ArticlePDF Available

Difference Between Sugar and Starch

Authors:
  • The Biology Blog - WELCOME TO THE WORLD OF BIOLOGY
5/21/2017 DifferenceBetweenSugarandStarch|Definition,Structure,Characteristics
http://pediaa.com/differencebetweensugar andstarch/ 1/8
Home»Science»Biology»MolecularBiology»DifferenceBetweenSugarandStarch
DifferenceBetweenSugarandStarch
May20,2017 byLakna 4minread
0
MainDifference–SugarvsStarch
Sugar and starch are two types of carbohydrates found in
plants and animals. Three types of carbohydrates can be
identified as monosaccharides, disaccharides, and
polysaccharides.Theyaremadeupofthreeatoms:carbon(C),
hydrogen(H)andoxygen(O).Autotrophs producethesimple
monosaccharideglucosefromcarbondioxideandwaterduring
photosynthesis. The combination of two monosaccharides
produces disaccharides. Polysaccharides are formed by
combiningalargenumberofglucosemonomerstogether.The
maindifference between sugarand starch is that sugarsare
disaccharidesormonosaccharideswhereasstarchisapolysaccharide.
Thisarticleexplains,
1.WhatisSugar
–Definition,Structure,Characteristics
2.WhatisStarch
–Definition,Structure,Characteristics
3.WhatisthedifferencebetweenSugarandStarch
EXPLORE
Typeheretosearch...
EXPLORE
5/21/2017 DifferenceBetweenSugarandStarch|Definition,Structure,Characteristics
http://pediaa.com/differencebetweensugar andstarch/ 2/8
WhatisaSugar
Sweet and soluble carbohydrates are generally called sugars. Hence, both monosaccharides and disaccharides are
sugars. Monosaccharides have the general chemical formula of (CH O) . There are three common types of
monosaccharides:glucose,fructose,andgalactose.
Glucose
Glucose is the organic molecule used in the metabolism as the energy source. Hence, it is very important in
physiology,diet, and nutrition in animals. All other forms of carbohydrates are also converted into glucose during
digestion.Glucoseismorecommonlyfoundinripefruitsandvegetableslikebeetroot.
FructoseandGalactose
Fructoseisthefruitsugar.Itisalsofoundinhoney.Galactoseispresentinmammals’milk.
2 n
EXPLORE
5/21/2017 DifferenceBetweenSugarandStarch|Definition,Structure,Characteristics
http://pediaa.com/differencebetweensugar andstarch/ 3/8
Figure1:Glucose,fructose,andgalactose
Disaccharidesareformedby joiningtwomonosaccharidestogetherwith aglycosidicbond.Themost commontypes
ofdisaccharides arelactose,sucrose, andmaltose.They havethegeneralformulaofC H O .Sucroseisfoundin
sugarcaneandsugarbeet.Itisformedbythejoiningofaglucoseandafructosemoleculetogetherbyα(1→2)βbond.
Lactoseisformed by thejoiningofaglucose molecule with agalactosemoleculebya β(1→4) bond.Itisfoundin
mammals’milk.Maltose is formed by the combination oftwoglucose molecules together by a α(1→4) bond. Itis
foundincerealslikebarley.Thestructureofsucroseisshowninfigure2.
Figure2:Sucrose
WhatisStarch
Starch is the polysaccharide synthesized from glucose by
greenplantsastheir main energy store.Plantsstorestarch
in staple foods like fruits, tubers like potatoes, seeds like
rice,wheat,corn,and cassava. Starch occurs in twotypes:
amylose and amylopectin. Amylose is a linear, helical
chain,whichisformedbythejoiningofglucosemolecules
via α(1→4) bonds by the enzyme, starch synthase.
Amylopectin is formed by the branching of the amylose
chain via α(1→4) bonds by the starch branching enzyme.
Around25%of the starch in plants are amylose whilethe
rest is amylopectin. Starch is arranged into a semi
12 22 11
Tapiocastarch
Manufacturer
&Supplier
ManufacturerofTapiocaStarch
andModifiedStarchesinIndia
varalakshmistarch.com
EXPLORE
5/21/2017 DifferenceBetweenSugarandStarch|Definition,Structure,Characteristics
http://pediaa.com/differencebetweensugar andstarch/ 4/8
crystallinestructureatthestorageareas.Itisfoundinsidethegranulescalledamyloplasts.Amyloseandamylopectin
areshowninfigure3.
Figure3:Amyloseandamylopectin
DifferenceBetweenSugarandStarch
CarbohydrateTypes
Sugar:Sugarsaremonosaccharidesanddisaccharides.
Starch:Starchisapolysaccharide.
NumberofMonomers
Sugar:Monosaccharidesaremadeupofasinglemonomeranddisaccharidesaremadeupoftwomonomers.
Starch:Starchismadeupof300to1,000glucosemolecules.
Complexity
Sugar:Sugarsarelesscomplex.
Starch:Starchismorecomplexthansugars.
EXPLORE
5/21/2017 DifferenceBetweenSugarandStarch|Definition,Structure,Characteristics
http://pediaa.com/differencebetweensugar andstarch/ 5/8
Absorption
Sugar:Sugarsarereadilyabsorbedbythedigestivetractoforganisms.
Starch:Starchtakestimetobeabsorbed.
BloodGlucoseLevel
Sugar:Sugarsincreasebloodglucoselevelrapidly.
Starch:Starchincreasesbloodglucoselevelslowly.
Conclusion
Sugar and starch are carbohydrates. Monosaccharides, disaccharides, and polysaccharides are three types of
carbohydrategroups foundinnature.Monosaccharides anddisaccharidesarewater solublesubstances.Sincemono
and disaccharides are water soluble, they are sweet. Sweet carbohydrates are called sugars. Therefore,
monosaccharideslike glucose, fructose,andgalactoseas wellasthedisaccharides like sucrose,maltose,andlactose
aresugars.Starch is apolysaccharidemadeupof joining alargenumberof glucose monomerstogether.Hence,the
maindifferencebetweensugarandstarchistheircomplexityofstructure.
Reference:
1. Berg, Jeremy M. “Complex Carbohydrates Are Formed by Linkage of Monosaccharides.” Biochemistry. 5th
edition.U.S.NationalLibraryofMedicine,01Jan.1970.Web.18May2017..
2.“TypesofSugar.”MonosaccharidesandDisaccharides.N.p.,n.d.Web.18May2017..
ImageCourtesy:
1.ByOpenStaxCollege–Anatomy&Physiology,ConnexionsWebsite.Jun19,2013(CCBY3.0)viaCommons
Wikimedia
2.“Saccharose”(PublicDomain)viaCommonsWikimedia
3.“219ThreeImportantPolysaccharides01″ByOpenStaxCollege–Anatomy&Physiology,ConnexionsWebsite.
Jun19,2013.(CCBY3.0)viaCommonsWikimedia
0
EXPLORE
5/21/2017 DifferenceBetweenSugarandStarch|Definition,Structure,Characteristics
http://pediaa.com/differencebetweensugar andstarch/ 6/8
Viewallposts
AbouttheAuthor:Lakna
Lakna,agraduateinMolecularBiology&Biochemistry,isaMolecularBiologistandhasa
broadandkeeninterestinthediscoveryofnaturerelatedthings
YouMayAlsoLikeThese
Tapiocastarch
Manufacturer
&Supplier
ManufacturerofTapiocaStarch
andModifiedStarchesinIndia
varalakshmistarch.com


hilicon.com


pediaa.com

Ad
Mobile Academy


pediaa.com


smscor.com


pediaa.com


pediaa.com


pediaa.com
LeaveaComment
EXPLORE
5/21/2017 DifferenceBetweenSugarandStarch|Definition,Structure,Characteristics
http://pediaa.com/differencebetweensugar andstarch/ 7/8
Copyright©2017Pediaa.Com.
YouMayLike
DifferenceBetween
SugarandStarch
DifferenceBetween
UracilandThymine
DifferenceBetween
CytosineandThymine
DifferenceBetween
AdenineandGuanine
Comparethe
PhosphatesSugarsand
BasesofDNAand...
Comment
Name* Email* Website
PostComment
EXPLORE
5/21/2017 DifferenceBetweenSugarandStarch|Definition,Structure,Characteristics
http://pediaa.com/differencebetweensugar andstarch/ 8/8
Contact AboutUs
EXPLORE
... The difference in cation source was recorded to have influenced the rate of flocculation for all the isolates and the result has also shown that all the isolates except Klebsiella sp were stable across the three evaluated cations. The difference in flocculating activity with starch as compared to other carbon sources could be attributed to the complexity which would make its utilization harder than glucose or sucrose which are simple sugar (NHS, 2017;Lakna, 2017). ...
Article
Full-text available
Synthetic flocculants in water treatment have been reported to be detrimental to both human health and the environment. Thus, there is a constant search for bio-flocculants that is safe and addresses the effects of synthetic polymers. This study was aimed at isolating bacteria with bio-flocculating potential, their molecular identification and phylogenetic relatedness, and the optimization of their flocculating abilities from an open water (Asa River) in Ilorin Kwara State. The effect of carbon source (glucose, lactose and starch), cations (FeSO 4 , KCl and CaCl 2 ) and pH (2 to 12) was evaluated on the bio-flocculating activities of the isolates using kaolin clay. The seven (7) novel (new strains) isolates with their respective accession number from National Center for Biotechnology Information (NCBI) after molecular confirmation are Pseudomonas otitidis MTK01 (MK263227), Aeromonas caviea MTK02 (MK263228), Providencia alcalifaciens MTK03 (MK263229), Providencia sp. MTK05 (MK263230), Alcaligenes sp. MTK06 (MK263231), Klebsiella pneumoniae MTK07 (MK263232) and Klebsiella sp. MTK08 (MK263233) while Raoultella ornithinolytica MTK04 was also identified. Phylogenetic tree of relatedness showed close kin of the isolates to established bacteria sequence deposited at the NCBI GenBank. Although the flocculating rate of each isolates varied with different parameters that was used in the study, glucose was the most supportive followed by lactose and starch, CaCl 2 was most supportive cation followed by KCl and FeSO 4 while pH 12, 6, 8, 10, 2 and 4 were the order of decreasing flocculating rate of the medium. This study has reported the presence of eight (8) bio-flocculating bacteria (out of which 7 are new strains of bacteria) in an open water which has been further optimized for effective flocculating rate and thus provides an ecofriendly and harmless flocculants source that can be employed in water treatment procedures.
Complex Carbohydrates Are Formed by Linkage of Monosaccharides
  • Jeremy M Berg
Berg, Jeremy M. "Complex Carbohydrates Are Formed by Linkage of Monosaccharides." Biochemistry. 5th edition. U.S. National Library of Medicine, 01 Jan. 1970. Web. 18 May 2017..