7 carbohydrate-question

CARBOHYDRATES AND CARBOHYDRATE METABOLISM

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
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

Dr. Ehab Aboueladab, Associate Prof.Dr. Of Biochemistry and Nutrition, email:ehab10f@gmail.com
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9. 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
10. 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
(C) Optical isomers (D) Steroisomers
11. The most important epimer of glucose is
(A) Galactose (B) Fructose
(C) Arabinose (D) Xylose
12. α-D-glucose and β -D-glucose are
(A) Stereoisomers (B) Epimers
(C) Anomers (D) Keto-aldo pairs
13. 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
14. Compounds having the same structural formula but differing in
spatial configuration are known as
(A) Stereoisomers (B) Anomers
(C) Optical isomers (D) Epimers

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

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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
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

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28. A dissaccharide formed by 1,1-glycosidic linkage between their
monosaccharide units is
(A) Lactose (B) Maltose
29. A dissaccharide formed by 1,1-glycosidic linkage between their
monosaccharide units is
30. Mutarotation refers to change in
(A) pH (B) Optical rotation
(C) Conductance (D) Chemical properties
31. A polysacchharide which is often called animal starch is
(A) Glycogen (B) Starch
(C) Inulin (D) Dextrin
32. The homopolysaccharide used for intravenous infusion as plasma
substitute is
(A) Agar (B) Inulin
(C) Pectin (D) Starch
33. The polysaccharide used in assessing the glomerular fittration rate
(GFR) is
(A) Glycogen (B) Agar
(C) Inulin (D) Hyaluronic acid
34. The constituent unit of inulin is

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

35. The polysaccharide found in the exoskeleton of invertebrates is
(A) Pectin (B) Chitin
(C) Cellulose (D) Chondroitin sulphate
36. Which of the following is a heteroglycan?
(A) Dextrins (B) Agar
(C) Inulin (D) Chitin
37. The glycosaminoglycan which does not contain uronic acid is
(A) Dermatan sulphate
(B) Chondroitin sulphate
(C) Keratan sulphate
(D) Heparan sulphate
38. The glycosaminoglycan which does not contain uronic acid is
(A) Hyaluronic acid
(B) Heparin
(C) Chondroitin sulphate
(D) Dermatan sulphate
39. Keratan sulphate is found in abundance in
(A) Heart muscle (B) Liver
(C) Adrenal cortex (D) Cornea
40. Repeating units of hyaluronic acid are
(A) N-acetyl glucosamine and D-glucuronic acid
(B) N-acetyl galactosamine and D-glucuronic acid

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(C) N-acetyl glucosamine and galactose
(D) N-acetyl galactosamine and L- iduronic acid

41. The approximate number of branches in amylopectin is
(A) 10 (B) 20
(C) 40 (D) 80
42. In amylopectin the intervals of glucose units of each branch is
(A) 10–20 (B) 24–30
(C) 30–40 (D) 40–50
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. Glucose on reduction with sodium amalgam forms
(A) Dulcitol (B) Sorbitol
(C) Mannitol (D) Mannitol and sorbitol
45. Glucose on oxidation does not give
(A) Glycoside (B) Glucosaccharic acid
(C) Gluconic acid (D) Glucuronic acid
46. Oxidation of galactose with conc HNO3 yields
(A) Mucic acid (B) Glucuronic acid
(C) Saccharic acid (D) Gluconic acid
47. A positive Benedict’s test is not given by
(A) Sucrose (B) Lactose

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(C) Maltose (D) Glucose
48. Starch is a
(A) Polysaccharide (B) Monosaccharide
(C) Disaccharide (D) None of these

49. A positive Seliwanoff’s test is obtained with
(C) Lactose (D) Maltose
50. Osazones are not formed with the
(C) Sucrose (D) Lactose
51. The most abundant carbohydrate found in nature is
(A) Starch (B) Glycogen
(C) Cellulose (D) Chitin
52. Impaired renal function is indicated when the amount of PSP
excreted in the first 15 minutes is
(A) 20% (B) 35%
(C) 40% (D) 45%
53. An early feature of renal disease is
(A) Impairment of the capacity of the tubule to perform osmotic work
(B) Decrease in maximal tubular excretory capacity
(C) Decrease in filtration factor
(D) Decrease in renal plasma flow
54. ADH test is based on the measurement of
(A) Specific gravity of urine

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(B) Concentration of urea in urine
(C) Concentration of urea in blood
(D) Volume of urine in ml/minute
55. The specific gravity of urine normally ranges from
(A) 0.900–0.999 (B) 1.003–1.030
(C) 1.000–1.001 (D) 1.101–1.120
56. Specific gravity of urine increases in
(A) Diabetes mellitus
(B) Chronic glomerulonephritis
(C) Compulsive polydypsia
(D) Hypercalcemia
57. Fixation of specific gravity of urine to 1.010 is found in
(A) Diabetes insipidus
(B) Compulsive polydypsia
(C) Cystinosis
(D) Chronic glomerulonephritis
58. Addis test is the measure of
(A) Impairment of the capacity of the tubule to perform osmotic work
(B) Secretory function of liver
(C) Excretory function of liver
(D) Activity of parenchymal cells of liver
59. Number of stereoisomers of glucose is
(A) 4 (B) 8
(C) 16 (D) None of these
60. Maltose can be formed by hydrolysis of

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(A) Starch (B) Dextrin
(C) Glycogen (D) All of these
61. α –D–Glucuronic acid is present in
(A) Hyaluronic acid (B) Chondroitin sulphate
(C) Heparin (D) All of these

62. Fructose is present in hydrolysate of
(A) Sucrose (B) Inulin
(C) Both of the above (D) None of these
63. A carbohydrate found in DNA is
(A) Ribose (B) Deoxyribose
(C) Ribulose (D) All of these
64. Ribulose is a these
(A) Ketotetrose (B) Aldotetrose
(C) Ketopentose (D) Aldopentose
65. A carbohydrate, commonly known as dextrose is
(A) Dextrin (B) D-Fructose
(C) D-Glucose (D) Glycogen
66. A carbohydrate found only in milk is
(A) Glucose (B) Galactose
(C) Lactose (D) Maltose
67. A carbohydrate, known commonly as invert sugar, is
(A) Fructose (B) Sucrose
(C) Glucose (D) Lactose

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68. A heteropolysacchraide among the following is
(A) Inulin (B) Cellulose
(C) Heparin (D) Dextrin
69. The predominant form of glucose in solution is
(A) Acyclic form
(B) Hydrated acyclic form
(C) Glucofuranose
(D) Glucopyranose
70. An L-isomer of monosaccharide formed in human body is
(A) L-fructose (B) L-Erythrose
(C) L-Xylose (D) L-Xylulose
71. Hyaluronic acid is found in
(A) Joints (B) Brain
(C) Abdomen (D) Mouth
72. The carbon atom which becomes asymmetric when the straight
chain form of monosaccharide changes into ring form is known as
(A) Anomeric carbon atom
(B) Epimeric carbon atom
(C) Isomeric carbon atom
(D) None of these
73. The smallest monosaccharide having furanose ring structure is
(A) Erythrose (B) Ribose
(C) Glucose (D) Fructose
74. Which of the following is an epimeric pair?
(A) Glucose and fructose

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(B) Glucose and galactose
(C) Galactose and mannose
(D) Lactose and maltose
75. α-Glycosidic bond is present in
(C) Sucrose (D) All of these

76. Branching occurs in glycogen approximately after every
(A) Five glucose units
(B) Ten glucose units
(C) Fifteen glucose units
(D) Twenty glucose units
77. N–Acetylglucosamnine is present in
(A) Hyaluronic acid (B) Chondroitin sulphate
(C) Heparin (D) All of these
78. Iodine gives a red colour with
(A) Starch (B) Dextrin
(C) Glycogen (D) Inulin
79. Amylose is a constituent of
(A) Starch (B) Cellulose
(C) Glycogen (D) None of these
80. Synovial fluid contains
(A) Heparin

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(B) Hyaluronic acid
(C) Chondroitin sulphate
(D) Keratin sulphate
81. Gluconeogenesis is decreased by
(A) Glucagon (B) Epinephrine
(C) Glucocorticoids (D) Insulin

82. Lactate formed in muscles can be utilized through
(A) Rapoport-Luebeling cycle
(B) Glucose-alanine cycle
(C) Cori’s cycle
(D) Citric acid cycle
83. Glucose-6-phosphatase is not present in
(A) Liver and kidneys
(B) Kidneys and muscles
(C) Kidneys and adipose tissue
(D) Muscles and adipose tissue
84. Pyruvate carboxylase is regulated by
(A) Induction (B) Repression
(C) Allosteric regulation(D) All of these
85. Fructose-2, 6-biphosphate is formed by the action of
(A) Phosphofructokinase-1

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(B) Phosphofructokinase-2
(C) Fructose biphosphate isomerase
(D) Fructose-1, 6-biphosphatase
86. The highest concentrations of fructose are found in
(A) Aqueous humor (B) Vitreous humor
(C) Synovial fluid (D) Seminal fluid
87. Glucose uptake by liver cells is
(A) Energy-consuming (B) A saturable process
(C) Insulin-dependent (D) Insulin-independent

88. Renal threshold for glucose is decreased in
(A) Diabetes mellitus (B) Insulinoma
(C) Renal glycosuria (D) Alimentary glycosuria
89. Active uptake of glucose is inhibited by
(A) Ouabain (B) Phlorrizin
(C) Digoxin (D) Alloxan
90. Glucose-6-phosphatase is absent or deficient in
(A) Von Gierke’s disease
(B) Pompe’s disease
(C) Cori’s disease
(D) McArdle’s disease
91. Glycogen is present in all body tissues except
(A) Liver (B) Brain
(C) Kidney (D) Stomach

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92. Iodine test is positive for starch, dextrin and
(A) Mucoproteins (B) Agar
(C) Glycogen (D) Cellulose
93.The general formula for polysaccharide is
(A) (C6H10O5)n (B) (C6H12C6)n
(C) (C6H12O5)n (D) (C5H10O5)n
94. Epimers of glucose is
(A) Fructose (B) Galactose
(C) Ribose (D) Deoxyribose
95. Human heart muscle contains
(A) D-Arabinose (B) D-Ribose
(C) D-Xylose (D) L-Xylose
96. The intermediate n hexose monophosphate shunt is
(A) D-Ribulose (B) D-Arabinose
(C) D-xylose (D) D-Lyxose
97. On boiling Benedict’s solution is not reduced by
(A) Sucrose (B) Lactose
(C) Maltose (D) Fructose
98. The distinguishing test between monosaccharides and
dissaccharide is
(A) Bial’s test (B) Seliwanoff’s test
(C) Barfoed’s test (D) Hydrolysis test
99. Barfoed’s solution is not reduced by
(A) Glucose (B) Mannose
(C) Sucrose (D) Ribose

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100. Cori cycle is
(A) Synthesis of glucose
(B) reuse of glucose
(C) uptake of glycose
(D) Both (A) & (B)
101. Cane sugar is known as
(A) Galactose (B) Sucrose
(C) Fructose (D) Maltose
102. Which of the following is not reducing sugar?
(C) Sucrose (D) Fructose

103. α−D-Glucose and β−D-glucose are related by
(C) Multirotation (D) Ketoenol pair
104. The stable ring formation in D-Glucose involves
(A) C-1 and C-4 (B) C-1 and C-2
(C) C-1 and C-5 (D) C-2 and C-5
105. Reduction of Glucose with Ca++ in water produces
(A) Sorbitol (B) Dulcitol
(C) Mannitol (D) Glucuronic acid
106. Starch and glycogen are polymers of
(A) Fructose (B) Mannose
(C) α−D-Glucose (D) Galactose

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107. Reducing ability of carbohydrates is due to
(A) Carboxyl group (B) Hydroxyl group
(C) Enediol formation (D) Ring structure
108. Which of the following is not a polymer of glucose?
(A) Amylose (B) Inulin
(C) Cellulose (D) Dextrin
109. Invert sugar is
(A) Lactose
(B) Mannose
(C) Fructose
(D) Hydrolytic product of sucrose
110. The carbohydrate reserved in human body is
(A) Starch (B) Glucose
(C) Glycogen (D) Inulin
111. A dissaccharide linked by α-1-4 Glycosideic linkages is
(A) Lactose (B) Sucrose
(C) Cellulose (D) Maltose

Answer
1. A 2. A 3. A 4. A 5. B 6. A
7. A 8. D 9. A 10. A 11. A 12. C
13. B 14. A 15. A 16. B 17. A 18. A
19. C 20. C 21. A 22. D 23. C 24. B
25. A 26. D 27. C 28. C 29. B 30. B

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31. D 32. A 33. C 34. B 35. B 36. B
37. C 38. B 39. D 40. A 41. D 42. B
43. A 44. B 45. A 46. A 47. A 48. A
49. B 50. C 51. C 52. A 53. A 54. A
55. B 56. A 57. D 58. A 59. C 60. D
61. C 62. C 63. B 64. C 65. C 66. C
67. B 68. C 69. D 70. D 71. A 72. A
73. B 74 B 75.B 76. B 77. A 78. C
79. A 80. B 81. D 82. C 83. D 84. D
85. B 86. D 87. D 88. C 89. B 90. A

91. B 92. C 93. A 94. B 95. C 96. A 97. A
98. C 99. C 100. D 101. B 102. C 103. B 104. C
105. A 106. C 107. A 108. B 109. D 110. C 111. D

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7 carbohydrate-question

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7 carbohydrate-question