BIOCHEMISTRY

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PART II (Carbohydrate)
MCQ (80 Questions )
2016 / 2017
BY : AMJED TALEB

MYSTURIOUS PERSON AMJED TALEB

1-. The general formula of monosaccharides is:
(A) CnH2nOn (B) C2nH2On
(C) CnH2O2n (D) CnH2nO2n.

2-The general formula of polysaccharides is:

(A) (C6H10O5)n (B) (C6H12O5)n
(C) (C6H10O6)n (D) (C6H10O6)n.

3-The aldose sugar is:

(A) Glycerose (B) Ribulose
(C) Erythrulose (D) Dihydoxyacetone.

4-A triose sugar is:

(A) Glycerose (B) Ribose
(C) Erythrose (D) Fructose.

5-A pentose sugar is:

(A) Dihydroxyacetone (B) Ribulose
(C) Erythrose (D) Glucose.

MYSTURIOUS PERSON AMJED TALEB

6-The pentose sugar present mainly in the heart muscle
is:
(A) Lyxose (B) Ribose
(C) Arabinose (D) Xylose.

7-Polysaccharides are:
(A) Polymers (B) Acids
(C) Proteins (D) Oils.

8-The number of isomers of glucose is:

(A) 2 (B) 4
(C) 8 (D) 16.

9-Compounds having the same structural formula but

differing in spatial configuration are known as:
(A) Stereoisomers (B) Anomers
(C) Optical isomers (D) Epimers.

10-α-D-glucose + 1120→ + 52.50 ← + 190 β- D-glucose

for glucose above represents:
(A) Optical isomerism (B) Mutarotation
(C) Epimerisation (D) D and L
isomerism.

MYSTURIOUS PERSON AMJED TALEB

11-α-D-glucose and β -D-glucose are:
(A) Stereoisomers (B) Epimers
(C) Anomers (D) Keto-aldo pairs.

12-The most important epimer of glucose is:

(A) Galactose (B) Fructose
(C) Arabinose (D) Xylose.

13-Isomers differing as a result of variations in

configuration of the —OH and —H on carbon atoms 2, 3
and 4 of glucose are known as:
(A) Epimers (B) Anomers
(C) Optical isomers (D) Steroisomers.

14-Two sugars which differ from one another only in

configuration around a single carbon atom are termed:
(A) Epimers (B) Anomers
(C) Optical isomers (D) Stereoisomers.

MYSTURIOUS PERSON AMJED TALEB

15-In glucose the orientation of the —H and —OH groups
around the carbon atom 5 adjacent to the terminal primary
alcohol carbon determines:
(A) D or L series
(B) Dextro or levorotatory
(C) α and β anomers
(D) Epimers.

16-The carbohydrate of the blood group substances is:

(A) Sucrose (B) Fucose
(C) Arabinose (D) Maltose.

17-Erythromycin contains:
(A) Dimethyl amino sugar
(B) Trimethyl amino sugar
(C) Sterol and sugar
(D) Glycerol and sugar.

18-A sugar alcohol is:

(A) Mannitol (B) Trehalose
(C) Xylulose (D) Arabinose.

19-The major sugar of insect hemolymph is:

(A) Glycogen (B) Pectin
(C) Trehalose (D) Sucrose.

MYSTURIOUS PERSON AMJED TALEB

20-The sugar found in DNA is:
(A) Xylose (B) Ribose
(C) Deoxyribose (D) Ribulose.

21-The sugar found in RNA is:

(A) Ribose (B) Deoxyribose
(C) Ribulose (D) Erythrose.

22-The sugar found in milk is:

(A) Galactose (B) Glucose
(C) Fructose (D) Lactose.

23-Invert sugar is:

(A) Lactose
(B) Sucrose
(C) Hydrolytic products of sucrose
(D) Fructose.

24-Sucrose consists of:

(A) Glucose + glucose (B) Glucose + fructose
(C) Glucose + galactose (D) Glucose + mannose.

MYSTURIOUS PERSON AMJED TALEB

25-The monosaccharide units are linked by 1 → 4
glycosidic linkage in:
(A) Maltose (B) Sucrose
(C) Cellulose (D) Cellobiose.

26-Which of the following is a non-reducing sugar:

(A) Isomaltose (B) Maltose
(C) Lactose (D) Trehalose.

27-Which of the following is a reducing sugar:

(A) Sucrose (B) Trehalose
(C) Isomaltose (D) Agar.

28-A dissaccharide formed by 1,1-glycosidic linkage

between their monosaccharide units is:
(A) Lactose (B) Maltose
(C) Trehalose (D) Sucrose.

29-Mutarotation refers to change in:

(A) Ph (B) Optical rotation
(C) Conductance (D) Chemical properties.

MYSTURIOUS PERSON AMJED TALEB

30-The polysaccharide used in assessing the glomerular
fittration rate (GFR) is:
(A) Glycogen (B) Agar
(C) Inulin (D) Hyaluronic acid.

31-The constituent unit of inulin is:

(A) Glucose (B) Fructose
(C) Mannose (D) Galactose.

32-The po lysacchar ide found in the exoskeleton of

invertebrates is:
(A) Pectin (B) Chitin
(C) Cellulose (D) Chondroitin sulphate.

33-The glycosaminoglycan which does not contain uronic

acid is:
(A) Dermatan sulphate (B) Chondroitin sulphate
(C) Keratan sulphate (D) Heparan sulphate.

34-. Keratan sulphate is found in abundance in:

(A) Heart muscle (B) Liver
(C) Adrenal cortex (D) Cornea.

MYSTURIOUS PERSON AMJED TALEB

35-. Repeating units of hyaluronic acid are:
(A) N-acetyl glucosamine and D-glucuronic acid
(B) N-acetyl galactosamine and D-glucuronic.
(C) N-acetyl glucosamine and galactose.
(D) N-acetyl galactosamine and L- iduronic acid.

36-The most abundant carbohydrate found in nature is:

(A) Starch (B) Glycogen
(C) Cellulose (D) Chitin.

37-Osazones are not formed with the:

(A) Glucose (B) Fructose
(C) Sucrose (D) Lactose.

38-A positive Seliwanoff’s test is obtained with:

(A) Glucose (B) Fructose
(C) Lactose (D) Maltose.

39-Starch is a:
(A) Polysaccharide (B) Monosaccharide
(C) Disaccharide (D) None of these.

MYSTURIOUS PERSON AMJED TALEB

40-A positive Benedict’s test is not given by:
(A) Sucrose (B) Lactose
(C) Maltose (D) Glucose.

41-Glucose on oxidation does not give:

(A) Glycoside (B) Glucosaccharic acid
(C) Gluconic acid (D) Glucuronic acid.

42-G lucose on reduct ion w ith sod ium amalgam forms:

(A) Dulcitol (B) Sorbitol
(C) Mannitol (D) Mannitol and sorbitol.

43-A polymer of glucose synthesized by the action of

leuconostoc mesenteroids in a sucrose medium is:
(A) Dextrans (B) Dextrin
(C) Limit dextrin (D) Inulin.

44-Fructose is present in hydrolysate of:

(A) Sucrose (B) Inulin
(C) Both of the above (D) None of these.

MYSTURIOUS PERSON AMJED TALEB

45-Ribulose is a these:
(A) Ketotetrose (B) Aldotetrose
(C) Ketopentose (D) Aldopentose.

46-. A carbohydrate, commonly known as dextrose is:

(A) Dextrin (B) D-Fructose
(C) D-Glucose (D) Glycogen.

47-A carbohydrate, known commonly as invert sugar, is:

(A) Fructose (B) Sucrose
(C) Glucose (D) Lactose.

48-A heteropolysacchraide among the following is:

(A) Inulin (B) Cellulose
(C) Heparin (D) Dextrin.

49-The predominant form of glucose in solution is:

(A) Acyclic form (B) Hydrated acyclic form
(C) Glucofuranose (D) Glucopyranose.

MYSTURIOUS PERSON AMJED TALEB

50-Hyaluronic acid is found in:
(A) Joints (B) Brain
(C) Abdomen (D) Mouth.

51-. α–D–Glucuronic acid is present in:

(A) Hyaluronic acid (B) Chondroitin sulphate
(C) Heparin (D) All of these.

52-Maltose can be formed by hydrolysis of:

(A) Starch (B) Dextrin
(C) Glycogen (D) All of these.

53-. Number of stereoisomers of glucose is:

(A) 4 (B) 8
(C) 16 (D) None of these.

54-The highest concentrations of fructose are found in:

(A) Aqueous humor (B) Vitreous humor
(C) Synovial fluid (D) Seminal fluid.

MYSTURIOUS PERSON AMJED TALEB

55-Synovial fluid contains:
(A) Heparin (B) Hyaluronic acid
(C) Chondroitin sulphate (D) Keratin sulphate.

56-Amylose is a constituent of:

(A) Starch (B) Cellulose
(C) Glycogen (D) None of these.

57-α-Glycosidic bond is present in :

(A) Lactose (B) Maltose
(C) Sucrose (D) All of these.

58-The smallest monosaccharide having furanose ring

structure is:
(A) Erythrose (B) Ribose
(C) Glucose (D) Fructose.

59-The following is actively absorbed in the intestine:

(A) Fructose (B) Mannose
(C) Galactose (D) None of these.

MYSTURIOUS PERSON AMJED TALEB

60-On boiling Benedict’s solution is not reduced by:
(A) Sucrose (B) Lactose
(C) Maltose (D) Fructose.

61-Iodine solution produces no color with:

(A) Cellulose (B) Starch
(C) Dextrin (D) Glycogen.

62-Amylose contains glucose units:

(A) 100–200 (B) 200–300
(C) 300–400 (D) 500–600.

63-Blood group substances consist of:

(A) Lactose (B) Maltose
(C) Fructose (D) Mucose.

64-Cerebrosides consist of mostly of this sugar:

(A) Glucose (B) Fructose
(C) Galactose (D) Arabinose.

MYSTURIOUS PERSON AMJED TALEB

65-Glucose will be converted into fatty acids if the diet has
excess of :
(A) Carbohydrates (B) Proteins
(C) Fat (D) Vitamins.

66-. The purple ring of Molisch reaction is due to:

(A) Furfural (B) Furfural + α Napthol
(C) °C Napthol (D) Furfurol + H2SO4 + α –Naphthol.

67-Specific test for ketohexoses:

(A) Seliwanoff’s test (B) Osazone test
(C) Molisch test (D) None of these.

68-Cane sugar (Sucrose) injected into blood is:

(A) changed to fructose
(B) changed to glucose
(C) undergoes no significant change
(D) changed to glucose and fructose.

69-Galactose is a main constituent of:

(A) Milk sugar (B) Honey
(C) Cane sugar (D) Chitin.

MYSTURIOUS PERSON AMJED TALEB

70-Glucosamine is an important constituent of:
(A) Homopolysaccharide
(B) Heteropolysaccharide
(C) Mucopolysaccharide
(D) Dextran.

71-Glycogen is present in all body tissues except:

(A) Liver (B) Brain
(C) Kidney (D) Stomach.

72-Iodine test is positive for starch, dextrin and:

(A) Mucoproteins (B) Agar
(C) Glycogen (D) Cellulose.

73-Cane sugar is known as :

(A) Galactose (B) Sucrose
(C) Fructose (D) Maltose.

74-Which of the following is not reducing sugar:

(A) Lactose (B) Maltose
(C) Sucrose (D) Fructose.

MYSTURIOUS PERSON AMJED TALEB

75-A dissaccharide linked by α-1-4 Glycosideic linkages
is:
(A) Lactose (B) Sucrose
(C) Cellulose (D) Maltose.

76-. Invert sugar is:

(A) Lactose (B) Mannose
(C) Fructose (D) Hydrolytic product of sucrose.

77-Which of the following is not a polymer of glucose:

(A) Amylose (B) Inulin
(C) Cellulose (D) Dextrin.

78-. Reducing ability of carbohydrates is due to:

(A) Carboxyl group (B) Hydroxyl group
(C) Enediol formation (D) Ring structure.

79-. Starch and glycogen are polymers of:

(A) Fructose (B) Mannose
(C) α−D-Glucose (D) Galactose.

MYSTURIOUS PERSON AMJED TALEB

80-Reduction of Glucose with Ca++ in water produces :
(A) Sorbitol (B) Dulcitol
(C) Mannitol (D) Glucuronic acid.

*** I Wish You Success In The Exam ***

MYSTURIOUS PERSON AMJED TALEB