datavorous/entrance-exam-dataset huggingface dataset:
Which one of the following plant hormones is not correctly matched with its function?

Options:
A Abscisic acid – Stomatal closure
B Gibberellic acid – leaf fall
C Cytokinin – Cell division
D IAA – Apical dominance

The correct answer is:
Gibberellic acid – leaf fall

Solution:
ABA commonly called as stress hormone causes closure of stomata. Cytokinin is important in promoting cell division, and auxin promotes apical dominance by inhibiting the growth of lateral bud. Gibberellin is a growth promoting hormone it delays the process of senescence and inhibits leaf fall.

Topic: Biology, Plant - Growth and Development, NEET
Which one of the following plants are used as green manure in crop fields and in sandy soils ?

Options:
A Crotalaria juncea and Alhagi camelorum
B Calotropis procera and Phyllanthus niruri
C Saccharum, munja and Lantana camara
D Dichanthium annulatum and Azolla nilotica

The correct answer is:
Crotalaria juncea and Alhagi camelorum

Solution:
Crotalaria juncea and Alhagi camelelorum belong to families Fabaceae and Papilionaceae respectively and are used as green manures in crop fields and in sandy soils.
Related Theory
Crotalaria juncea and Alhagi camelelorum belong to families Fabaceae and Papilionaceae respectively and are used as green manures in crop fields and in sandy soils.

Topic: Biology, Morphology of Flowering Plants, NEET, NEET 2003
Which one of the following plants does not show plasticity?

Options:
A Coriander
B Buttercup
C Maize
D Cotton

The correct answer is:
Maize

Solution:
Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called plasticity. Example heterophylly in cotton, coriander and larkspur. In such plants, the leaves of the juvenile plant are different in shape from those in mature plants. Maize plants do not show plasticity.

Topic: Biology, Plant - Growth and Development, NEET, NEET 2022 (Phase 1)
Which one of the following plants is monoecious?

Options:
A Marchantia
B Pinus
C Cycas
D Papaya

The correct answer is:
Pinus

Solution:
Pinus is monoecious, which bear male cone as well as female cone on the same tree on separate branches.
Marchantia Cycas and papaya are dioecious plants.

Topic: Biology, Plant Kingdom, NEET, NEET 2009 (Screening)
Which one of the following plants reproduces vegetatively by epiphyllous buds (adventitious)?

Options:
A Sweet potato
B Potato
C Onion
D Bryophyllum

The correct answer is:
Bryophyllum

Solution:
When the buds arise on the leaves, they are called epiphyllous or adventitious leaf buds, e.g., Bryophyllum, Kalanchoe.

Topic: Biology, Morphology of Flowering Plants, NEET
Which one of the following plasma proteins is involved in the coagulation of blood?

Options:
A Serum amylase
B A globulin
C Fibrinogen
D An albumin

The correct answer is:
Fibrinogen

Solution:
Fibrinogen (factor 1) is a soluble plasma glycoprotein, synthesised by the liver. It is converted by thrombin into fibrin during blood coagulation. Fibrin is then cross-linked by factor XIII to form a clot.

Topic: Biology, Body Fluids and Circulation, NEET, NEET 2011 (Screening)
Which one of the following polymer in used to make 'non-stick' cookware?

Options:
A PVC
B Polystyrene
C Polyethylene terephthalate
D Polytetrafluoroethylene

The correct answer is:
Polytetrafluoroethylene

Solution:
Teflon has great chemical inertness and high thermal stability, hence used for making non-stick utensils. For this purpose, a thin layer of teflon is coated on the inner side of the vessel.

Topic: Chemistry, Polymers, NEET
Which one of the following polymers is prepared by addition polymerisation?

Options:
A Teflon
B Nylon-6,6
C Novolac
D Dacron

The correct answer is:
Teflon

Solution:
Teflon is formed by addition polymerisation of tetrafluoroethylene.

Nylon-66, Novolac and Dacron are condensation polymers.

Topic: Chemistry, Polymers, NEET, NEET 2021
Which one of the following polymers is prepared by condensation polymerisation?

Options:
A Teflon
B Natural rubber
C Styrene
D Nylon-66

The correct answer is:
Nylon-66

Solution:
Copolymer of adipic acid and hexamethylene diamine gives nylon 66.
$n \mathrm{HOOC}\left(\mathrm{CH}_2\right)_4 \mathrm{COOH}+n \mathrm{H}_2 \mathrm{~N}\left(\mathrm{CH}_2\right)_6 \mathrm{NH}_2 \rightarrow$ Nylon 66
Related Theory
Nylon-66 has high tenacity and elasticity. It is resistant to abrasion and not affected by sea water. It is used for reinforcement of rubber tyres, manufacture of parachute, safety belts, carpets and fabrics.

Topic: Chemistry, Polymers, NEET, NEET 2007
Which one of the following polymers is prepared by condensation polymerisation?

Options:
A Teflon
B Natural rubber
C Styrene
D Nylon-6, 6

The correct answer is:
Nylon-6, 6

Solution:
Nylon-6, 6 is a condensation polymer of adipic acid and hexamethylene diamine.
nHOOC− ( CH 2 ) 4 −COOH Adipic acid + nH 2 N− ( CH 2 ) 6 − NH 2 Hexamethylenediamine → Δ − N | H − ( CH 2 ) 6 − N | H − C || O − ( CH 2 ) 4 − C || O − Nylon−6,6 n

Topic: Chemistry, Polymers, NEET
Which one of the following precedes reformation of the nuclear envelope during $\mathrm{M}$ phase of the cell cycle?

Options:
A decondensation from chromosomes, and reassembly of the nuclear lamina
B transcription from chromosomes, and reassembly of the nuclear lamina.
C formation of the contractile ring, and formation of the phragmoplast
D formation of the contractile ring, and transcription from chromosomes.

The correct answer is:
decondensation from chromosomes, and reassembly of the nuclear lamina

Solution:
The re-formatoin of the nuclear envelope during M-phase of the cell cycletakes place during telophase.
The nuclear membrane which disappears during prophase reappears in the telophase. But before it is reformed the nucleus gets reorganised by decondensation from chromosome and reassembly of the nuclear lamina.
Related Theory
Crossing over occurs between prophase I and metaphase I (pachylene stage) and is the process where two homologous non-sister chromatids pair up with each other and exchange different segments of genetic material to form two recombinant chromosome sister chromatids.

Topic: Biology, Cell Cycle and Cell Division, NEET, NEET 2004
Which one of the following process does not occur during inspiration in humans?

Options:
A contraction of internal intercostal muscles
B contraction of phrenic muscles
C an overall increase in the volume of the thoracic chamber
D the intra-pulmonary pressure decreases than atm. pressure

The correct answer is:
contraction of internal intercostal muscles

Solution:
During inspiration, contraction of the external intercostal muscles between ribs and phrenic muscles of diaphragm occurs. Due to this, the volume of thoracic chamber increases from all sides and this also increases the pulmonary volume and therefore decreases pulmonary pressure than atmospheric pressure.

Topic: Biology, Breathing and Exchange of Gases, NEET
Which one of the following processes during decomposition is correctly described?

Options:
A Fragmentation-Carried out by organisms such as earthworm
B Humification-Leads to the accumulation of a dark coloured substance humus, which undergoes microbial action at a very fast rate
C Catabolism-Last step in the decomposition under fully anaerobic condition
D Leaching-Water soluble inorganic nutrients rise to the top layers of soil

The correct answer is:
Fragmentation-Carried out by organisms such as earthworm

Solution:
F ragmentation is one of the steps during decomposition, in which detritus is converted into small fragments. Humification leads to dark coloured amorphous substance called humus that is highly resistent to microbial action and undergoes decomposition at an extremely slow rate.
Catabolism is the set of metabolic pathways that breaks down molecules into smaller units to rekase energy. Leaching lefers to the loss of water soluble plant nutrients from the soil due to rain and irrigation.

Topic: Biology, Ecosystem, NEET, NEET 2013 (All India)
Which one of the following processes is not involved in beer production?

Options:
A Melting
B Mashing
C Fermentation
D Distillation

The correct answer is:
Distillation

Solution:
In general, there are five basic components of the beer-making process: harvesting, crushing and pressing, fermentation, clarification, and ageing and bottling.
Steps of alcohol production: Grain receiving, milling, slurry tanks, primary liquefaction, simultaneous saccharification, fermentation, distillation, molecular sieves.

Topic: Biology, Microbes in Human Welfare, NEET
Which one of the following processes is used for the manufacturing of calcium?

Options:
A Reduction with CaO with hydrogen
B Electrolysis of molten Ca(OH) 2
C Electrolysis of a mixture of anhydrous CaCl2 and CaF 2
D Reduction of CaO with carbon

The correct answer is:
Electrolysis of a mixture of anhydrous CaCl2 and CaF 2

Solution:
Calcium is obtained by electrolysis of a fused mass consisting six parts CaCl2 and one part CaF2 at about 700oC in an electrolytic cell made of graphite which acts as anode and a water cooled cathode of iron.
CaCl2⇌Ca2++2Cl-
At anode: 2Cl-→Cl2+2e-
At cathode: Ca2++2e-→Ca

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which one of the following processes occurs inside the nucleus during protein synthesis in eukaryotic cells?

Options:
A Processing of hnRNA
B Activation of amino acids
C Translation
D Formation of polypeptide chain

The correct answer is:
Processing of hnRNA

Solution:
Eukaryotic mRNAs are monocistronic. The primary transcript in eukaryotes is much larger than the mature mRNA and is called heterogeneous nuclear RNA (hnRNA). It contains unique sequences and has about 10 times as many sequences as the mature mRNA. hnRNA undergoes processing in the nucleus, by the phenomenon known as post-transcriptional modification, and finally, the mRNA is produced, and therefore, it is called âmRNA precursorâ or âpre-mRNAâ.

Topic: Biology, Molecular Basis of Inheritance, NEET
Which one of the following processes results in the formation of a clone of bacteria?

Options:
A Conjugation
B Binary fission
C Transduction
D Transformation

The correct answer is:
Binary fission

Solution:
Binary fission (division in half) is a type of asexual reproduction. It is the most common form of reproduction in prokaryotes such as bacteria. It occurs in some single-celled eukaryotes like the Amoeba and the Paramoecium. In binary fission DNA replication and segregation occur simultaneously. The daughter cells formed has an exact copy of the parental DNA and they are clones of it.

Topic: Biology, Reproduction in Organisms, NEET
Which one of the following produces nitrogen fixing nodules on the roots of Alnus ?

Options:
A Frankia
B Rhodospirillum
C Beijernickia
D Rhizobium

The correct answer is:
Frankia

Solution:
The most common association on roots is nodules. These nodules are small outgrowths on the roots. Frankia is a genus of nitrogen-fixing, free-living, filamentous bacteria. It produces nitrogen-fixing nodules on the roots of non-leguminous plants (e.g., Alnus).

The species of rod-shaped Rhizobium forms nodules with the roots of several legumes and helps in nitrogen fixation.

Topic: Biology, Mineral Nutrition, NEET, NEET 2022 (Phase 1)
Which one of the following products diffuses out of the chloroplast during photosynthesis?

Options:
A ADP
B NADPH
C $\mathrm{O}_2$
D ATP

The correct answer is:
$\mathrm{O}_2$

Solution:
Product of light reaction are ATP, NADPH and $\mathrm{O}_2$. Of these $\mathrm{O}_2$ diffuses out of the chloroplast while ATP and NADPH are used to drive the processes leading to synthesis of food, more accurately, sugars.

Topic: Biology, Photosynthesis in Higher Plants, NEET, NEET 2024 (Re-NEET)
Which one of the following proved effective for biological control of nematodal diseases in plants?

Options:
A Pisolithus tinctorius
B Pseudomonas cepacin
C Glocladium virens
D Paecitomyces litacinus

The correct answer is:
Paecitomyces litacinus

Solution:
Paecilomyces lilacinus is proved effective for biological control of nematodal disease in plants. It is easily produced in vitro. Rhizosphere competent, attack the eggs of several nematodes species and treatment of plant matter, $e g$, seed tuber, can be effective.

Topic: Biology, Biotechnology and Its Applications, NEET, NEET 2008 (Screening)
Which one of the following reaction sequence is incorrect method to prepare phenol?

Options:
A Aniline, $\mathrm{NaNO}_2+\mathrm{HCl}, \mathrm{H}_2 \mathrm{O}$, heating
B Cumene, $\mathrm{O}_2, \mathrm{H}_3 \mathrm{O}^{+}$
C

D

The correct answer is:

Solution:
(1)
(2)
(3)
(4)

Topic: Chemistry, Alcohols Phenols and Ethers, NEET, NEET 2022 (Phase 2)
Which one of the following reactions can be used for the preparation of β -hydroxy acid

Options:
A Perkin reaction
B Reformatsky reaction
C Aldol condensation
D Claisen condensation

The correct answer is:
Reformatsky reaction

Solution:
Reformatsky reaction can be used for the preparation of Î² -hydroxy acid for e.g.,

Topic: Chemistry, Aldehydes and Ketones, NEET
Which one of the following reactions does not come under hydrolysis type reaction?

Options:
A SiCl4(l)+2H2O(l)→SiO2(s)+4HCl(aq)
B Li3N(s)+3H2Ol→NH3(g)+3LiOH(aq)
C 2F2(g)+2H2Ol→4HF(aq)+O2(g)
D P4O10(s)+6H2Ol→4H3PO4(aq)

The correct answer is:
2F2(g)+2H2Ol→4HF(aq)+O2(g)

Solution:
2F2(g)+2H2O(ℓ)⟶4HF(aq)+O2(g)
It's a type of Redox reaction.

Topic: Chemistry, Redox Reactions, NEET, NEET 2020 (Phase 2)
Which one of the following reactions does not involve either oxidation or reduction?

Options:
A MnO 4 − → MnO 2
B NaâNa+
C CrO42-âCr2O72-
D Zn2+âZn

The correct answer is:
CrO42-→Cr2O72-

Solution:
C +2 rO 4 2− → C +2 r 2 O 7 2−
In this reaction oxidation and reduction are not involved because there is no change in oxidation number.

Topic: Chemistry, Redox Reactions, NEET
Which one of the following reactions of Xenon compounds is not feasible?

Options:
A XeO 3 + 6HF ⟶ XeF 6 + 3 H 2 O
B 3 XeF 4 + 6H 2 O &xrarr; 2Xe + XeO 3 + 12HF + 1.5 O 2
C 2 XeF 2 + 2H 2 O &xrarr; 2Xe + 4HF + O 2
D XeF 6 + RbF ⟶ Rb [ XeF 7 ]

The correct answer is:
XeO 3 + 6HF ⟶ XeF 6 + 3 H 2 O

Solution:
The reaction XeO 3 + 6HF â¶ XeF 6 + 3 H 2 O is not feasible because XeF6 formed will further produce XeO3 by getting hydrolysed.
XeF6 + H2O → XeOF4 + 2HF
XeOF4 + H2O → XeO2F2 + 2HF
XeO2F2 + H2O → XeO3 + 2HF

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which one of the following reacts with HBr at the fastest rate?

Options:
A
B
C
D

The correct answer is:

Solution:
It is a tertiaryalcohol and hence undergoes dehydration at the fastest rate through carbocation intermediates.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Which one of the following regions of atmosphere contains ozone ?

Options:
A Troposphere
B Thermosphere
C Mesosphere
D Stratosphere

The correct answer is:
Stratosphere

Solution:
Ozone is present in stratosphere (about 20 km above the surface of the earth)

Topic: Chemistry, Environmental Chemistry, NEET
Which one of the following regions of atmosphere contains ozone?

Options:
A Troposphere
B Thermosphere
C Mesosphere
D Stratosphere

The correct answer is:
Stratosphere

Solution:
Ozone is present in stratosphere

Topic: Chemistry, Environmental Chemistry, NEET
Which one of the following represents a palindromic sequence in DNA?

Options:
A 5' - GAATTC - 3'
3' - CTTAAG - 5'
B 5' -CCAATG - 3'
3' - GAATCC - 5'
C 5' - CATTAG - 3'
3' - GATAAC - 5'
D 5' - GATACC - 3'
3' - CCTAAG - 5'

The correct answer is:
5' - GAATTC - 3'
3' - CTTAAG - 5'

Solution:
A palindromic sequence is a nucleic acid sequence that is the same whether read 5' to 3' on one strand or 5' to 3' on the complementary strand with which it forms a double helix.
5' - GAATTC - 3'
3' - CTTAAG - 5'
It is a palindromic sequence of DNA cut by restriction enzyme EcoRI.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which one of the following represents all isoelectronic species?

Options:
A $\mathrm{Na}^{+}, \mathrm{Mg}^{2+}, \mathrm{O}^{-}, \mathrm{F}^{-}$
B $\mathrm{Ca}^{2+}, \mathrm{Ar}, \mathrm{K}^{+}, \mathrm{Cl}^{-}$
C $\mathrm{Na}^{+}, \mathrm{Cl}^{-}, \mathrm{O}^{-}, \mathrm{NO}^{+}$
D $\mathrm{N}_2 \mathrm{O}, \mathrm{N}_2 \mathrm{O}_4, \mathrm{NO}^{+}, \mathrm{NO}$

The correct answer is:
$\mathrm{Ca}^{2+}, \mathrm{Ar}, \mathrm{K}^{+}, \mathrm{Cl}^{-}$

Solution:
(2) $\mathrm{Ca}^{2+}=20-2=18 \mathrm{e}^{-}$
$\begin{aligned} & \mathrm{Ar}=18 \mathrm{e}^{-} \\ & \mathrm{K}^{+}=19-1=18 \mathrm{e}^{-} \\ & \mathrm{Cl}^{-}=17+1=18 \mathrm{e}^{-}\end{aligned}$
So, $\mathrm{Ca}^{2+}, \mathrm{Ar}, \mathrm{K}^{+}$and $\mathrm{Cl}^{-}$are isoelectronic species.

Topic: Chemistry, Structure of Atom, NEET, NEET 2023 (Manipur)
Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?

Options:
A amphitropous
B circinotropous
C atropous
D anatropous.

The correct answer is:
amphitropous

Solution:
In an amphitropous ovule, the embryo sac becomes horse- shoe shaped and the funiculus and micropyle are close to each other. This type of ovule is found in Alismaceae, Butamaceae families.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET, NEET 2005
Which one of the following represents forward bias diode?

Options:
A

B

C

D

The correct answer is:

Solution:
In forward bias, p-type semiconductor is at higher potential w.r.t. n-type semiconductor.

Topic: Physics, Semiconductors, NEET, NEET 2017
Which one of the following represents the correct order of acidic strength?

Options:
A HOClO < HOCl <  HOClO 3 < HOClO 2
B HOClO 2 < HOClO 3 <HOCIO<HOCl
C HOClO 3 < HOClO 2 <HOClO<HOCl
D HOCl<HOCIO< HOClO 2 < HOClO 3

The correct answer is:
HOCl<HOCIO< HOClO 2 < HOClO 3

Solution:
HOCl+1<HCl+3O2<HCl+5O3<HCl+7O4
As the number of oxygen atom increases, an increasing amount of electron density shifts from Cl atom to more electronegative O atom. Hence as the oxidation number of Cl atom increases, the amount of actual positive charge on Cl atom increases which in turn attracts the electron density from O-H bond, hence the O-H bond is weakened and proton is easily released and acidity increases.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which one of the following restriction enzyme can cut TetR site of pBR322?

Options:
A Pvu I, Pst I
B BamH I, Sal I
C Pvu II
D EcoR I

The correct answer is:
BamH I, Sal I

Solution:
pBR 322 plasmid has two antibiotic resistant gene one for Tertracyclin resistant and other for amphicilin resistant, these two functions as selectable marker gene. TetR site has two restriction enzyme recognition site, BamH I and Sal I site.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which one of the following scientist's name is correctly matched with the theory put forth by him?

Options:
A Weismann - Theory of continuity of germplasm
B Pasteur - Inheritance of acquired characters
C de Vries - Natural selection
D Mendel - Theory of pangenesis

The correct answer is:
Weismann - Theory of continuity of germplasm

Solution:

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2008 (Screening)
Which one of the following scientists shared the same views about evolution?

Options:
A Ernst Heckel and Karl Ernst von Baer
B Aristotle and Louis Pasteur
C Lamarck and Weismann
D Charles Darwin and Alfred Wallace

The correct answer is:
Charles Darwin and Alfred Wallace

Solution:
Embryological support for evolution was also proposed by Ernst Heckel based upon the observation of certain features during embryonic stage common to all vertebrates that are absent in adult. For example, the embryos of all vertebrates including human develop a row of vestigial gill slit just behind the head but it is a functional organ only in fish and not found in any other adult vertebrates. However, this proposal was disapproved on careful study performed by Karl Ernst von Baer. He noted that embryos never pass through the adult stages of other animals. Aristotle believed in the theory of spontaneous generation while Louis Pasteur disproved it using the famous swan neck experiment. Lamarck believed in the theory of use and disuse of organs while Weismann cut the tails of new born mice for several generation and disproved their theory. The theory of evolution due to natural selection was supported by Charles Darwin and Alfred Wallace

Topic: Biology, Evolution, NEET
Which one of the following sequences represents to correct increasing order of bond angles in the given molecules?

Options:
A H2O<OF2<OCl2<ClO2
B OCl2<ClO2<H2O<OF2
C OF2<H2O<OCl2<ClO2
D ClO2<OF2<OCl2<H2O

The correct answer is:
OF2<H2O<OCl2<ClO2

Solution:
Species
OF2
OCl2
ClO2
H2O

Bond angle
103 o
111 o
118 o
104 o 28'

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which one of the following set of diseases belongs to the same category of causative agents?

Options:
A Tetanus, Typhoid, Pneumonia
B Dengue, Typhoid, Malaria
C Chikungunya, Dengue, Malaria
D Mumps, Polio, Plague

The correct answer is:
Tetanus, Typhoid, Pneumonia

Solution:
Bacterial diseases: tetanus, typhoid, pneumonia, plague, etc.
Viral diseases: mumps, polio, dengue, chikungunya, etc.
Protozoal diseases: malaria, kala-azar, sleeping sickness, etc.

Topic: Biology, Human Health and Diseases, NEET
Which one of the following set of metals deposits as anode mud during the process of electrolytic refining of copper?

Options:
A Sn and Ag
B Pb and Zn
C Ag and Au
D Fe and Ni

The correct answer is:
Ag and Au

Solution:
In the electrolytic refining of copper, anodic mud contains less electropositive metals like Ag, Au, Pt, Pd, etc and impurities like Fe, Zn, Ni, Sn, Pb etc. which are more electropositive metals pass into the solution.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which one of the following set of reproductive organs are external genitalia of male and female?

Options:
A Glans penis & Clitoris
B Scrotum & Cervix
C Bulbo-urethral gland & Bartholin's gland
D Prostate gland & Skene's gland

The correct answer is:
Glans penis & Clitoris

Solution:
Penis or glans penis of male is homologous to clitoris of female as both are highly erectile and sensitive structure.
Bartholin's gland in female is homologous to Bulbo-urethral gland of male to secrete mucus to provide lubrication.
External genitalia of female include Mons pubis, Labia majora, Labia minora, Hymen and Clitoris.

Topic: Biology, Human Reproduction, NEET
Which one of the following sets of animals belongs to a single taxonomic group?

Options:
A Cuttlefish, Jellyfish, Silverfish, Dogfish, Starfish
B Bat, Pigeon, Butterfly
C Monkey, Chimpanzee, Man
D Silkworm, Tapeworm, Earthworm

The correct answer is:
Monkey, Chimpanzee, Man

Solution:
Monkey, Chimpanzee, Man belong to mammals.

Topic: Biology, Animal Kingdom, NEET
Which one of the following sets of animals shares a four-chambered heart?

Options:
A Amphibian, Reptiles, Birds
B Crocodiles, Birds, Mammals
C Crocodiles, Lizards, Turtles
D Lizards, Mammals, Birds

The correct answer is:
Crocodiles, Birds, Mammals

Solution:
Crocodiles, Birds, Mammals shares a four-chambered heart.

Topic: Biology, Animal Kingdom, NEET
Which one of the following sets of monosaccharides forms sucrose?

Options:
A $\alpha$-D-galactopyranose and $\alpha$-D-glucopyranose
B $\alpha$-D-glucopyranose and $\beta$-D-fructofuranose
C $\beta$-D-glucopyranose and $\alpha$-D-fructofuranose
D $\alpha$-D-glucopyranose and $\beta$-D-fructopyranose

The correct answer is:
$\alpha$-D-glucopyranose and $\beta$-D-fructofuranose

Solution:
Sucrose is composed of $\alpha$-D-glucopyranose and a $\beta$-D-fructofuranose units which are joined by $\alpha, \beta$-glycosidic linkage between $\mathrm{C}-1$ of the glucose unit and C-2 of the fructose unit.

Topic: Chemistry, Biomolecules, NEET, NEET 2012 (Screening)