datavorous/entrance-exam-dataset huggingface dataset:
Number of meiotic divisions required to produce 200-400 seeds of pea would be

Options:
A 200-400
B 400-800
C 300-600
D 250-500

The correct answer is:
250-500

Solution:
200 seeds of a pea would be produced from 200 pollen grains and 200 embryo sac. 200 pollen grains and 200 embryo sac. 200 pollen grains will be formed by 50 microspore mother cells while 200 embryo sac will be formed by 200 megaspore mother cells (because 3 will degenerate) so 250-500.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Number of microsporangia in a dithecous anther is

Options:
A Only one
B Two
C Four
D Many

The correct answer is:
Four

Solution:
The anther is the part of the stamen where pollen grains are produced. It has the microsporangia and has multiple layers surrounding the pollen sac. The typical angiosperm anther is bilobed and each lobe having two theca or chambers. Such thecal pattern is called dithecous. Microsporangium is the structure found in anther where pollen grains are produced which is surrounded by multiple layers of tissue. Each lobe of is the pollen sac is the site for production of pollen grain. Each lobe of a dithecous anther consists of two microsporangia.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Number of moles of K2Cr2O7 that can be reduced by 1 mol of Sn2+ ions is

Options:
A 13
B 32
C 56
D 65

The correct answer is:
13

Solution:
Cr2O72-+14H++3Sn2+â2Cr3++7H2O+3Sn4+
As 1 mole of K2Cr2O7 is oxidising 3 moles of Sn2+
So 1 mol Sn2+â¡13 mol of Cr2O72- .

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
Number of moles of $\mathrm{MnO}_4^{-}$required to oxidise one mole of ferrous oxalate completely in acidic medium will be

Options:
A 0.6 mole
B 0.4 mole
C 7.5 moles
D 0.2 mole

The correct answer is:
0.6 mole

Solution:
Key Idea :
$\mathrm{MnO}_4^{-}+5 \mathrm{C}_2 \mathrm{O}_4^{2-}+24 \mathrm{H}^{+} \longrightarrow 3 \mathrm{Mn}^{2+}+10 \mathrm{CO}_2+12 \mathrm{H}_2 \mathrm{O}$
$\because$ Number of moles of $\mathrm{MnO}_4^{-}$required to oxidise 5 moles of $\mathrm{C}_2 \mathrm{O}_4^{2-}=3$
$\therefore$ Number of moles of $\mathrm{MnO}_4^{-}$required to oxidise 1 mole of $\mathrm{C}_2 \mathrm{O}_4^{2-}=\frac{3}{5} =0.6 \mathrm{~mol}$

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET, NEET 2008 (Screening)
Number of nodes in above plot is

Options:
A 1
B 2
C 3
D 4

The correct answer is:
1

Solution:
There is only one node in the plot. Node is point at which radial probability function changes from âve to +ve.

Topic: Chemistry, Structure of Atom, NEET
Number of nuclei of a radioactive substance at time t=0 are 1000 and 900 at time t=2 s. Then number of nuclei at time t=4 s will be

Options:
A 800
B 810
C 790
D 700

The correct answer is:
810

Solution:
In first 2 s, number of nucleons present is 900 out of 1000,
This means Percentage number of nuclei left =9001000×100=90%, i.e., 90% nuclei are left behind.
Therefore in next 2 s, 90% of 900 nuclei will be left.
Number of nuclei left =90100×900=810, i.e., 810 nuclei will be left.

Topic: Physics, Nuclear Physics, NEET
Number of oxygen atoms required for oxidation of 2 NADH2 molecule in ETS is

Options:
A 1
B 2
C 3
D 4

The correct answer is:
2

Solution:
For oxidation of one NADH2 molecule, one oxygen atom is required in ETS; thus, for 2 NADH2 molecules, 2 oxygen atoms are required. Oxygen functions as terminal electron acceptor during aerobic respiration.

Topic: Biology, Respiration in Plants, NEET
Number of particles, given by n=-Dn2-n1x2-x1, is crossing a unit area perpendicular to x-axis in unit time, where n1 and n2 are number of particles per unit volume for the value of x meant to x2 and x1 . Find dimensions of D, called as diffusion constant.

Options:
A M0 LT2
B M0 L2 T-4
C M0 LT-3
D M0 L2 T-1

The correct answer is:
M0 L2 T-1

Solution:
Given, number of particle passing from unit area in unit time =n
=Number of particleA×t=M0 L0 T0L2 T=L-2 T-1
n1=n2=Number of particle in unit volume=L-3
Now, from the given formula D=n x2-x1n2-n1
=L-2 T-1 LL-3
=L2 T-1

Topic: Physics, Units and Dimensions, NEET
Number of photons emitted by 100 W sodium lamp in one second is (Given Î»=5.89Ã10-9m;h=6.625Ã10-34J s)

Options:
A 2.9×1020
B 1.9×1018
C 2.9×1018
D 1.9×1020

The correct answer is:
2.9×1018

Solution:
âµ Power=N thCÎ»
â Nt=pÎ»hC
=1005.89Ã10-96.625Ã10-34Ã3Ã108
=5.896.625Ã3Ã102-9+34-8
=0.296Ã1019=2.96Ã1018

Topic: Physics, Atomic Physics, NEET
Number of photons emitted per second by a radio transmitter that operates at a frequency of 880 kHz and a power of 10 kW is

Options:
A 1.72×1031
B 1.327×1025
C 1.327×1037
D 1.327×1045

The correct answer is:
1.72×1031

Solution:
Number of photons emitted per sec,
n=PowerEnergy of photon=Phv
=100006.6×10-34×880×103=1.72×1031

Topic: Physics, Dual Nature of Matter, NEET
Number of stereoisomers of the given compound
is

Options:
A 2
B 4
C 3
D 6

The correct answer is:
4

Solution:
It has one chiral centre and one double bond. Hence stereoisomers are four.

It has two geometrical and two optical isomers.
Hint :As it fulfill conditions to show both geometrical and optical isomerism.

Topic: Chemistry, General Organic Chemistry, NEET
Number of structural isomers of C4H10O that are ethers are

Options:
A 1
B 2
C 3
D 4

The correct answer is:
3

Solution:
C4H10O has following three ether isomers

Topic: Chemistry, General Organic Chemistry, NEET
Number of waves produced by the complete revolution of electron in n th orbit is

Options:
A n
B n2
C (n + 1)
D (2n + 1)

The correct answer is:
n

Solution:
Number of waves =2πrλ=2πrh/mv
=2πh×mvr
=2πh×nh2π=n

Topic: Chemistry, Structure of Atom, NEET
Nylon is an example of

Options:
A polyster
B polysaccharide
C polyamide
D polythene

The correct answer is:
polyamide

Solution:
The general structure of any nylon polymer is
Because of the presence of amide linkage, nylon belongs to polyamides.

Topic: Chemistry, Polymers, NEET, NEET 2013 (All India)
Nylon is an example of

Options:
A Polysaccharide
B Polyamide
C Polythene
D Polyester

The correct answer is:
Polyamide

Solution:
Nylon is a polyamide. For example Nylon 6,6 is comprised of two monomers, Hexamethylenediamine, and adipic acid,each providing six carbon atoms.

Nylon 6, 6

Topic: Chemistry, Polymers, NEET
Nylon-6,6 is not a

Options:
A Condensation polymer
B Polyamide
C Both (Condensation polymer) and (Polyamide).
D None of the above

The correct answer is:
None of the above

Solution:
Nylon-66 is polyamide fibre which is manufactured by the condensation polymerization of adipic acid and hexamethylenediamine.
- C O || - CH 2 4 - C O || - NH - CH 2 6 - NH Nylon-6,6

Topic: Chemistry, Biomolecules, NEET
$O A B C$ is a unit square where $O$ is the origin and $B=(1,1)$. The curves $y^2=x$ and $x^2=y$ divide the area of the square into three parts $O A B O, O B O$ and $O B C O$. If $a_1, a_2, a_3$ are the areas (in sq units) of these parts respectively, then $a_1+2 a_2+3 a_3=$

Options:
A 1
B 2
C 6
D 64

The correct answer is:
2

Solution:
Now, $\begin{aligned} a_2 & =\int_0^1\left(\sqrt{x}-x^2\right) d x \\ & =\left[\frac{2}{3} x^{3 / 2}-\frac{x^3}{3}\right]_0^1=\frac{2}{3}-\frac{1}{3}=\frac{1}{3}\end{aligned}$
So, $\quad a_1+a_3+\frac{1}{3}=1$
From Eqs. (ii) and (iii),
$$
a_1=a_3=\frac{1}{3}=a_2
$$
So, $a_1+2 a_2+3 a_3=\frac{1}{3}+\frac{2}{3}+\frac{3}{3}=2$

Topic: Mathematics, Area Under Curves, AP EAMCET, AP EAMCET 2018 (22 Apr Shift 2)
'O' group mother with 'O' group child abuses 'AB' group man for fathership of child. Select the statement that is true regarding this?

Options:
A The claim is correct
B Father is true but mother is not
C Both parent are false
D Mother is true but the father's claim is wrong

The correct answer is:
Mother is true but the father's claim is wrong

Solution:
In ABO blood group system is an example of multiple allelism. In which 3 alleles are present as A, B, and O. A and B alleles are dominant while allele O is recessive. Blood group AB can be expressed only in heterozygous condition while blood O is expressed only in homozygous condition. So, If an offspring has an O blood group, then in his parents blood group AB is not possible.

Topic: Biology, Body Fluids and Circulation, NEET
o -nitrophenol is more volatile than para-nitrophenol due to -

Options:
A intramolecular H -bonding in o -nitrophenol and intermolecular H -bonding in p -nitrophenol
B intermolecular H -bonding in o -nitrophenol and intramolecular H -bonding in p -nitrophenol
C more stronger intramolecular H -bonding in o -nitrophenol as compared to p -nitrophenol
D more stronger intermolecular H -bonding in o -nitrophenol as compared to p -nitrophenol

The correct answer is:
intramolecular H -bonding in o -nitrophenol and intermolecular H -bonding in p -nitrophenol

Solution:
Intramolecular H -bond intermolecular H -bond and steam volatile and boiling pt . is higher.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
OABC is a current-carrying square loop. An electron is projected from the centre of the loop along with its diagonal AC as shown. The unit vector in the direction of initial acceleration is

Options:
A k &Hat;
B - i ^ + j ^ 2
C - k &Hat;
D i &Hat; + j &Hat; 2

The correct answer is:
- i ^ + j ^ 2

Solution:
F → = - e V → × B →
Force will be along BO, or unit vector = - ( i ^ + j ^ ) 2

Topic: Physics, Magnetic Effects of Current, NEET
Obligatory water reabsorption takes place at

Options:
A PCT
B DCT
C Collecting duct
D Both A and B

The correct answer is:
PCT

Solution:
The nephron is the structural and functional unit of kidneys. It consists of the Malpighian corpuscle and renal tubule. Malpighian corpuscle consists of Bowman's capsule with glomerulus in it. The renal tubule consists of PCT, DCT and Henle's Loop. Nephrons play an important role in urine formation. It includes Ultrafiltration, Tubular Reabsorption and Tubular secretion. The entire renal tubule is responsible for tubular reabsorption. The obligatory reabsorption of water and solutes takes place through PCT and descending limb of Henle's loop. The facultative water reabsorption takes place in the late distal convoluted tubule and collecting duct under the control of antidiuretic hormone (ADH).

Topic: Biology, Excretory Products and their Elimination, NEET
Observation of "Rhumann's purple" is a confirmatory test for the presence of:

Options:
A Starch
B Reducing sugar
C Protein
D Cupric ion

The correct answer is:
Protein

Solution:
Rhumann's putple is ninhydrin.

Topic: Chemistry, Biomolecules, NEET
Observe and identify the given structure.

Options:
A Brown-algae
B Blue-algae
C Red-algae
D Green-algae

The correct answer is:
Blue-algae

Solution:
Blue alga is a cyanobacterium embedded with a cell membrane, cell wall, and a gelatinous coat. In the cytoplasm, there are layers of phycobilisomes, photosynthetic lamellae, ribosomes, protein granules, and circular DNA molecules.

Topic: Biology, Plant Kingdom, NEET
Observe figures and choose the correct option.

Options:
A A- showing epigynous, inferior ovary
B B- showing hypogynous, superior ovary
C C- showing epigynous, half superior ovary
D B- showing hypogynous, inferior ovary

The correct answer is:
B- showing hypogynous, superior ovary

Solution:
There are 3 types of flowers depending on the position of the ovary with respect to other 3 whorls; they are:

1	Hypogynous flowers	Other whorls are situated below gynoecium.

2	Perigynous flowers	Other whorls are situated at the rim of thalamus almost at the same level of gynoecium.

3	Epigynous flowers	Other whorls are situated above gynoecium. Ovary is completely enclosed by thalamus.

Topic: Biology, Morphology of Flowering Plants, NEET
Observe given figure and identify with name and labelled A and B .

Options:
A Anabaena; A- Akinete; B- Heterocyst
B Nostoc; A-Heterocyst; B- Mucilaginous sheath
C Nostoc; A- Akinete; B- Vegetative cells
D Anabaena; A- Heterocyst; B- Mucilaginous sheath.

The correct answer is:
Nostoc; A-Heterocyst; B- Mucilaginous sheath

Solution:
Nostoc, the genus of blue-green algae with cells arranged in beadlike chains that are grouped together in a gelatinous mass. Reproduction is by fragmentation. A special thick-walled cell has the ability to withstand desiccation for long periods of time. Like most blue-green algae, Nostoc contains two pigments, blue phycocyanin and red phycoerythrin, as well as chlorophyll, and has the ability to fix nitrogen in specialized cells called heterocysts.

Topic: Biology, Biological Classification, NEET
Observe the action potential and state the correct events that occur in Phase I and Phase II.

Options:
A Phase I: Sodium channels open causing movement of sodium ions from the extracellular fluid to the axoplasm. Phase II: Potassium channels open causing movement of potassium ions from the extracellular fluid to the axoplasm.
B Phase I: Sodium channels open causing movement of sodium ions from the extracellular fluid to the axoplasm. Phase II: Potassium channels open causing movement of potassium ions from the axoplasm to the extracellular fluid.
C Phase I: Sodium channels open causing movement of sodium ions from the axoplasm to the extracellular fluid. Phase II: Potassium channels open causing movement of potassium ions from the extracellular fluid to the axoplasm.
D Phase I: Sodium channels open causing movement of sodium ions from the axoplasm to the extracellular fluid. Phase II: Potassium channels open causing movement of potassium ions from the axoplasm to the extracellular fluid.

The correct answer is:
Phase I: Sodium channels open causing movement of sodium ions from the extracellular fluid to the axoplasm. Phase II: Potassium channels open causing movement of potassium ions from the axoplasm to the extracellular fluid.

Solution:
Phase I is depolarization. When a stimulus greater than the threshold stimulus is applied at a point in the axon, the sodium channels open causing movement of sodium ions from the extracellular fluid to the axoplasm. Due to this, the membrane potential rises from -70 mV to + 30 mV.
Phase II is repolarization. After depolarization is over, the potassium channels open causing movement of potassium ions from the axoplasm to the extracellular fluid. Due to this, the membrane potential falls from +30 mV to - 70 mV.

Topic: Biology, Neural Control and Coordination, NEET
Observe the below diagram. Identify the option suggesting the correct functions of A, B and C.

Options:
A A: Helps in formation of vegetative cells and can regenerate into new individual by fragmentation, B: Helps in attachment to the substratum, C: Produces female gametes for sexual reproduction
B A: Helps in formation of vegetative cells and can regenerate into new individual by fragmentation, B: Produces female gametes for sexual reproduction, C: Helps in attachment to the substratum
C A: Produces female gametes for sexual reproduction, B: Help in formation of vegetative cells and can regenerate into new individual by fragmentation, C: Helps in attachment to the substratum
D A: Produces female gametes for sexual reproduction, B: Helps in attachment to the substratum, C: Help in formation of vegetative cells and can regenerate into new individual by fragmentation

The correct answer is:
A: Produces female gametes for sexual reproduction, B: Help in formation of vegetative cells and can regenerate into new individual by fragmentation, C: Helps in attachment to the substratum

Solution:
The given diagram is of female thallus of Marchantia.
A: Archegoniophore: Female branch containing female sex organ for production of female gamete and receiving the male gamete for sexual reproduction.
B: Gemma cups are structures which contain vegetative cells in them. These cells help the liverworts reproduce by vegetative propagation by fragmentation.
C: Rhizoids are root-like unicellular structures in liverworts which help in attachment to the substratum and at the same time help absorb water and minerals.

Topic: Biology, Plant Kingdom, NEET
Observe the below diagram. Identify the option suggesting the correct functions of A,B and C.

Options:
A A- Helps in attachment to the substratum, B- Stalk for supporting the body of brown algae, C- Leaf-like Photosynthetic organ for producing food
B A- Stalk for supporting the body of brown algae, B- Leaf-like Photosynthetic organ for producing food, C- Helps in attachment to the substratum
C A- Leaf-like Photosynthetic organ for producing food, B- Stalk for supporting the body of brown algae, C- The holdfast helps in attachment to the substratum
D A- Leaf-like Photosynthetic organ for producing food, B- Helps in attachment to the substratum, C- Stalk for supporting the body of brown algae

The correct answer is:
A- Leaf-like Photosynthetic organ for producing food, B- Stalk for supporting the body of brown algae, C- The holdfast helps in attachment to the substratum

Solution:
The given diagram is of Laminaria which is a brown alga.
A- The frond is a leaf-like organ which is photosynthetic in nature. It also contains air cavities for exchange of gases. B- The stipe is a stalk which supports the frond. C- The holdfast at the base helps in attachment of the algal body to a substratum.

Topic: Biology, Plant Kingdom, NEET
Observe the diagram and choose the correct answer.

Options:
A 'A' undergoes splitting at PSI and e- are transported through iron and copper-containing carriers.
B x' and y' are formed on the stroma side of the thylakoid membrane, e- are transported through iron and copper-containing carriers and transport of H+ through photosystems causes transfer of e- across the thylakoid membrane.
C 'A' undergoes splitting at PSI, transport of H+ through photosystems causes transfer of e- across the thylakoid membrane.
D x' and y' are formed on the stroma side of the thylakoid membrane and e- are transported through iron and copper-containing carriers.

The correct answer is:
x' and y' are formed on the stroma side of the thylakoid membrane and e- are transported through iron and copper-containing carriers.

Solution:
In the above Z‐scheme, x and y are ADP and NADP. NADP reductase is present in the grana thylakoid towards stroma. It breaks down the proton concentration gradient to produce ATP through CF0−CF1. Photolysis of H2O occurs in the lumen and again proton concentration gradient is established along the thylakoid membrane.

Topic: Biology, Photosynthesis in Higher Plants, NEET
Observe the diagram and state the false statement.

Options:
A In this graph, -1, 0, +1, +2 are millivolts and 0, 0.2. 0.4,.... are seconds.
B Wave 1 represents impulse generated by SA node.
C Wave 5 represents ventricular depolarization which causes ventricular relaxation.
D Waves 2, 3 and 4 represent spreading of impulse from AV node to Purkinje fibers

The correct answer is:
Wave 5 represents ventricular depolarization which causes ventricular relaxation.

Solution:
The electrocardiogram is a report generated depicting the electrical activities of the heart. It resembles a graph paper showing time in secs on the X axis and current in millivolt on the Y axis. The wave 1 is the P wave which indicates the current generated from the SA node going towards both the atria and the AV node. The P wave represents the electrical activity - atrial depolarization and the segment PQ indicates the muscular activity of atrial contraction. The waves 2, 3 & 4 are called the Q,R,S waves which represent the electrical activity - ventricular depolarization indicating that the current moves from the AV Node to the Bundle of His to the Purkinje fibers. The ST segment after that represents the muscular activity of ventricular contraction. The wave 5 is the 'T' wave which represents the electrical activity - ventricular repolarization. The segment after that indicates the muscular activity of ventricular relaxation.

Topic: Biology, Body Fluids and Circulation, NEET
Observe the diagram and state the incorrect statement regarding it?

Options:
A Light is a limiting factor in the region A.
B Region C represents that rate of photosynthesis is not increased further by increasing light intensity because some other factors become limiting.
C Point D represents the intensity of light at which some other factor became limiting.
D The rate of photosynthesis does not depend upon light intensity but depends upon light duration.

The correct answer is:
The rate of photosynthesis does not depend upon light intensity but depends upon light duration.

Solution:
There is a linear relationship between incident light and carbon dioxide fixation rates at low light intensities. At higher light intensities, gradually the rate does not show further increase as other factors become limiting. Light saturation occurs at 10 per cent of the full sunlight. Hence, except for plants in shade or in dense forests, light is rarely a limiting factor in nature. Increase in incident light beyond a point causes the breakdown of chlorophyll and a decrease in photosynthesis.

Topic: Biology, Photosynthesis in Higher Plants, NEET
Observe the diagram given below.

Which of the following describes the parts labeled as 1, 2 and 3 correctly?

i. It represents the plumule which further develops into the shoot.

ii. Large shield shaped cotyledon.

iii. Further develops into the primary root.

Options:
A 1-iii,Â Â 2-Â i,Â 3-ii .
B 1-ii, 2-i, 3-iii .
C 1-iii,Â 2-ii,Â 3-i .
D 1-i,Â 2-iii,Â 3-ii .

The correct answer is:
1-ii, 2-i, 3-iii .

Solution:
The diagram represents a monocotyledonous seed. 1 is a scutellum which is a large, modified, cotyledon having a shield shape. 2 is a plumule is a small structure that represents the stem of an embryo. 3 is a radicle which also a part of an embryo, which later develops into a primary root to absorb nutrients.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Observe the diagram given below.

Which of the following is a correct match?

Options:
A A: Pigmented and opaque structure, B: The layer made up of dense, connective tissue
B B: The layer which has photoreceptor cells, C: The second cranial nerve
C C: The third cranial nerve, D: The central pit present in macula lutea
D A: Transparent and pigmented structure, D: The central pit present in macula lutea

The correct answer is:
B: The layer which has photoreceptor cells, C: The second cranial nerve

Solution:
A: Cornea: Part where the image perceived by the eye is formed. B: Retina: The innermost layer of eye which contains the photoreceptor cells i.e. rods and cones.
C: Optic nerve: The second cranial nerve which is sensory in function.
D: Fovea: The central pit which is present in a yellow pigmented spot called macula lutea.

Topic: Biology, Neural Control and Coordination, NEET
Observe the diagram given below:

Which of the following statements regarding the above diagram is/are correct?

Options:
A 1 is a syncytium, as its cytoplasm contains many nuclei.
B 2 are held together by connective tissue layer called fascia.
C 2 is the structural as well as the functional unit of muscle.
D 3 is the membrane which forms a neuromuscular junction along with motor neuron.

The correct answer is:
3 is the membrane which forms a neuromuscular junction along with motor neuron.

Solution:
The given diagram is the cross sectional view of a muscle showing muscle bundles and muscle fibers. The labels are as follows:
1: Fascicle (Muscle bundle): The skeletal muscle in our body is held together by a number of muscle bundles called fascicles. These fascicles are held together by a layer of collagenous tissue known as fascia.
2: Muscle fiber (Muscle cell): The muscle fiber is a syncytium as its cytoplasm i.e. sarcoplasm contains many nuclei. It is the anatomical unit of muscle but the functional unit is sarcomere.
3: Sarcolemma: It is the membrane which encloses the muscle fibers. The junction between a motor neuron and the sarcolemma of the muscle fibre is called the neuromuscular junction or motor-end plate.

Topic: Biology, Locomotion and Movement, NEET