Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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- isomaltose is a disaccharide which can be obtained by enzymatic hydrolysis of amylopectin. Deduce the structure of isomaltose from the following data: a. The hydrolysis of 1 mole of isomaltose with acid or alpha-glucosidase yields 2 moles of D- glucose. b. Isomaltose is a reducing sugar c. Isomaltose is oxidized with bromine water to isomaltonic acid. Insomaltonic acid methylation followed by hydrolysis yielded 2,3,4,6-tetra-O-methyl-D-glucose and 2,3,4,5- tetra-O-methyl-D-gluconate acid. d. Isomaltose methylation itself followed by hydrolysis to produce 2,3,4,6-tetra-O-methyl- D-glucose and 2,3,4-tri-O-methyl-D-glucose. Describe according to the four points abovearrow_forwardIndicate 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-threosearrow_forwardWill the synthesis of 9,10-dihydroanthracene-9,10-α,β-succinic anhydride via Diels-Alder reaction occur faster under photochemical conditions? Explain.arrow_forward
- Consider olive oil, an oil with a high percentage of fat derived from oleic acid (otherwise known as cis[18:1] fatty acid). a, Explain why such a structure may allow olive oil to be one of the "healthier" oils? b, why such a structure may allow olive oil to be a liquid at room temperature, while butter and lard are solid at room temperature? c, why such a structure may cause olive oil to be prone to oxidative damage upon exposure to air and heat?arrow_forwardIn 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?arrow_forwardD-Talose is a C2 epimer of D-galactose. Using the Fischer projection structure, draw the product of reaction of D-talose with the given reagent or enzyme and write the systematic name of the product. 1. NaBH₁ 4.2,4-DNP 2. Reaction with oxidase to form the alduronic acid 3. Reaction with kinase at C3 5. Reaction with aminotransferase and then acetyltransferase at C4arrow_forward
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