Examine the cyclic structure of sugarls below. Which in the statements best describe the structures? * CH,OH CH,OH H H/ он H HOI он он он н These aldopentose sugars are considered as enantiomeric isomers These pair of structures are epimers to the achiral carbon number 3 O These sugars constitute to the disaccharide sucrose O These aldohexose sugars are considered as enantiomeric isomers None of the given options
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- Long explanations are not needed. Direct answers would suffice. a. Which of the following is NOT an example of structural polysaccharides? I. amylose II. cellulose III. chitin b. Which of the following is the epimer of glucose at C-2? I. gulose II. galactose III. mannose IV. fructose V. taloseDefine the term reducing sugar. What structural feature doesa reducing sugar have?Glucose and fructose are reducing sugars. Sucrose, or table sugar, is a disaccharide consisting of both fructose and glucose. Is sucrose a reducing sugar? Explain.
- Draw the structure and give the systematic name of the given disaccharides. Lactose which is also known as milk sugar: β-D-Gal(1à4)β-D-Glc, where Gal is galactose and Glc is glucose. Sucrose which is also known as table sugar: a-D-Glc (1-->2) b-D-Fru where Glc is glucose and Fru is fructose.Which of the following statements about monosaccharides is true? A. Monosaccharides are classified according to the location of their carbonyl group. B. The penultimate chiral center of a monosaccharide determines its handedness. C. If the carbonyl group of a monosaccharide is terminal then it will react positively with Barfoed's and Seliwanoff's tests. D. The cyclization of monosaccharides results to the formation of a cyclic ether. E. The existence of anomers is due to the mutarotation along the reference carbonCompare/contrast the structures of the following carbohydrate pairs: (a) D-ribose and D-ribulose (b) isomaltose and maltose (c) cellulose and amylose
- Construct the two enantiomeric forms/structure of the following monosaccharides and designate the handedness of each using D, L system: a. RibuloseWhich of the following describes lactose? A. A nonreducing disaccharide containing glucose and fructose linked by a (α1-->4) bond. B. A reducing disaccharide containing two glucose molecules linked by a (α1-->4) bond. C. A reducing disaccharide containing two glucose molecules linked by a (β1-->4) bond. D. A reducing disaccharide containing galactose and glucose linked by a (β1-->4) bond. E. A nonreducing disaccharide containing galactose and glucose linked by a (α1-->4) bond.Draw the structure of a disaccharide unit in a polysaccharide composed of d-glucose linked a(1,4) tod-galactosamine.
- In a table give three disaccharides, their respective monomers and sourceIs it alpha or beta? Is it L or D? How name is give! What is the name of the given sugar! Explain!a. Identify the disaccharide in the photo. b. the glycosidic linkage in this disaccharide is what? α (1-2) linkage β (1-4) linkage α (1-4) linkage β (1-2) linkage c.Is the disaccharide below a non-reducing sugar?