MCQs INTRODUCTION TO CARBOHYDRATE

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
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
(A) Epimers (B) Anomers
(C) Optical isomers (D) Steroisomers
11. The most important epimer of glucose is
(A) Galactose (B) Fructose
(C) Arabinose (D) Xylose
12. ααα-D-glucose and β -D-glucose are
(A) Stereoisomers (B) Epimers
(C) Anomers (D) Keto-aldo pairs
13. ααα-D-glucose + 1120→ + 52.50 ← + 190 βββ-
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
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
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
28. A dissaccharide formed by 1,1-glycosidic
linkage between their monosaccharide
units is
(A) Lactose (B) Maltose
(C) Trehalose (D) Sucrose
29. A dissaccharide formed by 1,1-glycosidic
linkage between their monosaccharide
units is
(A) Lactose (B) Maltose
(C) Trehalose (D) Sucrose
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 homopo lysacchar ide 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
(A) Glucose (B) Fructose
(C) Mannose (D) Galactose
35. The po lysacchar ide 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
(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. G lucose on reduct ion w ith sod ium
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
(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
(A) Glucose (B) Fructose
(C) Lactose (D) Maltose
50. Osazones are not formed with the
(A) Glucose (B) Fructose
(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
(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
(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
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

 

ANSWERS
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
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