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- Which of these is an ketohexose? a) fructose b) glucose c) ribose d) erythrose Which of these is a constitutional isomer of d-glucose? a) fructose b) galactose c) l-glucose d) ribose Which of these is an enantiomer of d-glucose? a) d-fructose b) d- galactose c) l-glucose d) d-ribose Which of these is a diastereomer of d-glucose? a) d- fructose b) d-galactose c) l-glucose d) d-riboseWhich of the following describes lactose? A. A nonreducing disaccharide containing glucose and fructose linked by a (α1-->4) bond. B. A reducing disaccharide containing two glucose molecules linked by a (α1-->4) bond. C. A reducing disaccharide containing two glucose molecules linked by a (β1-->4) bond. D. A reducing disaccharide containing galactose and glucose linked by a (β1-->4) bond. E. A nonreducing disaccharide containing galactose and glucose linked by a (α1-->4) bond.a. Is the disaccharide below a non-reducing sugar? yes or no b. The glycosidic linkage in the disaccharide is what β-(1-2) linkage, α-(1-2) linkage, β-(1-4) linkage, or α-(1-4) linkage? c. The products of hydrolysis of the disaccharide (which of the ff.) α-galactose and α-ribose α-glucose and α-fructose α-fructose and α-galactose α-glucose and α-galactose
- Which is true of reducing disaccharidess: a) One sugar has an unlinked anomeric carbon b) the anomeric carbons of both sugars are linked c) both sugars are ketoses d) one sugar is a ketose and the other is an aldose Amylose differs from amylopectin in that amylose is: a) branched b) unbranched c) required in the diet d) found only in bacteria The structure of glycogen most closely resembles that of: a) cellulose b) amylose c) amylopectin d) egg albumin The structure of cellulose differs from that of amylose in which way? A) cellulose uses fructose while amylose uses glucose b) cellulose has branches while amylose does not c) amylose has branches while cellulose does not d) cellulose has beta-links while amylose has alpha links The following sugar is commonly found in nature: a) L – fucose b) L-glucose c) L-ribose d) L – galactose Hyaluronic acid is classified as a: a) peptidoglycan b) ketohexose c) glycosaminoglycan d)…Figure 3.5 What kind of sugars are these, aldose or ketose?An example of a monosaccharide is ________. a. fructose b. glucose c. galactose d. all of the above
- Alkaline hydrolysis of one molecule of triacylglycerol yields _________ a. three molecules of glycerol and three moles of fatty acids b. three moles of glycerol and one mole of fatty acids c. one molecule of glycerol and three molecules of sodium salt of fatty acid d. three molecules of glycerol and one molecule of sodium salt of fatty acid1) Please list all glycosidic linkages between each monosaccharide units. For example, α(1→4)2) Please discuss whether these oligo/polysaccharides would be reducing or non-reducing sugar. Remember to state your reasoning in complete sentence.What would happen to the functionality of cholic acid if 3 additional hydroxyl groups were added to the side of the molecule that usually has none? (In other words, there would be 6 hydroxyl groups evenly distributed around the molecule. A. There would be more thorough (better) digestion of fats. B. It would mix with the watery phase of chyme. C. It would mix with lipids in the fatty phase of chyme. D. Chemical digestion of lipids would be less effective. E. Both choices A and B are correct. F. Both choices B and D are correct.
- Which of the following statements best describes glucose? a. It is an aldohexose. b. It is produced from dietary starch by the action of α-amylase. c. It is utilized in biological systems only in the L-isomeric form. d. It is a disaccharide.Although the first two carbons of fructose and glucose are identical in structure to DHAP and GADP (from glycolysis), DHAP and GADP equilibriate on their in solution to favor the ketone over the aldehyde, while fructose and glucose do not. Why? a)The larger size of the molecule sterically hinders the isomerization b)The larger sugars have more OH groups which hydrogen bond and disrupt isomerization c)The larger sugars cyclize, and there is no carbonyl to isomerize in the cyclic form d)The larger sugars cyclize, and in the cyclic form the hydrogen bonding is very strong e)The larger sugars are less soluble in water than the smaller sugarsBriefly describe the structural differences for each pair listed: A) Glycogen and Cellulose B) Lactose and Sucrose
