Week 7 Carbohydrates Lectures 18 19 Concepts Recognize various types of carbohydrates including monosaccharides disaccharides polysaccharides hexose pentose aldose ketose Recognize the structures of the above with alpha and beta Recognnize hemiacetal and acetal functional groups in the various saccharides Ques 1 List 3 disaccharides and list the monosaccharides present in each Ques 2 List 3 polysaccharides and state where they can be found in nature Ques 3 Which hexose is also a ketose Ques 4 For the two structures below CH2OH H O OH H OH H H HO H OH CH2OH HO OH H OH H OH H H OH a Identify glucose and galactose b Identify the alpha and beta hemiacetal OH s Review Combination Reactions 14 Hemiactal Synthesis Alcohol aldehyde or ketone hemiacetal 15 Acetal Synthesis ether synthesis Alcohol hemiactal acetal water Make a ring 4 hydroxypentanol Above hemiacetal with ethanol Ques 5 Identify the alpha and beta glucose and the alpha and beta galactose in the structures above Ques 6 a Which structure is alpha and beta fructose b Which structure A or C is a aldose and a pentose c Which structure B or D is a ketose and a hexose Ques 7 Write the complete synthesis reaction starting with the monosaccarides for the formation of maltose sucrose Ques 8 a Which structure is maltose And which is lactose b Which arrow letter points to an alpha acetal or glycosidic bond c Which arrow letter points to an beta acetal or glycosidic bond d Which arrow letter points to an alpha anomeric carbon anomeric carbon an alpha Ques 9 a Which structure is sucrose fructose b Which structure is glucose c Which arrow letter points to a alpha acetal or glycosidic bond d Which arrow letter points to a beta anomeric carbon Ques 10 List the di or polysaccharides with alpha acetal linkages Same for beta acetal linkages Ques 11 What are the differences and similarities for starch glycogen and cellulose Ques 12 H CH2 OH O H H OH H OH B 1 OH H OH OH A 2 H H 4 CH2 OH O H OH H O H H OH CH 2 OH O OH H OH H H 5 H OH OH O H H H H CH2 OH CH2 OH OH H H OH C OH OH H 3 CH2 OH O D OH a The common names for structures A B C are abd give the reason for your choices A B C b Which structure s is a hexose c List the arrow numbers which point to alpha OH anomeric carbons d List the arrow numbers which point to beta OH anomeric carbons e List the arrow numbers which point to beta acetal linkages f Put a circle around ALL hemiacetal groups in ALL structures g Which structure is a ketose A pentose
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