D None of the above

The correct answer is:
Stress

Solution:
Abscisic acid is also known as stress hormone

Topic: Biology, Plant - Growth and Development, NEET