1. IMS Department of Biochemistry Phase I Lecturer : Dr.B.Raghu Carbohydrate chemistry - Tutorials I . Multiple Choice Questions: Choose the correct answer 1.The carbon atom involved in the osazone formation A. C1 and C2 B. C2 and C3 C. C3 and C4 D. C5 and C6 2. Glucose and mannose are epimers. This means that A. they are mirror images of each other B. one is a pyranose, the other a furanose C. they rotate plane-polarized light in opposite directions D. they differ only in the configuration of one carbon atom.

2. 3.Glycogen is most accurately described as a A.straight chain polymer of glucose linked by  1 4 glucosidic linkages B.straight chain polymer of glucose linked by  1 4 glucosidic linkages C.branched polymer of glucose linked by  1 4 &  1 6 glucosidic linkages D.branched polymer of glucose, glucuronic acid and glucosamine 4. Glucose is a ( an ) A.oligosaccharide B.aldohexose C.aldopentose D.ketohexose 5. A carbon atom in a molecule becomes an asymmetric centre when it bears A.three different substituents B.a pair of like and a pair of unlike substituents C.a double bond D.four different substituents

3. 6. Amylopectin is A.a branched polymer of glucose B.a linear polymer of glucose C.one of the mucopolysaccharides D.an animal starch 7. and  forms of D-glucose are referred to as A.epimers B.anomers C.enediols D.tautomers 8.Which of the following does not give a positive test for a reducing sugar ? A.Ribose B.Galactose C.Maltose D.Sucrose

4. 9.The non-carbohydrate moiety found in glycosides is known as A.glycoprotein B.mucoprotein C.apoprotein D.aglycone. 10.Cellulose is a A. Branched polymer containing  1  4 and  1  6 glycosidic linkages B. straight chain polymer consisting of  1  4 glycosidic units C.Polymer containing glucose, galactose and glucosamine D.Mucopolysaccharide 11.In order that a compound possesses optical activity it must be A.colored B.symmetrical C.inorganic D.asymmetric

5. 12.Hydrolysis of sucrose yields A.galactose and glucose B.maltose and glucose C.fructose only D.fructose and glucose 13.Starch and glycogen are both polymers of A.fructose B.Glucose-1-phosphate C.Mannose D.Glucose 14.Which of the following is not a carbohydrate ? A.Amylose B.Hyaluronic acid C.Heparin D.Palmitic acid

6. 15.The predominant carbohydrate of muscle is A.D-fructose B.D-glucose C.Lactose D.Glycogen 16.Lactose is also called A.blood sugar B.invert sugar C.milk sugar D.animal starch 17.An example of pentose is A.galactose B.mannose C.ribose D.fructose

7. 18.An example of hexose is A.ribose B.ribulose C.xylulose D.mannose 19.Mutarotation refers to A.enediol formation B.Epimerisation of glucose to galactose C. interconversion of D & L sugars D. interconversion of  &  forms of sugars with change in optical activity 20.A mucopolysaccharide with blood anticoagulant activity is A.chondroitinsulpahte B B.chondroitinsulphate D C.keratansulphate II D.Heparin

8. II. Short Answer Questions: Epimers Anomers Aminosugars Deoxysugars Glycosidic bond Why sucrose is a nonreducing sugar. III. Short notes: Mucopolysaccharides. Mutarotation. Glycosides. IV. Long Answer Questions: 1. Describe the classification of carbohydrates with suitable example.