datavorous/entrance-exam-dataset huggingface dataset:
A major breakthrough in the studies of cells came with the development of electron microscope. This is because:

Options:
A the electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons
B the resolution power of the electron microscope is much higher than that of the light microscope
C the resolving power of the electron microscope 200-350 nm as compared to $0.1-0.2 \mathrm{~nm}$ for the light microscope
D electron beam can pass through thick materials, whereas light microscopy requires thin sections

The correct answer is:
the resolution power of the electron microscope is much higher than that of the light microscope

Solution:
On an average, the resolving power of a light microscope is $0.25-0.3 \mathrm{um}$, while that of an electron microscope is $2-10 Å$. The magnification range of the light microscope is 2000 4000 , while that of an electron microscope is $1,00,000-3,00,000$.
Related Theory
The resolving power of an objective lens is measured by its ability to differentiate two lines or points in an object. The greater the resolving power, the smaller the minimum distance between two lines or points that can still be distinguished. The larger the N.A., the higher the resolving power.

Topic: Biology, Cell - The Unit of Life, NEET, NEET 2006
A major characteristic of the monocot root is the presence of:

Options:
A Open vascular bundles
B Scattered vascular bundles
C Vasculature without cambium
D Cambium sandwiched between phloem and xylem along the radius

The correct answer is:
Vasculature without cambium

Solution:
Vascular cambia are found in dicots and gymnosperms but not in monocots because radial vascular bundle is present in monocot root in which cambium is not present.

Topic: Biology, Anatomy of Flowering Plants, NEET, NEET 2015 (Phase 1)
A major component of gobar gas is:

Options:
A ammonia
B methane
C ethane
D butane.

The correct answer is:
methane

Solution:
Composition of methane gas
Related Theory
Biogas is an environmentally-friendly, renewable energy source, produced when organic matter, such as food or animal waste, is broken down by microorganisms in the absence of oxygen (anaerobic digestion). Whereas, natural gas is extracted with petroleum deposits when crude oil is brought to the surface.

Topic: Biology, Microbes in Human Welfare, NEET, NEET 2004
A major limiting factor for photosynthesis in C3 plants is

Options:
A CO2
B Temperature
C Light
D Water

The correct answer is:
CO2

Solution:
For C3 plants, CO2 fixation is carried out by enzyme RUBISCO which is highly sensitive to CO2 concentration. Increases in CO2 concentration increases the rate of photosynthesis and decreases in CO2 concentration decreases the rate of photosynthesis.

Topic: Biology, Photosynthesis in Higher Plants, NEET
A major site for synthesis of lipids is

Options:
A RER
B SER
C symplast
D nucleoplasm

The correct answer is:
SER

Solution:
The Smooth Endoplasmic Reticulum (SER) is the major site for synthesis of lipids. RER is actively involved in protein synthesis and secretion. Nucleoplasm is the site for active ribosomal RNA synthesis. Symplast is the system of interconnected protoplast through, which water movement occur's.

Topic: Biology, Cell - The Unit of Life, NEET, NEET 2013 (All India)
A male human is heterozygous for autosomal genes $\mathrm{A}$ and $\mathrm{B}$ and is also hemizygous for hemophilic gene $h$. What proportion of his sperms will be $a b h$ ?

Options:
A $\frac{1}{8}$
B $\frac{1}{32}$
C $\frac{1}{16}$
D $\frac{1}{4}$.

The correct answer is:
$\frac{1}{8}$

Solution:
Genotype of male $=\mathrm{AaBbX} \mathrm{X}^{\mathrm{h}} \mathrm{Y}$
Number of gametes $=2^n$
Where $\mathrm{n}=$ no. of heterozygous alleles (genes A, B, sex chromosome)
Thus, Number of gametes $=(2)^3=8$
The gametes produced wil be $=\mathrm{abX}^{\mathrm{h}}$, $a b Y, \mathrm{ABX}^{\mathrm{h}}, \mathrm{aBY}, \mathrm{aBX}{ }^{\mathrm{h}}, \mathrm{AbY}, \mathrm{ABY}$ and $\mathrm{AbX}^{\mathrm{h}}$.
Hence, number of sperm carrying $\mathrm{abh}=1 / 8$.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2004
A male human is heterozygous for autosomal genes A and B. He is also hemizygous for haemophilic gene h. What proportion of his sperms will be abh?

Options:
A 1 8
B 1 32
C 1 16
D 1 4

The correct answer is:
1 8

Solution:
Chance of getting a = 1 2
Chance of getting b = 1 2
Chance of getting h = 1 2
Chance of getting sperms with
abh = 1 2 × 1 2 × 1 2 = 1 8

Topic: Biology, Principles of Inheritance and Variation, NEET
A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughters and 5 sons). Three of the sons suffer from the given disease but none of the daughters affected. Which of the following mode of inheritance do you suggest for this disease?

Options:
A sex-linked dominant
B sex-linked recessive
C sex-limited recessive
D autosomal dominant.

The correct answer is:
sex-linked recessive

Solution:
Since, both parents are normal and all the sons are affected. Then, Mother would be carrier of the diseased gene and father is normal. Thus, the gene is sex linked recessive.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2005
A man can swim with speed 5 m s-1 in still river while the river is also flowing with speed 10 m s-1. If the width of the river is 100 m then minimum possible drift is

Options:
A 100 m
B 0
C 1003 m
D 1002 m

The correct answer is:
1003 m

Solution:
Let the man swim with an angle Î¸ with upstream , By using the concept of relative velocity with respect to river and substituting given values,
Drift=10-5cosâ¡Î¸1005sinâ¡Î¸
Differentiate this find Î¸ at extremum & then put Î¸ value in the formula
Drift =1003 m .

Topic: Physics, Motion In Two Dimensions, NEET
A man comes to a clinic for infertility. On examination, it is found that he has a reduction in the size of the testicles, decreased sperm production and enlargement of the prostate gland. He confesses to drug abuse. Which drug would he be consuming?

Options:
A Cocaine
B Charas
C Anabolic steroids
D Heroin

The correct answer is:
Anabolic steroids

Solution:
Certain sportspersons misuse anabolic steroids to increase muscle strength and bulk and to promote aggressiveness and as a result increase athletic performance. The side-effects of the use of anabolic steroids in females include masculinisation (features like males), increased aggressiveness, mood swings, depression, abnormal menstrual cycles, excessive hair growth on the face and body, enlargement of the clitoris, deepening of the voice. In males, it includes acne, increased aggressiveness, mood swings, depression, reduction of the size of the testicles, decreased sperm production, the potential for kidney and liver dysfunction, breast enlargement, premature baldness, enlargement of the prostate gland. These effects may be permanent with prolonged use.

Topic: Biology, Human Health and Diseases, NEET
A man gets infected with a pathogen through contaminated food. He shows the following symptoms: stomach pain, sustained high fever, constipation, loss of appetite and headache. Which of the following diseases is the man suffering from?

Options:
A Cholera
B Ringworm
C Typhoid
D Filariasis

The correct answer is:
Typhoid

Solution:
Salmonella typhi is a pathogenic bacterium which causes typhoid fever in human beings. These pathogens generally enter the small intestine through food and water contaminated with them and migrate to other organs through blood. Sustained high fever (39Â° to 40Â°C), weakness, stomach pain, constipation, headache and loss of appetite are some of the common symptoms of this disease. Intestinal perforation and death may occur in severe cases. Typhoid fever could be confirmed by Widal test. A classic case in medicine, that of Mary Mallon nicknamed Typhoid Mary, is worth mentioning here. She was a cook by profession and was a typhoid carrier who continued to spread typhoid for several years through the food she prepared.

Topic: Biology, Human Health and Diseases, NEET
A man goes to a height equal to the radius of the earth from its surface. The weight of the person at that height relative to his weight on the surface of earth is

Options:
A 12
B 13
C 14
D 15

The correct answer is:
14

Solution:
At the surface of the earth, the weight of the person.
W=mg⇒mGMR2

At a height h
weight W'=mg'⇒mGM(R+h)2

∴W'W=R2(R+h)2
When h=R,W'W=R2(2R)2=14

Topic: Physics, Gravitation, NEET
A man is admitted to a hospital. He is suffering from abnormally low body temperature, loss of appetite and extreme thirst. His brain scan would probably show a tumour in the

Options:
A medulla oblongata
B pons varolii
C cerebellum
D hypothalamus

The correct answer is:
hypothalamus

Solution:
Hypothalamus is a control centre for hunger, thirst, sweating, sleep, fatigue, temperature, anger, pleasure, love, hate and satisfaction. Thus, if a man is suffering from the given abnormalities, he has a tumour in his hypothalamus.

Topic: Biology, Neural Control and Coordination, NEET
A man is running on the ground. It is known that the coefficient of friction between the man and the ground is μ. Then which of the following statements is correct

Options:
A Normal reaction between man and ground is equal to weight of man
B The direction of friction on man is in the direction of normal reaction on the man
C Direction of friction on man is opposite to the direction of motion of man
D Maximum acceleration of man can be 2μg

The correct answer is:
Normal reaction between man and ground is equal to weight of man

Solution:
When we walk, our feet are pushing ground backwards and therefore the friction opposes the pushing and acts in the opposite direction which happens to be the direction in which we are walking.

Hence we can say friction works in the direction of walking

Normal reaction N=Mg ( as per free body diagram )

Maximum acceleration amax=fmaxM=Î¼MgM=Î¼g

Topic: Physics, Laws of Motion, NEET
A man is standing between a stationary source and cliff. When he starts moving along line joining him and source, he hears 10 beats per second. The velocity of man is [frequency of source = 600 Hz, velocity of sound = 330 m s-1]

Options:
A 5.5Â m/s
B 11 m/s
C 16.5 m/s
D 2.75Â m/s

The correct answer is:
2.75 m/s

Solution:
As man is moving towards cliff, so apparent frequency heard directly towards source will be f2
f2=330-v330-0600
similarly, apparent frequency heard by observer after reflection from the cliff will be f3=330+v330-0600
Now these two frequency f2 and f3 will produce 10 beats per second therefore f3-f2=10 by solving we get v=2.75 m/s

Topic: Physics, Waves and Sound, NEET
A man is suffering from a severe disease which includes symptoms like chills, fever and cough. On close inspection, it is found his fingernails have turned blue. An x-ray of his lungs showed an accumulation of fluid in them. Which of the following pathogens is the causative agent for this disease?

Options:
A Plasmodium vivax
B Klebsiella pneumoniae
C Haemophilus influenzae
D Plasmodium ovale

The correct answer is:
Haemophilus influenzae

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

Topic: Biology, Human Health and Diseases, NEET
A man measures the period of a simple pendulum inside a stationary lift and finds it be T. If the lift accelerates downwards with an acceleration of g3 , then the period of the pendulum will be

Options:
A 23Â T
B 32 T
C TÂ 3
D T3

The correct answer is:
32 T

Solution:
When the lift is moving in a downward direction with an acceleration g3 then
geff=g-g3=23g
Since we know, the time period of a simple pendulum,
T1=2πlgeff=2π⋅l23g
T1=32⋅2π lg
Hence, T1=32T ∵T=2πlg

Topic: Physics, Oscillations, NEET
A man of 50 kg is standing at one end on a boat of length 25 m and mass 200 kg. If he starts running and reaches the other end, he has a speed 2 m s-1 with respect to the boat. The final speed of the boat is ( in m s-1)

Options:
A 25
B 23
C 85
D 83

The correct answer is:
25

Solution:
Let v be the speed of the boat with respect to the water, then from conservation of linear momentum.
-200+50v+50Ã2=50Ã0+200Ã0
250v=-100
v=-100250=-25 m s-1

Topic: Physics, Laws of Motion, NEET
A man of 50 kg is standing at one end on a boat of length 25 m and mass 200 kg. If he starts running and when he reaches the other end, he has a speed 2 m s-1 with respect to the boat. The final speed of the boat is ( in m s-1)

Options:
A 25
B 23
C 85
D 83

The correct answer is:
25

Solution:
Let v be the speed of the boat with respect to the water, then from conservation of linear momentum.
-200+50v+50×2=50×0+200×0
250v=-100
v=-100250=-25 ms-1

Topic: Physics, Laws of Motion, NEET
A man of $50 \mathrm{~kg}$ mass is standing in a gravity free space at a height of $10 \mathrm{~m}$ above the floor. He throws a stone of $0.5 \mathrm{~kg}$ mass downwards with a speed $2 \mathrm{~ms}^{-1}$. When the stone reaches the floor, the distance of the man above the floor will be

Options:
A $9.9 \mathrm{~m}$
B $10.1 \mathrm{~m}$
C $10 \mathrm{~m}$
D $20 \mathrm{~m}$

The correct answer is:
$10.1 \mathrm{~m}$

Solution:
$m r=$ constant
$$
\begin{aligned}
m_1 r_1 & =m_2 r_2 \\
r_2 & =\frac{m_1 r_1}{m_2} \\
& =\frac{0.5 \times 10}{50}=0.1
\end{aligned}
$$
The distance of the man above the floor (total height $)=10+0.1=10.1 \mathrm{~m}$.

Topic: Physics, Center of Mass Momentum and Collision, NEET, NEET 2010 (Screening)
A man of 80 kg attempts to jump from a small boat of mass 40 kg on to the shore. He can generate a relative velocity of 6 m s-1 between himself and the boat. His velocity towards the shore is

Options:
A 4 m s-1
B 8 m s-1
C 2 m s-1
D 3 m s-1

The correct answer is:
2 m s-1

Solution:
Let the velocity of boat be V opposite to the man. By momentum conservation, -40V+80(6-V)=0
∴  V=4 m s-1
∴ Velocity of the man =6-4=2 m s-1

Topic: Physics, Center of Mass Momentum and Collision, NEET
A man of blood group A marries a woman of blood group AB. Which type of progeny indicates that man is heterozygous?

Options:
A O
B A
C B
D AB

The correct answer is:
B

Solution:
If the man is homozygous for A blood group then offspring can never have a B blood group in the given cross. But if the man is heterozygous, the probability of offspring having B blood group is there. Hence the presence of the B blood group in offspring will be indicative of heterozygosity of the man. You can check this by application of punnet square.

Man Woman	IA	io

IA	IA IA	IAio

IB	IAIB	IBio

Topic: Biology, Principles of Inheritance and Variation, NEET
A man of mass 60 kg climbed down using an elevator. The elevator had an acceleration of 4 m s-2. If the acceleration due to gravity is 10 m s-2, the man's apparent weight on his way down is

Options:
A 60 N
B 240 N
C 360 N
D 840 N
E 3600 N

The correct answer is:
360 N

Solution:
The man is climbing down using the elevator, so the resultant gravity on the man will be
âµgâ²=g-a=10-4
=6 m s-2
The weight of the person, W=mgâ²
=60Ã6=360 N

Topic: Physics, Laws of Motion, NEET
A man of mass 80 kg is riding on a small cart of mass 40 kg which is rolling along a level floor at a speed of 2 m s-1. He is running on the cart so that his velocity relative to the cart is 3 m s-1 in the direction opposite to the motion of the cart. What is the speed of the centre of mass of the system

Options:
A 1.5 m s-1
B 1 m s-1
C 3 m s-1
D zero

The correct answer is:
zero

Solution:
v→cart=v→c=2i^
⇒v→m=v→mc+v→c
⇒v→m=-3i^+2i^
⇒v→m=i^
Now v→cm=80-i^+402i^80+40
v→cm=0

Topic: Physics, Center of Mass Momentum and Collision, NEET
A man of mass M stands at one end of a plank of length L which lies at rest on a frictionless surface. The man walks to the other end of the plank. If the mass of the plank is 3M, the distance that the man moves relative to the ground is

Options:
A L4
B 3L4
C 2L3
D L3

The correct answer is:
3L4

Solution:
3mx=mL-x,
⇒4mx=3L
⇒ x=L4
∴ displacement of man =L-x=L-L4=3L4

Topic: Physics, Center of Mass Momentum and Collision, NEET
A man of weight mg is standing inside a rocket which is moving with an acceleration 4g. The apparent weight of the man inside the rocket is

Options:
A Zero
B 4 mg
C 5 mg
D mg

The correct answer is:
5 mg

Solution:
Apparent weight of the man, R=mg+a
=mg+4g=5mg

Topic: Physics, Laws of Motion, NEET
A man of weight W on the surface of the earth. What is his weight at a height equal to R?

Options:
A W
B W2
C W4
D W8

The correct answer is:
W4

Solution:
Value of g at height h is given as geff=g1+hR2
WhW=mghmg
=ghg
=R2R+R2
Wh=W4

Topic: Physics, Gravitation, NEET
A man running at a speed of 5 km/h finds that the rain is falling vertically. When he stops running, he finds that the rain is falling at an angle of 60o with the horizontal. The velocity of rain with respect to running man is

Options:
A 53 km/h
B 532 km/h
C 435 km/h
D 53 km/h

The correct answer is:
53 km/h

Solution:
V r =âvelocity of rain V rm = velocity of rain with respect to man V m = velocity of man

tanâ¡30o=VmVrm
Vrm=513=53 km/h

Topic: Physics, Motion In Two Dimensions, NEET
A man runs across the rooftop of a tall building and jumps horizontally with the hope of landing on the roof of the next building, which is of a lower height than the first. If his speed is 9 m/s, the (horizontal) distance between the two buildings is 10 m, and the height difference is 9 m, what is the horizontal distance moved by the man? (take g = 10 m/s²)

Options:
A 8.94 m
B 10.00 m
C 11.12 m
D 12.06 m

The correct answer is:
12.06 m

Solution:
Correct Option is : (D)
12.06 m

Topic: Chemistry, Motion In One Dimension, NEET
A man standing on the roof of a house of height h throws one particle vertically downwards and another particle horizontally with the same velocity u. The ratio of their velocities when they reach the earth's surface will be:

Options:
A 2gh+u2 :u
B 1Â :2
C 1Â :1
D 2gh+u2 : 2gh

The correct answer is:
1 :1

Solution:
Velocity of A when it reaches the earth's surface
=u2+2hg
And velocity of B when it reaches the earth's surface
=u2+2hg
∴v1=v2

Topic: Physics, Motion In Two Dimensions, NEET
A man stands on a weighing machine kept inside a lift. Initially, the lift is ascending with the acceleration a due to which the reading is W. Now the lift descends with the same acceleration and reading is 10% of initial. Find the acceleration of lift.

Options:
A g19
B 9g11
C zero
D g

The correct answer is:
9g11

Solution:
N=mg+a
N′=mg-a
N′=10100×N
mg-a=mg+a10
10g-10a=g+a
9g=11a
⇒a=9g11

Topic: Physics, Laws of Motion, NEET
A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is :

Options:
A 2:1

B 3:1
C 3:2
D 4:3

The correct answer is:
3:1

Solution:
Let VB is the velocity of Boat
and VR is the velocity of River, then
x=VB+VRt â¦â¦.(1)
x=VB-VR2tâ¦â¦..(2)
using 1 & 2 we set VBVR=31

Topic: Physics, Motion In One Dimension, NEET
A man throws a packet from a tower directly aiming at his friend who is standing at a certain distance from the base which is same as the height of the tower. If the packet is thrown with a speed of 4 m s-1 and it hits the ground midway between the tower base & his friend than the height of the tower is g=10 m s-2

Options:
A 5 m
B 8 m
C 3.2 m
D 13 m

The correct answer is:
3.2 m

Solution:
42.t=h2â¦..(i)
& h=42t+12gt2 â¦..(ii)
From (i) and (ii)
h2=12g422
âh2=12gh422
h=16Ã210=3.2 m

Topic: Physics, Motion In Two Dimensions, NEET
A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km/h. Finding the market closed, he instantly turns and walks back home with a speed of 7.5 km/h. What is the average speed of the man over the interval of time 0 to 30 minutes?

Options:
A 2.5 km/h
B 5.0 km/h
C 6.0 km/h
D 7.5 km/h

The correct answer is:
6.0 km/h

Solution:
Correct Option is : (C)
6.0 km/h

Topic: Chemistry, Motion In One Dimension, NEET
A man wants to reach from A to the opposite corner of the square C (Fig. 4.10). The sides of the square are 100 m. A central square of 50m × 50m is filled with sand. Outside this square, he can walk at a speed 1 m/s. In the central square, he can walk only at a speed of v m/s (v < 1). What is smallest value of v for which he can reach faster via a straight path through the sand than any path in the square outside the sand?

Options:
A 0.46m/s
B 0.81m/s
C 1.11m/s
D 1.96m/s

The correct answer is:
0.81m/s

Solution:
Correct Option is : (B)
0.81m/s

Topic: Chemistry, Motion In Two Dimensions, NEET
A man wants to swim across a river of width 200 m along the shortest path. If the speed of river stream is 3 km h-1 and speed of swimmer in still water is 5 km h-1, then the time of crossing the river is

Options:
A 10 min
B 15 min
C 3 min
D 6 min

The correct answer is:
3 min

Solution:
Speed of swimmer in still water = Speed of swimmer with respect to river.
v⊥=52-32=4 km h-1
∴ t=0.24×40 min=3 min

Topic: Physics, Motion In Two Dimensions, NEET
A man weighing 60 kg is in a lift moving down with an acceleration of 1.8 m s-2. The force exerted by the floor on him is

Options:
A 588  N
B 480  N
C Zero
D 696ââN

The correct answer is:
696  N

Solution:
F=mg - a=609.8 - 1.8
=480 N

Topic: Physics, Laws of Motion, NEET
A man weighing 60 kg is standing on a trolley weighing 240 kg. The trolley is resting on frictionless horizontal rails. If the man starts walking on the trolley with a velocity of 1 m s-1, then after 4 s, his displacement relative to the ground is

Options:
A 6 m
B 4.8 m
C 3.2 m
D 2.4 m

The correct answer is:
3.2 m

Solution:
The trolley shall move backwards to conserve momentum. The backward momentum would be shared by both the trolley and the man.
Applying conservation of momentum,
60×1=(240+60)v or 60=300v
or v=60300=15 m s-1=0.2 m s-1
Speed of man w.r.t. ground,
=1-0.2 m s-1=0.8 m s-1
Displacement of man =0.8×4 m=3.2 m

Topic: Physics, Laws of Motion, NEET
A man weighing 80 kg is standing in a trolley weighing 320 kg. The trolley is resting on frictionless horizontal rails. If the man starts walking on the trolley with a speed of 1 m s-1, then after 4 s his displacement relative to the ground will be

Options:
A 5 m
B 4.8 m
C 3.2 m
D 3.0 m

The correct answer is:
3.2 m

Solution:
If the man starts walking on the trolley in the forward direction then whole system will move in backward direction with same momentum.
The momentum of man in forward direction = Momentum of the system (man+trolley) in the backward direction
⇒ 80×1=80+320×v ⇒ v=0.2 m s-1
So the velocity of the man with respect to ground 1.0-0.2=0.8 m s-1
∴ Displacement of the man with respect to ground=0.8×4=3.2 m

Topic: Physics, Laws of Motion, NEET
A man weighing 80 kg is standing in a trolley weighing 320 kg. The trolley is resting on frictionless horizontal rails. If the man starts walking on the trolley with a speed of 1 m s-1, then after 4 s, his displacement relative to the ground will be

Options:
A 5 m
B 4.8 m
C 3.2 m
D 3 m

The correct answer is:
3.2 m

Solution:
Displacement of trolley w.r.t. ground,
x=mLm+M=80×480+320=0.8 m
∴ m1x1=m2x2
⇒ 320×0.8=80x2
⇒ x2=3.2 m

Topic: Physics, Center of Mass Momentum and Collision, NEET