mcqs on carbohydrates - wordpress.com · mcqs on carbohydrates dr. ruchika yadu. q26 a positive...
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MCQs On
CARBOHYDRATES
Dr. RUCHIKA YADU
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Q26 A positive Benedict’s test is not given
by
A.Lactose
B. Maltose
C. Sucrose
D.Glucose
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Q27. The most important epimer of
glucose is
A.Arabinose
B. Fructose
C. Galactose
D.Xylose
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Q28. Analogue of starch is
A.cellulose
B. glycogen
C. sucrose
D.pentose
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Q29. Glucose is a monosaccharide and is a
A.hexose
B. pentose
C. furanose
D.sucrose
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Q30. Linkage between two monosaccharides, is
A. ionic bond
B. covalent bond
C. hydrogen bond
D.glycosidic bond
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Q31. If carbonyl group is an aldehyde
monosaccharide is
A.ketose
B. Tetrose
C. aldose
D.Maltose
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Q32. 3 carbon monosaccharides are called
as
A. trioses
B. Tetrose
C. pentose
D.hexoses
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Q33. Starch is a glucose polymer in which
glucopyranose units are bonded by
A.alpha linkages
B. beta linkages
C. gamma linkages
D.none of above
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Q34. The minimum number of carbons in
monosaccharide is
A.1
B. 2
C. 3
D.4
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Q35. Examples of Epimers
A.Glucose & Galactose
B. Glucose & Ribose
C. Mannose & Glucose
D. a & c
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Q36. Majority of the monosaccharides
found in the human body are of
A. L-type
B. D-type
C. DL-types
D. None of the above
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Q37.For hydrolysis of starch, enzyme used
is
A.glycosylase
B. amylase
C. polymerase
D.helicase
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Q38. Sugar that makes up RNA is
A.ribose
B. deoxyribose
C. glucose
D.pentose
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Q39. Maltose exists in
A.α configuration
B. β configuration
C. γ configuration
D.all of above
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Q40. On heating starches are
A.Insoluble in water
B. Soluble in water
C. becomes a regular geometrical shape
D.No effect of heat
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Q41. Units of carbohydrates which cannot be
further hydrolyzed to simpler compounds are
A.disaccharides
B. polysaccharides
C. monosaccharides
D.Oligosaccharides
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Q42. A monosaccharide switches from an open
chain to a cyclic form through
A.hydroxylation
B. carbation
C. nucleophilic addition
D.hydrogenation
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Q43. Formula for monosaccharide is
A. (CH2O)n
B. CnH2n
C. both A and B
D.none of above
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Q44. Hydrolysis of glycoside bond involves
A.breakdown of glycosidic bonds
B. formation of glycosidic bonds
C. formation of hydrogen bond
D.formation of ionic bond
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Q45. 6 carbon rings have suffix
A.glucose
B. fructose
C. pyranose
D.pentose
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Q46. If OH group is to left of last stereocenter
carbon than configuration is
A.D
B. L
C. α
D.β
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Q47.Simplest form of sugars are usually
A.colorless
B. water soluble
C. crystalline
D.all of above
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Q48. Lactose is an example of
A. polysaccharides
B. monosaccharides
C. Disaccharides
D.Oligosaccharides
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Q49. A method of writing structural formula of
carbohydrates to represent monosaccharide's cyclic
structure with a simple 3D perspective is known as
A.Haworth projection
B. Structural formula
C. Empirical formula
D.Simple formula
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Q50.When mixed with iodine glycogen
turns
A.blue
B. purple
C. pink
D.red
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Ques. Option Answer26 C Sucrose27 C Galactose28 B Glycogen29 A Hexose30 D Glycosidic bonds31 C Aldose32 A Trioses33 A Alpha linkages34 C 335 D a & c36 B D type37 B Amylase38 A Ribose39 A α configuration
40 B Soluble in water
41 C monosaccharides42 C Nucleophillic addition43 A (CH2O)n
44 A Breakdown of glycosidic bonds45 C Pyranose46 B L47 D All of the above48 C disaccharides49 A Haworth projections50 D red