1. Below are two isomers of mannose. Classify this sugar based on sugar number. Is this sugar an aldose or a ketose? Indicate which sugar is in the D conformation and which is in the L confirmation. Are these sugars enantiomers or diastereomers? H но-н но- -Н Н- -ОН Н- -ОН CH2OH .H I Н- Н- HO-H Но -ОН -ОН -Н CH₂OH =1
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- Indicate whether each of the following disaccharides is a reducing (R) or nonreducing (NR) sugar by the criterion of reaction with Fehling’s solution. (a) Glcα(1 → 2)Frucβ (b) Galβ(1 → 4)Glc (c) Glcα(1 → 1)Glcα (d) Glcα(1 → 4)Glc (e) Glcβ(1 → 6)GlcStrictly speaking, "Hydrates of Carbon" pertains to the specific chemical formula of most Carbohydrates which is (CH2O)n. In this regard, what instances can be identified where in this chemical formula has exemptions? a.Lactate which is considered a non-sugar following the formula. b.Acetate which a non-sugar being considered as a sugar molecule. c.Rhamnose being a 5 carbon sugar molecule. d.Lactose in its form and configuration.a. Is the disaccharide below a non-reducing sugar? yes or no b. The glycosidic linkage in the disaccharide is what β-(1-2) linkage, α-(1-2) linkage, β-(1-4) linkage, or α-(1-4) linkage? c. The products of hydrolysis of the disaccharide (which of the ff.) α-galactose and α-ribose α-glucose and α-fructose α-fructose and α-galactose α-glucose and α-galactose
- 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 carbonAll sugar residues are in their D-isomeric forms. The first sugar residue is a(n): (select any/all answers that apply) A. hexose. B. pentose. C. furanose. D. pyranose. E. aldehyde when drawn in its linear form. F. ketone when drawn in its linear form.1. Is the disaccharide reducing? Yes or no and why. 2. Will the disachharide react positively with benedicts reagent? Yes or No. 3. What is the specific glycosidic linkage of the disacchride? A. alpha-1,4 glycosidic linkage B. beta-1,3 glycosidic linkage C. alpha-1,3 glycosidic linkage D. beta-1,4 glycosidic linkage
- Which 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.3. One of the triacylglycerols found in corn oil contains palmitic acid, linoleic acid, and linolenic acid. During the production of spreadable margarine, all of the double bonds in this triacylglycerol are converted from cis to trans isomers. Linoleic acid: CH3(CH2)4CH=CHCH2CH=CH(CH2)7COOHLinolenic acid: CH3CH2CH=CHCH2CH=CHCH2CH=CH(CH2)7COOH Palmitic acid: CH3(CH2)14COOH a. Identify the unsaturated fatty acid(s) listed above and provide the associated omega designation. b. Draw an accurate representation of the structure of the triacylglycerol present in spreadable margarine. Circle all ester bonds in the structure you have drawn.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?