datavorous/entrance-exam-dataset huggingface dataset:
If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is

Options:
A 0%
B 50%
C 75%
D 100%

The correct answer is:
0%

Solution:
Colour blindness is an X-linked recessive disease and shows criss-cross inheritance. If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is 0%.
100% - carrier daughters (Phenotypically normal)
100% - Normal son

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2016 (Phase 2)
If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is

Options:
A 0%
B 50%
C 75%
D 100%

The correct answer is:
0%

Solution:
Colour blindness is an X-linked recessive disease and shows criss-cross inheritance.
100% - carrier daughters (Phenotypically normal)
100% - Normal son

Topic: Biology, Principles of Inheritance and Variation, NEET
If a colourblind woman marries a normal visioned man, their sons will be:

Options:
A all colourblind
B all normal visioned
C one-half colourblind and one-half normal
D three-fourth colourblind and one-fourth normal

The correct answer is:
all colourblind

Solution:
Colour blindness is a hereditary disease in which the gene for this disease is located on the X-chromosome. So, if a colour-blind woman marries a normal man, then it will produce all colour blind $\left(\mathrm{X}^{\mathrm{C}} \mathrm{Y}\right)$ sons. In the case of a carrier woman, the probability of a colour-blind son and a normal son is 50:50.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2006
If a colourblind women marries a normal visioned man their sons will be:

Options:
A All normal visioned
B One half normal and one half colourblind
C Three fourth colourblind and one fourth normal
D All colourblind

The correct answer is:
All colourblind

Solution:
In human colour blindness and haemophilia are X-linked disease.
All the sons are colourblind.

Topic: Biology, Principles of Inheritance and Variation, NEET
If a completely radioactive double-stranded DNA molecule undergoes two rounds of replication in a non-radioactive medium, what will be the radioactive status of the four resulting molecules?

Options:
A All four still contain radioactivity
B Three out four contain radioactivity
C Radioactivity is lost from all four
D Half the number contain no radioactivity

The correct answer is:
Half the number contain no radioactivity

Solution:
DNA replication is semiconservative, i.e., during each replication cycle, one of the parental strands is retained and a new daughter strand is obtained. Thus, only half of the parental DNA molecule is carried to the next generation.

Topic: Biology, Molecular Basis of Inheritance, NEET
If a complex absorbs green light, what color will it appear?

Options:
A Green
B Blue
C Red
D Yellow

The correct answer is:
Red

Solution:
If a complex absorbs green light, it will appear red, as the absorbed color is complementary.

Topic: Chemistry, Coordination Compounds, NEET
If a complex is named "Fe(II)," what is the oxidation number of iron in that complex?

Options:
A +2
B +1
C –2
D –1

The correct answer is:
+2

Solution:
In the name "Fe(II)," the Roman numeral II represents the oxidation number of iron, which is +2.

Topic: Chemistry, Coordination Compounds, NEET
If a conducting sphere of radius $R$ is charged. Then the electric field at a distance $r(r>R)$ from the centre of the sphere would be, $(V=$ potential on the surface of the sphere $)$

Options:
A $\frac{R V}{r^2}$
B $\frac{V}{r}$
C $\frac{r V}{R^2}$
D $\frac{R^2 V}{r^3}$

The correct answer is:
$\frac{R V}{r^2}$

Solution:
For $r>R$,
Electric field $E=\frac{K q}{r^2} \ldots$
and potential at surface of sphere $V=\frac{K q}{R}$
$\therefore$ From equation (1)
$V=\frac{E r^2}{R}$
$\Rightarrow E=\frac{R V}{r^2}$

Topic: Physics, Electrostatics, NEET, NEET 2023 (Manipur)
If a copper rod (free to move and rotate) is brought in a region of a non-uniform magnetic field, then it will align itself

Options:
A

along the direction of the magnetic field, at a location where the magnetic field is strongest

B

along the direction of the magnetic field, at a location where the magnetic field is weakest

C perpendicular to the direction of the magnetic field, at a location where the magnetic field is strongest
D perpendicular to the direction of the magnetic field, at a location where the magnetic field is weakest

The correct answer is:
perpendicular to the direction of the magnetic field, at a location where the magnetic field is weakest

Solution:
Copper is diamagnetic so the copper rod will align itself perpendicular to the direction of the magnetic field, at a location where the magnetic field is weakest

Topic: Physics, Electromagnetic Induction, NEET
If a cross between two individuals produces offsprings with 50% dominant character (A) and 50% recessive character (a), then the genotypes of parents are

Options:
A Aa×Aa
B Aa×aa
C AA×aa
D AA×Aa

The correct answer is:
Aa×aa

Solution:
A cross between homozygous recessive and heterozygous plants is called a test cross. It gives a 1:1 ratio in the monohybrid test cross and 1:1:1:1 ratio in a dihybrid test cross.

Topic: Biology, Principles of Inheritance and Variation, NEET
If a current of 0.5 ampere flows through a metallic wire for 2 hours, then how many electrons would flow through the wire?

Options:
A 3600
B 2.246 x 1022
C 10800
D 14400

The correct answer is:
2.246 x 1022

Solution:
Correct Option is : (B)
2.246 x 1022

Topic: Chemistry, Electrochemistry, NEET
If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is

Options:
A repelled by both the poles
B repelled by the north pole and attracted by the south pole
C attracted by the north pole and repelled by the south pole
D attracted by both the poles

The correct answer is:
repelled by both the poles

Solution:
Diamagnetic substance are weekly magnetised in a direction opposite to that of applied magnetic field. These are repelled in an external magnetic field ie, have a tendency to move from high to low field region.

Topic: Physics, Magnetic Properties of Matter, NEET, NEET 2009 (Screening)
If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is

Options:
A attracted by both poles
B repelled by both poles
C repelled by north pole but attracted towards south pole
D attracted by north pole but repelled by south pole

The correct answer is:
repelled by both poles

Solution:
Diamagnetic substance creates an induced magnetic field which is opposite to the applied magnetic field and thus there is repulsion on both north and south pole.

Topic: Physics, Magnetic Properties of Matter, NEET
If a diploid cell is treated with colchicine then it becomes:

Options:
A triploid
B tetraploid
C diploid
D monoploid

The correct answer is:
tetraploid

Solution:
Colchicine has the property of arresting and breaking the spindle so that a cell division without cell wall formation may be affected leading to doubling of chromosome number. So, a diploid cell will become tetraploid by chromosome doubling.
Related Theory
Colchicine is an alkaloid extracted from seed and corm of Colchicum autumnale.

Topic: Biology, Plant - Growth and Development, NEET, NEET 2002
If a disease shows its transmission from unaffected carrier female to some of the male progeny, the nature of its trait will be:

Options:
A Autosomal dominant
B Autosomal recessive
C Sex-linked dominant
D Sex-linked recessive

The correct answer is:
Sex-linked recessive

Solution:
X-linked recessive genes show criss-cross inheritance i.e. this gene is transferred from affaected male to female of next generation (carrier) and then it is transferred to male of next generation (affected) . If unaffected parents have affected progeny then this trait is often recessive. If affected parents (one or two) have unffected children then this trait is often dominant.

Topic: Biology, Principles of Inheritance and Variation, NEET
If a double stranded DNA has 20 percent of cytosine, what is the percent of Adenine in the DNA?

Options:
A 10%
B 20%
C 30%
D 40%

The correct answer is:
30%

Solution:
The Adenine content is 30%.

Topic: Biology, Molecular Basis of Inheritance, NEET
If a female has a rudimentary ovary but can provide a suitable environment for the growth of the foetus, the ART technique that can be used is

Options:
A IVF-ET
B Artificial insemination
C GIFT
D ICSI

The correct answer is:
GIFT

Solution:
GIFT (gamete intra fallopian transfer) is a suitable ART technique that can be used for the condition described above. Here, the transfer of an ovum collected from a donor into the fallopian tube of a female who has a rudimentary ovary can be done. The recipient can provide a suitable environment for fertilization and further development.

Topic: Biology, Reproductive Health, NEET
If a female individual is with small round head, furrowed tongue, partially open mouth and broad palm with characteristic palm crease. Also the physical, psychomotor and mental development is retarded. The karyotype analysis of such an individual will show :

Options:
A 47 chromosomes with $X X Y$ sex chromosomes
B 45 chromosomes with XO sex chromosomes
C 47 chromosomes with XYY sex chromosomes
D Trisomy of chromosome 21

The correct answer is:
Trisomy of chromosome 21

Solution:
The symptoms mentioned in the question are of down's syndrome which is caused by trisomy of chromosome 21 . Total chromosome number turn to be 47 . It is also called Mongoloid Idiocy.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2022 (Phase 2)
If a force is applied to an elastic wire of the material of Poisson's ratio 0.2 there is a decrease of the cross-sectional area by 1%. The percentage increase in its length is:

Options:
A 1%
B 5%
C 2.5%
D 1.5%

The correct answer is:
2.5%

Solution:
a=πr2⇒dAA=2drr⇒drr=0.5%
Poisson's ratio as σ=-dr/rdl/l⇒dll=2.5%

Topic: Physics, Mechanical Properties of Solids, NEET
If a gas at constant temperature undergoes expansion, what happens to its volume and pressure, according to Boyle's law?

Options:
A Volume increases, and pressure decreases
B Volume decreases, and pressure increases
C Volume and pressure both increase
D Volume and pressure both decrease

The correct answer is:
Volume increases, and pressure decreases

Solution:
According to Boyle's law, when a gas undergoes expansion at constant temperature, its volume increases, and its pressure decreases.

Topic: Chemistry, States of Matter, NEET
If a genetic disease is transferred from a phenotypically normal but carrier female to only some of its male progeny. The disease is

Options:
A Autosomal dominant
B Autosomal recessive
C Sex-linked dominant
D Sex-linked recessive

The correct answer is:
Sex-linked recessive

Solution:
X-linked recessive inheritance is a mode of inheritance in which a mutation in a gene on the X chromosome causes the phenotype to be always expressed in males (who are necessarily homozygous for the gene mutation because they have one X and one Y chromosome) and in females who are homozygous for the gene mutation. Females with one copy of the mutated gene are carriers. 50% probability of sons getting affected is there if mother is carrier.

Topic: Biology, Principles of Inheritance and Variation, NEET
If a given point P is in contact with ground initially and wheel of radius R is in pure rolling, then the displacement of point P when point P reaches topmost point of the sphere for the first time will be

Options:
A πR
B 2πR
C π 2 +1 R
D π 2 +4 R

The correct answer is:
π 2 +4 R

Solution:
d=(πR)2+(2R)2=π2+4R

Topic: Physics, Rotational Motion, NEET
If a homozygous tall plant is crossed with homozygous dwarf plant, the offspring will be

Options:
A

All tall plants

B

Half tall plants

C

Half dwarf plants

D

All dwarf plants

The correct answer is:

All tall plants

Solution:
Homozygous Tall × Homozygous dwarf
All of the resultant F1 progenies will be heterozygous tall plants and two of the F2 progenies will be heterozygous tall, one will be homozygous tall and the other will be homozygous dwarf.

Topic: Biology, Principles of Inheritance and Variation, NEET
If a is radius of first Bohr orbit in hydrogen atom, the radius of the third orbit is

Options:
A 3a
B 9a
C 27a
D 81a

The correct answer is:
9a

Solution:
Radius of Bohr orbit is given by
rn = Îµ0h2Ïme2n2
The quantities in the bracket are constant
â´ rnân2
The expression gives the radius of the n th Bohr orbit
r1r2= n12n22
ar2= 132
r2= 9a

Topic: Physics, Atomic Physics, NEET
If a is the length of the side of a cube, the distance between the body centered atom and one corner atom in the cube will be

Options:
A 34a
B 23a
C 43a
D 32a

The correct answer is:
32a

Solution:
As for bcc structure r=34a
So 2r=32a
As 2r represents the distance between the bcc atom and one of the corner atom so in a cube
the distance between the body centred atom and one corner atom is 32a .

Topic: Chemistry, Solid State, NEET
If a is the radius of first Bohr orbit in a hydrogen atom, the radius of the third orbit is

Options:
A 3a
B 9a
C 27a
D 81a

The correct answer is:
9a

Solution:
Radius of Bohr orbit is given by
rn = Îµ0h2Ïme2n2
The quantities in the bracket are constant
â´ rnân2
The expression gives the radius of the nth Bohr orbit
r1r2= n12n22
ar2= 132
r2= 9a

Topic: Physics, Atomic Physics, NEET
If a liquid compound decomposes at its boiling point, which method (s) can you choose for its purification. It is known that the compound is stable at low pressure, steam volatile and insoluble in water.

Options:
A Fractional distillation technique is applied to separate substances which are steam volatile and are immiscible with water
B Steam distillation technique is applied to separate substances which are steam volatile and are immiscible with water
C Simple distillation technique is applied to separate substances which are steam volatile and are immiscible with water
D Cryogenic distillation technique is applied to separate substances which are steam volatile and are immiscible with water

The correct answer is:
Steam distillation technique is applied to separate substances which are steam volatile and are immiscible with water

Solution:
Correct Option is : (B)
Steam distillation technique is applied to separate substances which are steam volatile and are immiscible with water

Topic: Chemistry, General Organic Chemistry, NEET
If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is

Options:
A excretory fluid
B coelomic fluid
C haemolymph
D slimy mucus

The correct answer is:
coelomic fluid

Solution:
The body cavity of earthworm is true coelom (schizocoel) as it is formed by the division of mesoderm. The coelom is filled with milky, alkaline coelomic fluid, which contains different types of corpuscles. Thus, if alive earthworm is prickled with a needle on its outer surface, the coelomic fluid will come out.

Topic: Biology, Structural Organisation in Animals, NEET, NEET 2009 (Screening)
If a magnet is plugged into a coil, then the magnitude of induced emf does not depend upon

Options:
A The number of turns in the coil
B The medium of the core of the coil
C The strength of the magnet
D The resistance of the coil

The correct answer is:
The resistance of the coil

Solution:
The magnitude of induced emf is given by, e=Ndϕdt=NBdsdt
Which depends upon the number of turns (N), magnetic field intensity (B) which depends upon the medium, rate of change of area dsdt which depends upon insertion speed of magnet. It is independent of resistance of the coil.

Topic: Physics, Electromagnetic Induction, NEET
If a magnet is suspended at an angle 30° to the magnet meridian, the dip of the needle makes an angle of 45° with the horizontal, the real dip is

Options:
A tan-1⁡32
B tan-1⁡3
C tan-1⁡32
D tan-1⁡23

The correct answer is:
tan-1⁡23

Solution:
tanâ¡Î´′=tanâ¡Î´cosâ¡Î¸=tanâ¡45ocosâ¡30o
tanâ¡Î´=13/2
=23
Î´=tan-1â¡23

Topic: Physics, Magnetic Properties of Matter, NEET
If a man weighs 90 kg on the surface of the earth, the height above the surface of the earth of radius R, where the weight is 30 kg is

Options:
A 0.73 R
B 3R
C R
D 2R

The correct answer is:
0.73 R

Solution:
Given, mg′mg=3090 or g′g=13
Now, g′=gR2R+h2 or g′g=R2R+h2=13
or RR+h=13 or R+h=3R
or h=3-1R=0.73R

Topic: Physics, Gravitation, NEET
If a mixture of isobutane and n-butane are present in a gas, then calculate the mass of oxygen required for complete combustion of 5 kg of this gas

Options:
A 1.8 kg
B 9 kg
C 17.9 kg
D 27 kg

The correct answer is:
17.9 kg

Solution:
Isobutane and n-butane C4H10 have same molecular formula; C4H10+132O2â4CO2+5H2O
For 58 gm of C4H10 208gm O2 is required then for 5kg of C4H10 O2=5Ã20858=17.9 kg

Topic: Chemistry, Thermodynamics (C), NEET
If a molecule has both lone pairs and bond pairs of electrons, which type of interaction will typically result in the greatest repulsion?

Options:
A Lone pair (lp) – Lone pair (lp)
B Lone pair (lp) – Bond pair (bp)
C Bond pair (bp) – Bond pair (bp)
D It depends on the specific arrangement of electron pairs.

The correct answer is:
Lone pair (lp) – Lone pair (lp)

Solution:
The greatest repulsion typically occurs between lone pair (lp) – Lone pair (lp) interactions.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
If a new planet is discovered rotating around the sun with the orbital radius double that of earth, then what will be its time period (in earth's days)?

Options:
A 1032
B 1023
C 1024
D 1043

The correct answer is:
1032

Solution:
From Kepler's third law of planetary motion
T2âR3
Given, Rp=2Re
â´ Te2Tp2=Re3Rp3
â¹ Te2Tp2=Re32Re3
â¹ Tp=22 Te
Since, Te=365 days=1 year, we have
Tp=22Ã365 days
Tp=1032.37
TP=1032 days

Topic: Physics, Gravitation, NEET
If a non-diabetic person releases glucose in the urine, it may be due to a defect in:

Options:
A Ultrafiltration
B Selective reabsorption
C Tubular secretion
D Micturition

The correct answer is:
Selective reabsorption

Solution:
If a non-diabetic person releases glucose in urine, it may be due to a defect in selective reabsorption. Selective reabsorption is the process by which the nutrients and electrolytes which are required by the body are reabsorbed from the renal tubules. If there is a defect in this process, the reabsorption of glucose will be affected. Hence, there will be excretion of glucose in urine.
Ultrafiltration is the process by which the capillaries present in the Bowman's capsule filter the fluid which enters the renal tubules.
Tubular secretion is the process by which the fluid to be excreted out is secreted back in the renal tubules after absorption of essential substances.
Micturition is the act of urination.

Topic: Biology, Excretory Products and their Elimination, NEET
If a nuclear fusion process the masses of the fusing nuclei be $m_1$ and $m_2$ and the mass of the resultant nucleus be $m_3$, then:

Options:
A $m_3=m_1+m_2$
B $m_3=\left|m_1+m_2\right|$
C $m_3 < \left(m_1+m_2\right)$
D $m_3>\left(m_1+m_2\right)$

The correct answer is:
$m_3 < \left(m_1+m_2\right)$

Solution:
Product is more stable so that is mass is less than the sum masses of reactants i.e $m_3 < \left(m_1+m_2\right)$.

Topic: Physics, Nuclear Physics, NEET, NEET 2004
If a person can jump on the earth's surface upto a height 2 m . His jump on a satellite where acceleration due to gravity is 1.96 m/s2 ,will be -

Options:
A 5 m
B 10 m
C 20Â m
D 2 m

The correct answer is:
10 m

Solution:
Work done is same in both case so
ÎU=mgh=mgâ²hâ²
âm Ã 9.8 Ã 2=m Ã 1.96 Ã hâ²
âhâ²=10m

Topic: Physics, Gravitation, NEET
If a person is running on a treadmill, the duration of his cardiac cycle will be

Options:
A greater than 0.8 sec
B less than 0.8 sec
C equal to 0.8 sec
D close to 1.0 sec

The correct answer is:
less than 0.8 sec

Solution:
The cardiac cycle involves all the events that occur during heartbeat.It involves systole and diastole. The duration of each cardiac cycle is about 0.8 sec. The average adult person has 65 to 75 heart beats/minute.
Thus 65 to 75 beats = 60 s
So 1 beat = 60/75= 0.8 sec
Thus it is seen that heart beat is inversely proportional to the duration of cardiac cycle.
During exercise, heart beat increases and thus duration decreases i.e. less than 0.8 sec.

Topic: Biology, Body Fluids and Circulation, NEET
If a person is suffering from severe male infertility due to very few sperms (oligospermia) in the ejaculate, it can be overcome by the use of _____.

Options:
A GIFT
B ZIFT
C ICSI
D Both B and C

The correct answer is:
Both B and C

Solution:
Oligospermia is a low count of sperm count per ejaculate. It can be mild, moderate and severe.Due to ART's (Assisted reproductive technologies) such a male too can overcome its infertility. Two important techniques are ZIFT and ICSI. ZIFT is a zygote intrafallopian transfer. In this technique the sperms and eggs are fertilised in test tubes and then the zygote is transferred into the uterus. This prevents wastage of sperms and increases the chances of fertilisation.The other technique suitable incase of oligospermia is ICSI (Intracytoplasmic sperm injection). In this sperms are directly injected inside the ovum to avoid wastage.

Topic: Biology, Reproductive Health, NEET
If a person obtains transformants, by inserting a recombinant DNA Within the coding sequence of beta-galactosidase, he will separate out recombinants from non-recombinants by observing

Options:
A non-recombinant colonies do not produce any colour, whereas recombinants form blue coloured colonies
B recombinant colonies do not produce any colour, whereas non-recombinants form blue coloured colonies
C recombinants and non-recombinants both produce blue coloured colonies
D no colonies are formed due to insertional inactivation

The correct answer is:
recombinant colonies do not produce any colour, whereas non-recombinants form blue coloured colonies

Solution:
Vectors in biotechnology process is a carrier for the genetic material to transfer to the desired organism's genome. Vectors are also used for making copies or clones. Origin of replication in a vector enable replication of the vector and vector supporting higher copy number is preferred. Vector having a selectable marker is preferred as it will help in identifying the transformant from non-transformants.
One of the process to detect the transformants is by adding sequence of beta-galactocidase which when expressed produces blue colour due to presence of chromogenic substance in non-recombinants and no colour in recombinants/transformants.

Topic: Biology, Biotechnology - Principles and Processes, NEET
If a person suffers punctures in his chest cavity in an accident, without any damage to the lungs, its effect could lead to

Options:
A reduced breathing rate
B rapid increase in breathing rate
C no change in respiration
D cessation of breathing

The correct answer is:
cessation of breathing

Solution:
Inhalation and Exhalation is due to pressure gradient. This is difference in the pressure which causes air to flow. During inhalation negative pressure gradient and during exhalation positive pressure gradient is formed. Thus if a person suffers from punctures inside the chest cavity, the pressure gradients will not be formed and thus breathing will stop.

Topic: Biology, Breathing and Exchange of Gases, NEET
If a person were to visit a dense forest, how would the number and variety of living organisms they see compare to if they were to make observations in a different area?

Options:
A They would see a similar number and variety
B They would see a smaller number and less variety
C They would see a greater number and more variety
D They would see a smaller number and more variety

The correct answer is:
They would see a greater number and more variety

Solution:
If a person were to visit a dense forest, they would probably see a much greater number and kinds of living organisms in it.

Topic: Biology, The Living World, NEET