For the disaccharide shown below answer the following questions. CH2OH H. H H OH H. НО H OH HOCH, OH CH;OH H H OH H a. Identify this disaccharide. Do not worry about alpha, beta, D or L notation. b. What type of glycosidic bond links the monosaccharide units together? Be sure to include alpha, beta, and numbers if appropriate and in the correct order. c. Write the names of the two monosaccharide units produced by hydrolysis of this disaccharide. Be sure to include alpha, beta, and D appropriately in the names and in the correct order.

1. Draw the structure of a glucose molecule in hemiacetal (closed ring) form. Be sure to have the -OH groups in the correct orientation. What is the difference between alpha-D- glucose and beta-D-glucose? Indicate with chemical structures. α-D-Glucose B-D-Glucose 2. Why is glucose called a reducing sugar? Draw a chemical structure that clarifies your answer.

Observe carefully the structure below and choose the correct answer. Note "a through e ndicate carbon positions of this monosaccharide. OH н но HỌ HOH,C\ CH.OH ÕH H The structure shown in the figure above represents a A. glucopyranose B. ribofuranose C. myo-inositol D. fructofuranose O E. glucofuranose

12 CH2OH 1 H H 10 OH H H OH 9 6 H OH CH2 O. H H 4K OH OH 1 H H 12 OH isomaltose OH 3 a. Determine any acetal and hemiacetal in isomaltose. Carbon 7 is the acetal carbon. Carbon 1 is the hemiacetal carbon. b. Determine the numbering of each monosaccharide ring. The lower monosaccharide is numbered 5,4,3,2,1 v. The upper monosaccharide is numbered 7,8,9,10,11 c. Classify the glycosidic linkage as a or ß, and determine its location. The glycosidic linkage is B The linkage is 6 → 7. V d. Is the hemiacetal drawn as an a or ß anomer? The hemiacetal is a 00

The following trisaccharide derivative is important to human health.The A ring is?

2. Classify the following carbohydrates as monosaccharides, disaccharides, or polysaccharides (EOCQ 54) CH,OH C-0 H CH,OH 0. a. H. ОН Н H OH HO C-C CH,OH OH OH H H-C-OH b. HO-C-H Н-С—ОН Н-С—ОН CH,0H HOCH, 0 CH,OH С. Но H. OCH, CH, ОН CH,OH CH,OH CH,OH H H H C-O H C-0 H. ОН Н C-C C-0 H H d. ОН Н 141, ОН Н C-C C-C H. OH H OH OH

The following trisaccharide derivative is important to human health. What ever the A ring is called, it is linked to the B ring as ?-0-(A Ringyl)-B ringly-C ring? но но но B но A он O a. 5-0 оБ. 1-0 O c. 6-0 O d. 3-0 O e. 2-0 O f. 4-0

Which monosaccharide is a-glucose? CH,OH CH,OH CH,OH CH,OH H. O. H. H. OH H. OH H. HOH H H. HO. HO. H. HO H. OH OH H. HO. H. OH HO H. OH H. H. OH H. H. H. H. в OD OB C. O A A.

Observe carefully the structure below and choose the correct answer. Note: "a through e" indicate carbon positions of this monosaccharide. OH HOH,C HQ CH,OH ÓH H The configuration around which carbon atom shown in the figure above determines whether this is a D or an L sugar A. a B. b OCc. OD. d E. e

HW11 #22