Library
Chemistry of Carbohydrates- Viva Questions
Q.1- Choose the odd one out
Heparin, Heparan, Dermatan, Dextran                Â
(Dextran)
Q.2- Choose the odd one out
Starch, Glycogen, Chitin, Inulin                     Â
(Chitin)
Q.3- Which out of the following dextrins do not give color with iodine
Achrodextrins, Erythrodextrins, Amylodextrins              Â
(Achrodextrins)
Q.4- Name a non-sulfated Heteropolysaccharide        Â
(Hyaluronic acid)
Q.5- Which heteropolysaccharide is used as an anticoagulant    Â
(Heparin)
Q.6- Which sugar acid is used for the detoxification of the foreign compounds?
(Glucuronic acid)
Q.7- Which monosaccharide is used as the preferred source of energy for the brain cells?
 (Glucose)
Q.8- Which monosaccharide is used as a source of energy for the spermatozoa?
(Fructose)
Q.9- Which disaccharide is an intermediate in the hydrolysis of starch?
(Maltose)
Q.10- Which monosaccharide is optically inactive? Â Â Â Â Â Â Â
(Dihydroxyacetone)
Q.11- What is odd out of the following four
Glucose, Galactose, Mannose, and Fructose            Â
(Fructose)
Q.12- Choose the ketopentose-
Ribose, Xylose, Xylulose and Arabinose               Â
(Xylulose)
Q.13- Name a six-membered sugar alcohol       Â
(Sorbitol, Mannitol or Galactitol)
Q.14- Name a sugar acid                    Â
(Gluconic acid)
Q.15- Name an amino sugar-acid               Â
(Neuraminic acid)
Q.16- Name an intracellular polysaccharide       Â
(Heparin)
Q.17- D and L isomers differ from each other by orientation around which C atom?
(Penultimate carbon, farthest from the most oxidized C atom)
Q.18- Alpha and Beta anomers differ in orientation around 5 th carbon atom in a hexose- True or false? Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
(False)
Q.19- Malt sugar is————————? Â Â Â Â Â Â Â Â Â Â Â
(Maltose)
Q.20-Out of Lactase and Cellulase which enzyme is absent in human beings?
(Cellulase)
Q.21- Mucic acid is produced from—-? Â Â Â Â Â Â Â Â Â Â
(Galactose)
Q.22- Give an example of Glycosylamine              Â
(Ribosylamine)
Q.23- Name a sugar alcohol with five carbon atoms      Â
(Ribitol)
Q.24- Powder-puff shaped crystals are formed by—— Â Â Â Â
(Lactose)
Q.25- Name two nonreducing sugars                Â
(Sucrose and Trehalose)
Q.26- Which test is used to differentiate between aldohexose and ketohexose?                                                                          Â
(Seliwanoff test)
Q.27- Benedict’s test is more sensitive than the Fehling test. True or false?
 (True)
Q.28- Glycogen is stored mainly in muscles. True or false? Â Â
(False)
Q.29- Name a Cardiac Glycoside               Â
(Digitalis)
Q.30- What is milk sugar? Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
(Lactose)
Q.31- Name the product of the reaction of strong acid on a pentose
(Furfural)
Q.32- What are enediols? Â Â Â Â Â Â Â Â Â Â
(Double bonded carbon atoms each having OH group attached)
Q.33- Name 7 Carbon atoms containing ketose sugar   Â
(Sedoheptulose)
Q.34- Name the alcohol produced from the reduction of Glyceraldehyde.
(Glycerol)
Q.35- How many isomers of Glucose are found in the biological system?
(32, including anomers)
Q.36- Glucuronic acid produced from the reduction or oxidation of Glucose?
 (Oxidation)
Q.37- Dextrin or Dextran, which out of the two is used as a plasma expander?
(Dextran)
Q.38- Which one is a branched polymer out of the two-
Amylose or Amylopectin?                                       Â
(Amylopectin)
Q.39- Reddish-brown color with iodine is given by which carbohydrate?
 (Glycogen)
Q.40- Which sugar is called as Invert sugar? Â Â Â Â Â Â Â
(Sucrose)
Q.41- Agar is a homo or heteropolysaccharide? Â Â Â Â Â Â Â Â Â
(Homopoysaccharide)
Q.42- Keratan or Heparan Sulfate which out of the two does not contain a sugar acid?
(Keratan sulfate)
Q.43- Name an epimer of Sorbitol                   Â
(Mannitol)
Q.44- Name an epimer of Glucuronic acid             Â
(Iduronic acid)
Q.45- How are galactose and fructose related to each other?
(Isomers)
Q.46- What is Aglycon?            Â
(Non-carbohydrate component in a glycoside)
Q.47- Maltose is composed of what kind of monosaccharides?
(Glucose – glucose)
Q.48- Name a pentose sugar present abundantly in heart muscle      Â
(Lyxose)
Q.49- Name a deoxysugar                        Â
(Deoxyribose)
Q.50- Name the polysaccharide present in the exoskeleton of insects
(Chitin)
Q.51- What type of linkage is present between Galactose and Glucose in Lactose?
β (1→4) glycosidic linkage
Q.52- The compounds having the same structural formula but differing in configuration around one carbon atom are called- Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
(Epimers)
Q.53- What type of linkages are present in Glycogen?
(α(1→4) in the chain and α(1→6) at the branch point
Q.54- Name a fructosan                     Â
(Inulin)
Q.55- Name a Galactosan                    Â
(Agar)
Q.56- Name the test for detection of carbohydrates in a solution
(Molisch test)
Q.57- When a hexose is made to react with a strong acid, what is the product called?
 (Hydroxymethyl furfural)
Q.58- How are Mannose and Glucose related to each other?
(C-2 epimers)
Q.59- When both aldehyde and primary alcoholic groups are oxidized in mannose, what is the product called?                                     Â
(Mannaric acid) Â Â Â Â Â Â Â Â
Q.60- Dulcitol is produced from the reduction of which sugar?
 (Galactose)
Q.61- Name two amino sugars                Â
(Glucosamine and Galactosamine)
Q.62- Out of Mucic acid and Muramic acid which one is an amino sugar-acid?
(Muramic acid)
Q.63- Name a sugar ester               Â
(Glucose 6 phosphate)
Q- 64- Which out of the following will give Bial’s test positive
Glucose, Fructose, ribose                             Â
(Ribose)
Q.65- All except one will exhibit mutarotation?
Sucrose, Maltose, Glucose, Galactose           Â
(Sucrose)
Q.66- Out of Pyranose and Furanose ring which one is commonly formed by the Fructose ?
 (Furanose)
Q.67- Which out of the two has more carbohydrate content?
Proteoglycan or Glycoproteins                      Â
(Proteoglycan)
Q.68- Name the storage polysaccharides         Â
(Glycogen, Starch, Inulin, etc )
Q.69- Cornea is rich in which type of mucopolysaccharides?
(Keratan sulfate)
Q.70 -Name C-4 epimers                             Â
(Glucose and Galactose)
Q.71- Name a keto triose                            Â
(Dihydroxyacetone)
Q.72- Name the alcohol produced from the reduction of Fructose
(Sorbitol and Mannitol)
Q. 73- Glucose is the only source of energy for what kind of cells?
 ( Red blood cells and the cells which lack mitochondria )
Q.74- How is Aldonic acid produced from a monosaccharide    Â
(By the oxidation of aldehyde group of an aldose sugar)
Q.75- What type of linkages are present between glucose residues in Cellulose?
(Beta 1, 4 Glycosidic linkages)
Q.76- Out of all the biologically important mucopolysaccharides which one is the most negatively charged?                                           Â
(Heparin)
Q.77- Which monosaccharide is present as a structural component of RNA?
 (Ribose)
Q.78- What is dextrose? Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
(D- Glucose)
Q.79- What is table sugar? Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
(Sucrose)
Q.80- What is animal starch? Â Â Â Â Â Â Â Â Â Â Â Â Â
( Glycogen )
Q.81- What is Mutarotation ?
Carbohydrates can change spontaneously between alpha and beta configurations through intermediate open-chain formation, this leads to a process known as Mutarotation.
Q.82- Which hexose is an important component of glycoproteins?
(Mannose)
Q.83- When an equal amount of dextrorotatory and levorotatory isomers are present in a mixture, the mixture is said to be——? Â Â Â Â Â Â Â Â Â Â Â Â Â Â
(Racemic )
Q.84- Glucose when treated with bromine water produces ——?
(Gluconic acid)
Q.85- Name a glycoside which is an inhibitor of Sodium Potassium ATPase pump.
(Ouabain)
Q.86- What is the storage form of glucose in plants?
(Starch)
Q.87 – Name an amino sugar-acid that is present in gangliosides.
(NANA- N -acetyl Neuraminic acid)
Q.88- Deoxyribose is synthesized from ribose by removal of oxygen around which carbon atom? Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
( C-2)
Q.89- The carbohydrate of blood group substance is—–?
(Fucose)
Q.90- Which of the following is not a polymer of Glucose?
Cellulose, Inulin. Glycogen, Dextrins                       Â
(Inulin)
Q.91- Which of the following is an anomeric pair?
a) D-glucose and L-glucose        b) α-D-glucose and β-D-glucose           Â
(α-D-glucose and β-D-glucose)
Q.92- Choose the odd one out-
Muramic acid, Mucic acid. Mannaric acid, Mannonic acid   Â
(Muramic acid)
Q.93- The cyclical structure of Glucose is represented by-
Glucopyranose, Glucofuranose or Glucoside           Â
(Glucopyranose)
Q.94- What kind of monosaccharides will be produced by lactose hydrolysis?
 (Glucose and Galactose)
Q.95- Name a keto hexose                             Â
(Fructose)
Q.96- What is an asymmetric carbon atom?
(A carbon atom with all the four different attachments is called as an asymmetric carbon atom)
Q.97- How many isomers of glyceraldehyde are possible?
 (D and L)
Q.98- How are Ribose and Ribulose related to each other?
 (Aldose, ketose isomers)
Q.99- What is the repeating disaccharide unit in Hyaluronic acid?
(D-glucuronate + GlcNAc) n
Q.100- Name an Aldotetrose which is an intermediate of the HMP pathway?
 (Erythrose-4 P )
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