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assign aboslute configuration and indicate if chrial, achiral, meso.
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- The structure of 4 isomers of an aldotetrose carbohydrate are given. 1) select every structure that is a diastereomer of structure D A, B, or C? 2) select every structure that is a enantiomer of structure C D, B, or A? 3) select every structure that is a stereoisomer of structure D A, B, or CDraw a diagram of the linear and ring structures of glucose. Show the biochemical mechanism of cyclization of each and name the resultant ring – including the ring type & anomeric carbon designation. Draw and name an amine version, reduced version, and oxidized version, either in ring or Fisher projection.Draw the structure of: (a) a polysaccharide formed by joining D-mannose units in 1→4-β- glycosidic linkages; (b) a polysaccharide formed by joining D-glucose units in 1→6-α- glycosidic linkages. The polysaccharide in (b) is dextran, a component of dental plaque.
- a) Draw structural formulas for the two monosaccharides that result when structure III istreated as shown below. (b) Draw the monosaccharide that results when product A from the previous step (Q1a) istreated with Br2/H2O. (c) Draw the monosaccharide that results when product A from the previous step (Q1a) istreated with 1.NaBH4 / 2. H2O.Which of the following saccharides has INCORRECT paired description/s? * D-mannose: Monosaccharide: Prevents UTI Cellobiose: Disaccharide: With 2 glucose units Heparin: Acidic polysaccharide: Blood coagulant N-acetyl-galactosamine: Amino sugar: Present in type-A blood Keratin sulfate: Structural Polysaccharide: Most heterogenous GAGSShow the linkages between a trisaccharide with the sequence GleA-GlcA-GICA. The trisaccharide has an al-→4 glycosidic linkage between the first and second \GlcA monosaccharides. The trisaccharide has a f1-4 glycosidic linkage between the second and third GlcA monosaccharides. Show stereochemistry using wedge (upward) or dash (downward) bonds. Select Draw Rings More Erase COOH соон соон it OH OH он он он
- Lactose is a disaccharide in which a glycosidic linkage connects the monosaccharides galactose and glucose. OH НО OH (a) Identify the glycosidic linkage and the acetal carbon in lactose. (b) What type of glycosidic linkage does lactose have (i.e., is it 1,1'-, 1,2'-, etc., and is it a or B)? (c) People who are lactose intolerant are deficient in the enzyme lactase, and therefore cannot efficiently break down the disaccharide into its monosaccharides. When lactose is treated with aqueous acid, however, this hydrolysis can take place, though relatively slowly. Draw the complete, detailed mechanism and the products of the acid-catalyzed hydrolysis of lactose. Но ОН НО ОН ОН LactoseLabel attached stereogenic center as R or S.Which statement about saccharides is correct? (A). Alpha anomers are more common than beta anoomers. (B). Two monosaccharides can form a disaccharide and oxygen. (C). Polysaccharides with alpha or beta glycosidic linkages have the different properties. (D). Disaccharides can be cyclic or acyclic.
- Draw the structure of: (a) a polysaccharide formed by joining D-mannose units in 1->4-ß-glycosidic linkages; (b) a polysaccharide formed by joining D-glucose units in 1->6-a-glycosidic linkages. The polysaccharide in (b) is dextran, a component of dental plaque.---is found in plants, wood, and cotton. It's structure contains repeating units joined with 1-4-β-glycosidic linkage. Question 1 options: cyclobutane fructose cellulose glucoseDraw the structures (using chair conformations of pyranoses) of the following disaccharides.(a) 4-O-(a-d-glucopyranosyl)-d-galactopyranose(
