The sugar alcohol often used in “sugarless” gums and candies is L-sorbitol. Much of this alcohol is prepared by reduction of D-glucose. Compare these two structures and explain how this can be.
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1The sugar alcohol often used in “sugarless” gums and candies is L-sorbitol. Much of this alcohol is prepared by reduction of D-glucose. Compare these two structures and explain how this can be.
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- 1. provide three reasons why most of the research on carotenoids concentrates on b-carotene. 2. draw the retinol ester that has stearic acid as the carboxylic acid portion of its structure.4. Draw the condensed structural formula for the triacylglycerol made from 3 saturated fatty acids that are 24 carbons long Using diagram from 1 as the reactant, draw the full equation (using condensed structural formulas) for this triacylglycerol undergoing saponification, using NaOH6 The following structure is part of the lipopolysaccharide found on the outside of vibrio cholerae. I know that the glycosidic linkage connecting residues B and C and the glycosidic linkage connecting residues C and D are both alpha, but what are the numbers that follow the alpha? Ex: alpha- ? -> ?
- 1. As much as 2% by mass fatty acids may be found bound to albumin tightly but reversibly. What intermolecular forces do you think are important for albumin binding to fatty acids?2. Draw the condensed structural formula for the triacylglycerol made from 3 saturated fatty acids that are 18 carbons long. Using your diagram from #2 as the reactant, draw the full equation (using condensed structural formulas) for this triacylglycerol undergoing enzyme hydrolysis, using lipase.1. Why is β-carotene less polar than chlorophyll b? Mention any TWO functional groups which make chlorophyll b more polar than carotene. 2. What is the degree of unsaturation of a β-carotene molecule?
- 6 (a) A decapeptide has the following amino acid composition: Ala2 , Arg, Cys, Glu, Gly, Leu, Lys, Phe, Val Partial hydrolysis yields the following tripeptides: Cys-Glu-Leu + Gly-Arg-Cys + Leu-Ala-Ala+ Lys-Val-Phe + Val-Phe-Gly. Reaction of the decapeptide with 2,4-dinitrofluorobenzene yields 2,4-dinitrophenylysine. From the experimental data, deduce the primary structure of the decapeptide. (b) Suggest a scheme you will follow to synthesize the dipeptide Ala-Gly1. What is the reason why sucrose is a non reducing sugar? 2. In glycosidic linkage formation between monosaccharide units, discuss how products were formed.8. The chemical structure of Coenzyme A contains the following except— a phosphoanhydride moiety. a β-mercaptoethylamine residue. a lipoic acid residue. a pantothenic acid residue. an adenosine-3’- phosphate.
- 8. Match each of the following amino acids with the intermediate needed for its synthesis.(a) 3-Phosphoglycerate 1. glutamate 2. serine 3. asparagine (b) oxaloacetate 1. glutamate 2. serine 3. Asparagine1. If Ser 80 was replaced with Arg what kind is the change in the bond type between these two molecules? Will this change be more or less stable. Explain1. A monosaccharide contains four carbon atoms and contains an aldeyde group. What is the classification of the sugar based on the information given? If it contains a ketone group instead of an aldehyde retaining its number of carbon atoms, what is now its classification?