(a)
To draw: The Haworth projection of Gentiobiose.
Introduction: Gentiobiose is the common disaccharide observed in gentians and other plants. In case of the Haworth projection, sugar is represented either as pentagon or hexagon with bonds coming off the ring. Gentiobiose is composed of two subunits of glucose linked to each other with the help of glycosidic bonds oriented in beta direction.
(b)
To draw The Haworth projection of Raffinose.
Introduction: Raffinose is the trisaccharide made up of glucose, galactose, and fructose and commonly found in sugar beets In case of the Haworth projection, sugar is represented either as pentagon or hexagon with bonds coming off the ring. Raffinose is made up of one molecule of α –D- galactose, α –D- glucose and β-D fructose linked by a glycosidic bond.
(c)
To draw The Haworth projection of dextran having one branch point.
Introduction: Bacteria produce certain polysaccharides called as Dextrans. In case of the Haworth projection, sugar is represented either as pentagon or hexagon with bonds coming off the ring. Dextrans are
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Becker's World of the Cell (9th Edition)
- cotton. Which aspect of the structure of cellulose accounts for its strength? Cellulose is an abundant structural polysaccharide found in plant cell walls, wood, and interchain hydrogen bonding between extended molecular chains repeating unit of N-acetylglucosamine a(1→4) linkages between glucose units branches that occur every 12-30 residues forms a helical conformation in water Which of the following is not correct about chitin? fundamental constituent of the exoskeletons of crustaceans, insects, and spiders b) chitin chains form extended ribbons that pack side-by side a) similar to cellulose but with repeating units of N-acetyl-D-glucosamine c) d) found mainly in the liver in humans, making up as much as 10% of liver mass stacked sheets of chitin strands are stabilized by intrastrand, interstrand, and intersheet hydrogen bondsarrow_forwardLong explanations are not needed. Direct answers would suffice. a. Carbohydrates can function in livings systems as any of the following, EXCEPT: i. storage of energy ii. structural and mechanical support iii. aid in cell surface recognition iv. storage of genetic information v. source of ATP when catabolized b. Which of the following structural representations best describes an open-chain monosaccharide, either an aldose or a ketose? i. Fischer projection ii chair conformation iii boat conformation iv. Haworth projectionarrow_forwardCyclic forms of D-glucose: Haworth formula The furanose and pyranose forms of D-glucose can be presented using Haworth formula. The following templates are used for this formula. Note the numbering of the carbon atoms and the anomeric carbon (this carbon defines the alpha and beta isomer). Furanose template (furan) Pyranose template (pyran) anomeric carbon anomeric carbon Compare the Fisher and Haworth formula of D-glucofuranose and D-glucopyranose. Notice that the groups attached to C-1, C-2, and C-3 on the left side of the Fisher formula are written above the plane of the furanose template. Fisher formula Haworth formula H FOH H-2 HOH,č 5 -OH FOH- H HO-3H 4 он H 1 H-4 H-5 H OH 3 6 CH2OH H OH Alpha-D-glucofuranose Alpha-D-glucofuranose HOH2C- он OH но H FOH- OH Но H H. OH H ČH2OH Beta-D-glucofuranose Beta-D-glucofuranosearrow_forward
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- BiochemistryBiochemistryISBN:9781305577206Author:Reginald H. Garrett, Charles M. GrishamPublisher:Cengage Learning