BIO CHEMISTRY MCQs WITH ANSWER
BIO CHEMISTRY MCQs WITH ANSWER
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. 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 6
(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. 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 6
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
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) Lactos
e (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
(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) Lactos
e (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
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