2. (3) Circle the molecules that are not aromatic. O: All are aromatic 23. (8) Cellulose is a glucopyranose polysaccharide with a 1,4'glycoside linkage. This molecule is not easi digested by mammals. Incomplete hydrolysis of cellulose produces cellobiose, a disaccharide. Draw the structure of cellobiose. Neatness and precision count. >

Consider the disaccharide trehalulose. CH₂OH H Н Он H он Н он H CH2 HO Н Н носн,он Он Н Part: 0/3 Part 1 of 3 Highlight the glycosidic linkage in the structure of trehalulose. Снон Н H он Н он Н Он Н CH2 но Н H HỌ/CH,OH Он H ✓

8) Consider the tetrasaccharide stachyose drawn below. Stachyose is found in white jasmine, soybeans, and lentils. Because humans cannot digest it, its consumption causes flatulence. HO How ОН OH stachyose OH HO HO OH HO OH OH OH OH «ОН a. Label all glycoside bonds. b. Classify each glycosidic linkage as a or ẞ and use numbers to designate its location between two rings (e.g., 1-4-3). c. What products are formed when stachyose is hydrolyzed with H,O"? d. Is stachyose a reducing sugar? e. What product is formed when stachyose is treated with excess CHI, Ag₂O? f. What products are formed when the product in (e) is treated with H₂O"?

Which of the following is the correct glycosidic bond linkage of the disaccharide shown?       β-(1→6) glycosidic bond     α-(1→6) glycosidic bond     α-(1→1) glycosidic bond     β-(1→1) glycosidic bond

Consider the following carbohydrates: CHO CH2OH но H. OH OH H. OH CH,OH HO HH HO OH OH OH CH-OH CH,OH %3D II Which of these are D-sugars? O All are D-sugars I and II I and IlI Il and III All are L-sugars エ

1- Please refer to the Fisher representation of the 5 monosaccharides below: ÇH2OH CHO CHO CHO CHO H- H- он H- OH OH HO HO но- H- OH HO Но- H- -OH H- H- -OH HO- OH HO H- -OH H- -OH HO HO H- OH ČH2OH ČH2CH ČH2CH ČH2CH ČH2CH D-Fructose D-Glucose L-Glucose L-Idose D-Galactose 1a- Which one(s) of the above molecules belong(s) to the subcategory of aldohexoses? and which one(s) of these molecules belong(s) to the subcategory of ketohexoses? Briefly explain your response. 1b- Which one of the above molecules is an enantiomer of D-Glucose? and which one is an epimer of L-Ildose? Briefly explain your response.

Disaccharides are joined by glycosidic bonds formed between the anomeric carbon on one monosaccharide and a hydroxyl (-OH) group of another monosaccharide. Identify the types of linkages in each of the three disaccharides. Only place three of the linkages. НО. CH₂OH CH₂OH CH₂OH HO OH OH OH OH OH CH₂OH HO. НО OH OH 0 OH B12 al OH 4 OH 0 О CH₂OH Answer Bank al + B2 OH al + al OH B14 OH о OH OH

Which of the following statements is correct regarding the structures below? CHO CHO H-OH ОН н ОН НО H НО -Н н- ОН CH₂OH CAB All are structures of D-sugars. All are structures of ketohexoses. Only CAR is a monosaccharide. 0 Only CAP is a L-sugar. Н I H CHO -ОН H-OH H-OH н- -ОН CH₂OH CAR H-OH -ОН НО-Н то н- H-OH CH₂OH CAP CH2OH to HO-H НО-н Н 1 - он CH₂OH CAT

Which of the following is true regarding the glycosidic bond between the pentose sugar and nitrogenous bases? Select all the apply. O C1 of pentose sugar is covalently bonded to N9 of purine bases O C1 of pentose sugar is covalently bonded to N3 of pyrimidine bases O C1 of pentose sugar is covalently bonded to N1 of pyrimidine bases O C5 of pentose sugar is covalently bonded to N1 of pyrimidine bases O C1 of pentose sugar is covalently bonded to N3 of purine bases O C5 of pentose sugar is covalently bonded to N9 of purine bases

13. Observe the diagrams below. Which sugar(s) is(are) epimers of xylose? Specify the carbon that is involved. HICIOH HIC-OH HIC-OH CH₂OH D-Ribose Figure 7-3 part 2 2013 of chemistry Seth Edition Five carbons HO-C-H D-Aldoses H- -OH H -C-OH -OH CH₂OH CH₂OH D-Arabinose D-Xylose H-C-OH HO-C-H H-C-OH H-C-OH 0 H-C-OH HOICIH CH₂OH D-Glucose H но- C-H HO -H H -C-OH CH₂OH D-Lyxose 14. Observe the structures below and determine: H HIC-OH CHO HOH HO-C-H HO-C-H OH- a. Which is an epimer of glucose: galactose or fructose? b. Which is a ketose of glucose? H-C-OH CH₂OH D-Galactose H н——он HOH CH₂OH D-glucose CHO он———н H- он——н он——н CH₂OH L-glucose CH₂OH C=0 HO-C-H H - C_OH -OH H-C-OH CH₂OH D-Fructose