6. To draw the structures of final product and A Br 1. LDA 1. BuLi A 2. Mel 2. Br

Consider the tetrasaccharide stachyose drawn below. Stachyose is found in white jasmine, soybeans, and lentils. Because humans cannot digest it, its consumption causes flatulence.a. Label all glycoside bonds.b. Classify each glycosidic linkage as αα or ββ and use numbers to designate its location between two rings (e.g., 1→→4-ββ)-c. What products are formed when stachyose is hydrolyzed with H33O++?d. Is stachyose a reducing sugar?e. What product is formed when stachyose is treated with excess CH33I, Ag22O?f. What products are formed when the product in (e) is treated with H33O++?

Describe what each reagent does in SDS Page 1. Sodiun dodecyl sulfate 2. Polyacrylamide 3. Mercaptoethanol

Answer the following questions using the Haworth structure drawn below. Но. CH2 HO, ОН OH ОН a. Identify this monosaccharide. b. Is this the a or ß isomer. c. In solution the cyclic structure above can open and close to form the other isomer. Which structure below is the other isomer that is present in solution? I. II. III. CH2OH O OH CH2OH но -СН, о OH OH OH но CH2 -OH OH ÓH ÓH OH

U3acclanue. b. simple sugar. с. disaccharide. d. polysaccharide. e. oligosaccharide. 12. Which of the following glycosidic linkages does the sugar shown below contain? CH2OH CH2OH OH OH OH OH OH OH a. B-(2→4) b. a-(1→4) с. В-(1—4) d. a-(2-4) e. a-(2→6)

In addition to have polyalcohol groups, what functional group(s) do monosaccharides have? O a. aldehyde group O b. both ketone and aldehyde groups O C. ether group O d. either ketone or aldehyde group e. ketone group Jump to... You are logged in as Alanie Fontenot (Log out) CHEM 1001/LEC/001X-2021/SPRING/SEM

Lit CH3I LDA) CH3I C12 Hcl /H2O LDA 2) Br

E (+)-cyanthiwigin-AC F MeMgCl H₂C*** g H₂C CH3 CH3 G PhSSO₂Ph 1. a. IBX b. MMP c. K₂CO3 H₂C H Į HCI SPh CH3

B4. CH₂OH H H но. H CH₂OH OH H AR Zeval O OH H H HO H O H OH OH H OH H OH H OH OH/ H H Lactose H OH НО. H OH H H Sucrose The structures of the disaccharides lactose and sucrose are shown above. a) Identify the monosaccharide residue that is common to both disaccharides. OH b) Identify and explain the diastereomeric relationship between two of the monosaccharide units in these sugars. c) Draw a simple mechanism for the lactase-catalyzed cleavage of the glycosidic bond in lactose. d) Explain why lactose and sucrose give different results in the Benedict's test.

An enzyme that is chemospecific (group specific) will. Select one: O a. specifically attack one end of a particular bond in preference over the other. O b. recognise only one functional group among several identical functional groups O c. distinguish between stereoisomers, recognising one pair of enantiomers or a single enantiomer.