The following structure is D-sorbose. Which reagent will oxidize D-sorbose? CH2OH C = 0 Н-С-ОН НО -С - Н Н-С-ОН CH2OH Benedict's reagent O None of the above Sodium hydroxide Tollen's reagent Barfoed's reagent
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- what is the conjugate acid for the following reaction? HC2HO4 + H2O <--> H3O+ + C2HO4- A)C2HO4- B) HC2HO4 C)H2O D) H3O+A decapeptide has the following acid composition; Al2,Arg,Cys,Glu,Leu,Phe,Val Partial hydrolysis yield the following tripeptides; Cys-Glu-Leu+Gly-Arg-Cys+Leu-Ala-Ala+Lys-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. Suggest a scheme you will follow to synthesize the dipeptide Ala-Gly.An unknown carbohydrate gave a brick red precipitate when tested with Fehling’s reagent, turned red when reacted with Seliwanoff’s reagent, and quickly gave a red precipitate when reacted with Barfoed’s reagent. What conclusions can be made about this carbohydrate?
- Which of the following classifications apply to the formation of 3-hydroxybutyrate from acetoacetate?(a) Condensation (b) Hydrolysis(c) Oxidation (d) ReductionDefine the following terms:a. alditolb. enediolc. epimerizationd. acetale. ketalAn unknown carbohydrate gave a brick-red precipitate when tested with Fehling’s reagents, turned red when reacted with Seliwanoff’s reagent, and quickly gave a red precipitate with Barfoed’s reagent. What conclusion can be made about this carbohydrate?
- Which of the following shorthand names best characterizes the following disaccharide? a. Glc (β1→4)Gal b. Gal (β1→4)Glc c. Gal (α1→4)Glc d. Glc (α1→4)GalIn solution, glucose exists predominantly in the cyclic hemiacetal form, which does not contain an aldehyde group. How is it possible for mild oxidizing agents to oxidize glucose?What is the isoelectric point of casein? Please choose one correct answer only. A. pH 6.6 B. pH 5.6 C. pH 4.6 D. pH 3.6 E. None of the given options
- What are the hydrolytic products of sucrose? ________________________________________________________________________________________________________________________________________ Compare the reducing properties between unhydrolyzed and hydrolyzed sucrose. ________________________________________________________________________________________________________________________________________ Why is hydrolysis of sucrose also known as specific sucrose test? ________________________________________________________________________________________________________________________________________ Does the product of starch hydrolysis still contain polysaccharides? What test could have done to confirm this? ________________________________________________________________________________________________________________________________________ What enzyme in the human body can hydrolyze starch?…Ribulose is a ketopentose with the anomeric C on C-2. Will this monosaccharide reduce Benedict’s reagent? Why?Indicate whether the following pairs of monosaccharides are aldoses or ketoses. a. D-altrose & D-xylose b. D-arabinose & D-glyceraldehyde c. D-erythrulose & D-psicose d. D-talose & D-gulose e. dihydroxyacetone & D-tagatose f. D-idose & D-threose
