datavorous/entrance-exam-dataset huggingface dataset:
Which of the following statements regarding circular motion is true? (a) The net acceleration of a particle in circular motion is always along the radius of the circle towards the center (b) The velocity vector of a particle at a point is always along the tangent to the path of the particle at that point (c) The acceleration vector of a particle in uniform circular motion averaged over one cycle is a null vector

Options:
A (a) True, (b) True, (c) True
B (a) True, (b) True, (c) False
C (a) True, (b) False, (c) True
D (a) False, (b) True, (c) True

The correct answer is:
(a) False, (b) True, (c) True

Solution:
Correct Option is : (D)
(a) False, (b) True, (c) True

Topic: Chemistry, Motion In Two Dimensions, NEET
Which of the following statement/s regarding coelenterates is/are WRONG?

(i) Cnidocytes are present on the tentacles and on the body.

(ii) Diploblastic with the cellular level of organization.

(iii) Polyp forms are free-swimming.

(iv) Many exhibits metagenesis.

(v) Polyps produce medusa sexually and medusa produce polyps asexually.

Options:
A (ii) and (iv) only
B (iii) and (v) only
C (ii), (iii) and (v)
D (i), (ii) and (iii)

The correct answer is:
(ii), (iii) and (v)

Solution:
Phylum coelenterates are also known as cnidarians as they possess cnidocytes. These are stinging cells present on tentacles and throughout the body. This phylum shows tissue level of organization and is diploblastic as mesoderm is absent. Some organisms show metagenesis. These show two forms i.e. polyp and medusa. Polyp is cylindrical in shape while medusa are umbrella-shaped. Polyp is sessile while medusa are free living. Polyp produces medusa asexually while medusa forms polyp sexually. This is alternation of generation.

Topic: Biology, Animal Kingdom, NEET
Which of the following statements regarding coenzymes and prosthetic groups of enzymes is not true?

Options:
A Both are required for enzyme action
B Both can be separated from enzyme by dialysis
C Both are organic compounds
D Both are not polypeptides

The correct answer is:
Both can be separated from enzyme by dialysis

Solution:
The term prosthetic group is used as the non-protein moiety tightly binds (covalently) with the apoenzyme. The coenzyme can be separated by dialysis from the enzyme while the prosthetic group cannot be, as coenzyme is not bound with apoenzyme tightly.

Topic: Chemistry, Biomolecules, NEET
Which of the following statements regarding copper salts is not true:

Options:
A Copper (I) disproportionates into Cu and Cu (II) in aqueous solution
B Copper (I) can be stabilized by the formation of insoluble complex compounds such as CuCl2-andCu(CN)2-
C Copper (II) oxide is red powder
D Hydrated CuSO4is[Cu(H2O)4]SO4.H2O

The correct answer is:
Copper (II) oxide is red powder

Solution:
Copper (II) oxide is black powder

Topic: Chemistry, d and f Block Elements, NEET
Which of the following statements regarding decomposition is false?

Options:
A Warm and moist environment favours decomposition.
B Decomposition rate is slower if detritus is rich in chitin and lignin.
C Earthworm is a detritivore
D Precipitation of soluble inorganic nutrients into the soil horizon as unavailable salts is called mineralisation.

The correct answer is:
Precipitation of soluble inorganic nutrients into the soil horizon as unavailable salts is called mineralisation.

Solution:
Leaching: Part of water-soluble substances present in the fragmented and decomposition detritus (e.g., sugars, inorganic nutrients) go down into the soil horizon by percolating water and get precipitated as unavailable salts.
Mineralisation: It is the release of inorganic substances by saprophytic microbes (e.g. CO2, H2O, minerals) from organic matter or humus during the process of decomposition.

Topic: Biology, Environmental Issues, NEET
Which of the following statements regarding enzyme inhibition is correct?

Options:
A Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate
B Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibition protein
C Competitive inhibition is seen when the substrate and the inhibitor compete
D Non-competitive inhibitors often bind to the enzyme irreversibly

The correct answer is:
Competitive inhibition is seen when the substrate and the inhibitor compete

Solution:
Competitive inhibition is seen, when the substrate and the inhibitor compete for the same active site on enzyme as their structures are similar.

Topic: Chemistry, Biomolecules, NEET
Which of the following statements regarding female reproductive system is incorrect?

Options:
A Oviducts, uterus and vagina constitute the female accessory ducts.
B The narrowest part of the oviduct is the ampulla.
C The uterus opens into the vagina through a narrow cervix.
D Mons pubis is a cushion of fatty tissue covered by skin and pubic hair.

The correct answer is:
The narrowest part of the oviduct is the ampulla.

Solution:
I. The female accessory ducts are constituted by the oviducts, i.e., fallopian tube, uterus and vagina.
II. The ampulla is the widest part of the oviduct. It is the part where sperm and ovum are transported simultaneously by the fimbriae. Union of sperm and ovum, i.e., fertilisation occurs in this part.
III. The uterus opens into the vagina through a narrow cervix. The cavity of the cervix is known as the cervical canal.
IV. Mons pubis is a part of the female external genitalia. It is a cushion of fatty tissue covered by skin and pubic hair.

Topic: Biology, Human Reproduction, NEET
Which of the following statements regarding fertilization and implantation are incorrect?

I. During fertilization, a sperm first comes in contact with the corona radiata cells produced by the ovum.
II. Fertilization occurs only if sperm and ovum are simultaneously transported to the ampullary region.
III. Implantation occurs about 7 days after fertilization.
IV. The continuous division of morula leads to the formation of zygote.

Options:
A I and II
B I, II and III
C I and IV
D II, III and IV

The correct answer is:
I and IV

Solution:
I. Corona radiata cells are not produced by the ovum. They are produced by the ovary which forms the follicle around the ovum.
II. Fertilization is the process of the union of sperm and ovum, which leads to the formation of zygote. This occurs in the ampulla of the fallopian tube. The sperm is viable for a period of 24-48 hours and an ovum is viable for a period of 24 hours. Therefore, for fertilization to occur, it is necessary that the sperm and ovum are transported simultaneously to the ampullary region.
III. Implantation is the process by which the blastocyst gets embedded in the endometrium. It occurs about 7 days after fertilization.
IV. The continuous division of morula leads to the formation of blastocyst. The blastocyst then further moves towards the uterus for implantation.

Topic: Biology, Human Reproduction, NEET
Which of the following statements regarding fertilization and implantation is incorrect?

Options:
A Fertilization can occur only if sperm and ovum simultaneously reach the ampulla of the fallopian tube.
B During fertilization, the sperm comes in contact with the corona radiata cells of the ovum first and start degrading it.
C The division of the morula leads to the formation of blastocyst.
D The embryo is formed by the differentiation of inner cell mass.

The correct answer is:
During fertilization, the sperm comes in contact with the corona radiata cells of the ovum first and start degrading it.

Solution:
During fertilisation, the sperm first comes in contact with the 'zona pellucida' layer of the ovum. Certain enzymes are released by the acrosome of the sperm. These enzymes cause certain changes in the zona pellucida layer. Thus, the entry of further sperms is prevented.

Topic: Biology, Human Reproduction, NEET
Which of the following statements regarding food chain is false?

Options:
A In an aquatic ecosystem, grazing food chain is the major conduit for energy flow.
B In terrestrial ecosystems, a large fraction of energy flows through detritus food chain.
C The detritus food chain begins with dead organic matter.
D Primary consumers belong to the first trophic level.

The correct answer is:
Primary consumers belong to the first trophic level.

Solution:
All animals depend on plants directly or indirectly for their food needs. They are hence, called consumers and also heterotrophs. If they feed on the producer, the plants (belonging to the first trophic level), they are called primary consumers. Obviously the primary consumers will be herbivores. Some common herbivores are insects, birds and mammals in terrestrial ecosystem and molluscs in aquatic system. Thus, primary consumers belong to the second trophic level.

Topic: Biology, Ecosystem, NEET
Which of the following statements regarding hydrides is not correct?

Options:
A Ionic hydrides are crystalline, non-volatile and non-conducting in solid state
B Electron-deficient hydrides act as Lewis acids or electron acceptors
C Elements of group-13 form electron-deficient hydrides
D Elements of group 15-17 form electron-precise hydrides

The correct answer is:
Elements of group 15-17 form electron-precise hydrides

Solution:
Elements of group 15-17 form electron-rich hydrides. Like NH3,PH3,H2S
Electron-deficient hydrides act as Lewis acids or electron acceptors Like BH3,BeH2
Ionic hydrides are crystalline, non-volatile and non-conducting in solid state also. Hence only D statement is wrong.

Topic: Chemistry, s Block Elements, NEET
Which of the following statements regarding impulse transmission is incorrect?

I. Chemicals called neurotransmitters are involved in impulse transmission across the synapses.
II. The membranes of the pre-synaptic and post-synaptic neuron are separated by an empty space called the synaptic cleft.
III. The released neurotransmitters bind to the specific receptors present on the pre-synaptic membrane.
IV. The new potential which develops is always excitatory.

Options:
A II and III
B I, II and IV
C I and III
D II, III and IV

The correct answer is:
II, III and IV

Solution:
Chemicals called neurotransmitters are involved in the transmission of impulse across the synapses. The membranes of the pre-synaptic and post-synaptic neuron are separated by a fluid-filled space called the synaptic cleft. The released neurotransmitters bind to the specific receptors present on the postsynaptic membrane. The new potential which develops may be excitatory or inhibitory.

Topic: Biology, Neural Control and Coordination, NEET
Which of the following statements regarding infertility is incorrect?

Options:
A Infertility is the inability to produce children in spite of regular unprotected sexual intercourse.
B Infertility could be present in the male or female partner or both of them.
C Infertility is caused only due to physical reasons.
D Assisted Reproductive Technologies can prove to be a great help for infertile couples.

The correct answer is:
Infertility is caused only due to physical reasons.

Solution:
Infertility is the inability to produce children in spite of regular unprotected sexual intercourse. Infertility could be present in the male or female partner or both of them. It can be caused due to physical, congenital, immunological, and psychological reasons and even due to diseases and drugs. Assisted Reproductive Technologies like GIFT, ZIFT etc. can prove to be a great help for infertile couples.

Topic: Biology, Reproductive Health, NEET
Which of the following statements regarding joints is incorrect?

Options:
A Shoulder joint is a type of ball and socket joint with synovial fluid.
B Fibrous joints do not permit any movement.
C Cartilaginous joint allows considerable free movement.
D Saddle joint is present between the carpal and metacarpal of thumb.

The correct answer is:
Cartilaginous joint allows considerable free movement.

Solution:
Cartilaginous joints permit limited movements. Hence, they are called amphiarthrosis. In these joints, the bones involved are held together with the help of cartilage, e.g., the joint between adjacent vertebrae. Synovial joints are freely movable joints with synovial fluid present between the bones. It is seen in the shoulder joint as ball and socket joint as well as saddle joint of the thumb.

Topic: Biology, Locomotion and Movement, NEET
Which of the following statements regarding metabolic pathways is incorrect?

Options:
A Many of the steps of glycolysis can run in reverse.
B Starch, sucrose or glycogen must be hydrolysed before it can enter the glycolysis.
C After fats are digested, glycerol enters glycolysis by forming DHAP.
D After fat digestion, fatty acids can no longer participate in cellular respiration.

The correct answer is:
After fat digestion, fatty acids can no longer participate in cellular respiration.

Solution:
Glucose is the commonest substrate for respiration. All types of carbohydrates are first converted into glucose, which then enters the respiratory pathway i.e. Glycolysis. Similarly, proteins and fats, too, can join the path but not directly. Fats first breaks down into fatty acids and glycerol. Fatty acids can enter the respiratory pathway only if it breaks down into acetyl Co-A while glycerol will form PGAL (Phosphoglyceraldehyde) to enter the path. Thus both the products of fat metabolism can enter the respiratory pathway. Proteins breakdown into amino acids and these enter the Kreb's cycle at different stages too.

Topic: Biology, Respiration in Plants, NEET
Which of the following statements regarding mitochondria is incorrect?

Options:
A Outer membrane is permeable to monomers of carbohydrates, fats and proteins.
B Enzymes of electron transport are embedded in outer membrane.
C Inner membrane is convoluted with infoldings.
D Mitochondria matrix contains single circular DNA molecule and ribosomes.

The correct answer is:
Enzymes of electron transport are embedded in outer membrane.

Solution:
The thickness of the outer mitochondrial membrane, which encloses the entire organelle, is 60 to 75 angstroms Å . It has a protein-to-phospholipid ratio similar to that of the cell membrane (about 1:1 by weight). It consists of a large number of porins, an integral membrane proteins. The pore-forming voltage-dependent anion channel is the major trafficking protein.
The inner membrane of mitochondria has convoluted foldings.
The inner membrane encloses the matrix. It consists of 2/3 of the total protein in a mitochondrion. The matrix is important in ATP synthesis with the aid of the ATP synthase contained in the inner membrane. The matrix contains a highly concentrated mixture of hundreds of enzymes, special mitochondrial ribosomes, tRNA, and several copies of the mitochondrial DNA genome. Therefore, 2 is the answer.

Topic: Biology, Cell - The Unit of Life, NEET, NEET 2019 (All India)
Which of the following statements regarding mitochondrial membrane is not correct ?

Options:
A the outer membrane resembles a sieve
B the outer membrane is permeable to all kinds of molecules
C the enzymes of the electron transfer chain are embedded in the outer membrane
D the inner membrane is highly convoluted forming a series of infoldings

The correct answer is:
the enzymes of the electron transfer chain are embedded in the outer membrane

Solution:
In mitochondria, the outer membrane is semi permeable, and thus resembles a sieve permeable to all molecules of 10,000 Daltons. The inner membrane is selectively permeable and highly convoluted, forming a series of infoldings known as cristae. The enzymes of the electron transport chain are found in the inner membrane, while the outer membrane contains enzymes involved in mitochondrial lipid synthesis.
Related Theory
The inner membrane surrounds a central fluid-filled space called inner chamber or mitochondrial matrix. The machinery for energy generation can be found on the cristae (infoldings of the inner membrane). The matrix side of the inner membrane and cristae bear numerous tennis racket-like particles called oxysomes or elementary particles or $F_0-F_1$ particles. The cristae and the proteins of the inner membrane aid in the production of ATP molecules during oxidative phosphorylation. Enzymes of electron transport chain are located in the inner membrane.

Topic: Biology, Photosynthesis in Higher Plants, NEET, NEET 2006
Which of the following statements regarding nitrogen pentoxide is not correct?

Options:
A Nitrogen pentoxide is a colourless, deliquescent liquid
B Nitrogen pentoxide is the anhydride of nitric acid
C Solid N2O5 is a covalent molecule
D The molecule of N2O5 in planar

The correct answer is:
Solid N2O5 is a covalent molecule

Solution:
Solid N2O5 exist as NO2+NO3-

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following statements regarding slime moulds is true?

Options:
A They show autotrophic mode of nutrition.
B The spores produced by them in harsh environments, possess true walls.
C Slime moulds form aggregation called vegetation.
D The spores produced by them require water for dispersal.

The correct answer is:
The spores produced by them in harsh environments, possess true walls.

Solution:
Slime moulds are saprotrophic protists which produce spores with true walls. These spores are resistant to environmental stress and can survive for months or years. These spores are also easily dispersed by air currents.

Topic: Biology, Biological Classification, NEET
Which of the following statements regarding the angular momentum vector of a system consisting of two particles, each of mass m and speed v, traveling in opposite directions along parallel lines separated by a distance d is true?

Options:
A The angular momentum vector depends on the point about which it is taken.
B The angular momentum vector is zero for this system.
C The angular momentum vector is independent of the point about which it is taken.
D The angular momentum vector is undefined for this system.

The correct answer is:
The angular momentum vector is independent of the point about which it is taken.

Solution:
Correct Option is : (C)
The angular momentum vector is independent of the point about which it is taken.

Topic: Chemistry, Rotational Motion, NEET
Which of the following statements regarding the liquefaction of CO2at 32°C and 80 atm pressure is correct?

Options:
A CO2can be liquefied at 32°C and 80 atm pressure.
B CO2cannot be liquefied at 32°C and 80 atm pressure due to its temperature being above the critical temperature.
C CO2can be liquefied at 32°C and 80 atm pressure, but it requires additional cooling.
D CO2cannot be liquefied at 32°C and 80 atm pressure due to insufficient pressure.

The correct answer is:
CO2cannot be liquefied at 32°C and 80 atm pressure due to its temperature being above the critical temperature.

Solution:
Correct Option is : (B)
CO2cannot be liquefied at 32°C and 80 atm pressure due to its temperature being above the critical temperature.

Topic: Chemistry, States of Matter, NEET
Which of the following statements regarding the SN1 reaction shown by alkyl halide is not correct?

Options:
A the added nucleophile plays no kinetic role in SN1 reaction
B The SN1 reaction involves the inversion of configuration of the optically active substrate
C the SN1 reaction on the chiral starting material end up with racemization of the product
D The more stable the carbocation intermediate the faster the SN1 reaction

The correct answer is:
The SN1 reaction involves the inversion of configuration of the optically active substrate

Solution:
In SN1 reaction, rate of substitution depends on the concentration of substrate only and not upon nucleophile. In case of SN1 reaction there is recemization and no inversion. SN1 reaction will be faster, if carbocation formed is more stable.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Which of the following statements regarding the structure of contractile proteins are correct?

I. Each actin filament is made up of two 'F' actins, which are wound helically around each other.
II. Two types of troponins are distributed at regular intervals on the tropomyosin.
III. The globular head of meromyosin has binding sites for ATP and troponins.
IV. Myosin is a structural protein which also has enzymatic activity.

Options:
A II, III and IV
B I and IV
C I, II and III
D II and IV

The correct answer is:
I and IV

Solution:
Three types of protein troponin: troponin T, troponin I and troponin C are distributed at regular intervals on the tropomyosin. The globular head of meromyosin is an active ATPase enzyme. It has binding sites for ATP and active sites for 'actin'. Due to its ATPase activity, mysosin which is a contractile structural protein also has enzymatic action.

Topic: Biology, Locomotion and Movement, NEET
Which of the following statements regarding the structure of pro-insulin and mature insulin is INCORRECT?

(i) Pro-insulin is made up of three polypeptide chains- A, B, and C.

(ii) C-polypeptide chain with 33 amino acids is removed prior to insulin formation.

(iii) Mature insulin is made up of 51 amino acids arranged in two polypeptide chains- A and B.

(iv) Polypeptide chain A has 30 amino acids and polypeptide chain B has 21 amino acids.

(v) Polypeptide chains A and B are interconnected by only one S - S linkage.

Options:
A (i) and (ii)
B (iii) and (iv)
C (iv) and (v)
D (iii), (iv) and (v)

The correct answer is:
(iv) and (v)

Solution:
Proinsulin has three polypeptide chains- A, B, C . The mature insulin has only A and B . C polypeptide is removed before the insulin matures. It has 33 amino acids. Mature insulin has 51 amino acids out of which A polypeptide has 21 amino acids and B has 30 amino acids. Polypeptide A and B are interconnected by two disulfide linkages.

Topic: Biology, Biotechnology and Its Applications, NEET
Which of the following statements regarding universal rules of nomenclature is wrong?

Options:
A The first word in a biological name represents the genus
B The first word denoting the genus starts with a capital letter
C Both the words in a biological name, when handwritten are separately underlined
D Biological names are generally in Greek and written in italics

The correct answer is:
Biological names are generally in Greek and written in italics

Solution:
There are certain rules
(i) The names are in Latin language, sometimes in Greek.
(ii) Generic name begins with the capital letter and is placed before specific name.
The specific name begins with a small letter.
(iii) The scientific name should either be underlined or italicized.
(iv) Name of the authority should be written after specific epithet in an abbreviated from.

Topic: Biology, The Living World, NEET
Which of the following statements regarding vaccination and immunisation are correct?

I. The principle of vaccination is based on the 'memory' of the immune system.

II. The antibodies produced in the body against antigens neutralise the pathogenic agents before the actual infection.

III. Hepatitis B vaccine is prepared by using a virus in recombinant DNA technology.

IV. Antibodies are given directly in case of infection with deadly microbes to elicit quick immune response.

Options:
A I and III
B II, III and IV
C I, II and III
D I and IV

The correct answer is:
I and IV

Solution:
II. The antibodies produced in the body against antigens neutralise the pathogenic agents during the initial infection itself and prevent further infection.
III. Hepatitis B vaccine is prepared by using yeast in recombinant DNA technology.

Topic: Biology, Human Health and Diseases, NEET
Which of the following statements related to green light is correct?

Options:
A The atmosphere filters out all the colours of the visible light spectrum except green.
B The green light is the most effective wavelength region of the visible spectrum in sunlight for photosynthesis.
C Chlorophyll is least effective in absorbing green light.
D The green light allows maximum photosynthesis.

The correct answer is:
Chlorophyll is least effective in absorbing green light.

Solution:
The leaves appear green because of the pigment chlorophyll, which does not absorb green light rather reflects it back.

Topic: Biology, Photosynthesis in Higher Plants, NEET