Question 1

Examine the cyclic D-monosaccharide shown below.The ring structure is the ________ and the linear form of this monosaccharide must be a(n) ________.

Accepted Answer

A)  α anomer;ketose
B)  β anomer;ketose
C)  α anomer;aldose
D)  β anomer;aldoseE) B) and C)
F) None of the above

Question 2

A ribopyranose contains ________ carbon atoms while a ribofuranose has ________ carbon atoms.

Accepted Answer

A)  6,5
B)  6,6
C)  5,6
D)  5,5E) A) and C)
F) None of the above

Question 3

The main difference between structures of amylopectin and glycogen is the specific sugar subunit.

Accepted Answer

A) True 
 B)False

Question 4

Anomers can be interconverted ________.

Accepted Answer

A)  by rotation about carbon-carbon bonds
B)  via a linear intermediate
C)  by an isotopic exchange reaction
D)  None of the above.Anomers cannot be interconverted.E) A) and B)
F) A) and C)

Question 5

The elasticity and resistance to compression of connective tissue is due to

Accepted Answer

A)  the branching of the glycosaminoglycans there.
B)  the glycosidic linkage to the serine of proteins in the glycosaminoglycans.
C)  the carboxyl and sulfated groups in the glycosaminoglycans.
D)  the rigid structure of the glycosaminoglycans.
E)  All of the above.F) C) and E)
G) B) and E)

Question 6

Select the correct description from this list for the following terms:
-major proteoglycan of cartilage

Accepted Answer

A)  nodulation factor
B)  H antigen (blood groups) 
C)  hyaluronic acid
D)  aggrecan
E)  bacterial cell wall (peptidoglycan) F) A) and B)
G) C) and D)

Question 7

Examine the Fischer projection below.How is this carbohydrate classified?

Accepted Answer

A)  L enantiomer;aldopentose.
B)  L enantiomer;ketopentose.
C)  D enantiomer;aldohexose.
D)  D enantiomer;ketopentose.E) B) and C)
F) A) and C)

Question 8

Which is a general term indicating a carbohydrate polymer?

Accepted Answer

A)  Glycan.
B)  Polycarb.
C)  Multimer.
D)  Oligosaccharide.E) C) and D)
F) All of the above

Question 9

When a sugar polymer is analyzed and found to have equal portions of reducing and non-reducing ends,it is likely that

Accepted Answer

A)  it shows directionality.
B)  it is linear.
C)  it is branched.
D)  it is branched,but not very highly.
E)  some of the internal glycosidic bonds are in equilibrium with open chain forms.F) A) and B)
G) A) and C)

Question 10

The chair conformation of furanoses is generally preferred to minimize steric repulsion.

Accepted Answer

A) True 
 B)False

Question 11

What type of bond links the monomers of a polysaccharide?

Accepted Answer

A)  Glucotide bond.
B)  Phosphate ester bond.
C)  Peptide bond.
D)  Glycosidic bond.E) A) and B)
F) A) and C)

Question 12

For cattle,cellulose is a storage homoglycan.

Accepted Answer

A) True 
 B)False

Question 13

A monosaccharide whose anomeric carbon atom has a glycosidic bond to an alcohol,amine or thiol is a ________.

Accepted Answer

A)  glycoside
B)  glycoprotein
C)  heteroglycan
D)  glucoconjugateE) B) and C)
F) A) and D)

Question 14

The Fischer projections of linear D-glucose and D-galactose are shown below.These two molecules are ________.

Accepted Answer

A)  epimers
B)  enantiomers
C)  anomers
D)  structural (constitutional) isomersE) B) and D)
F) None of the above

Question 15

Which does not apply to dihydroxyacetone?

Accepted Answer

A)  Ketose.
B)  Triose.
C)  Chiral.
D)  Water-soluble.E) None of the above
F) A) and D)

Question 16

Which is not a glycoconjugate?

Accepted Answer

A)  Proteoglycan.
B)  Glycolipid.
C)  Glycoprotein.
D)  Homoglycan.E) B) and D)
F) B) and C)

Question 17

Which statement is false about the sugar units in DNA?

Accepted Answer

A)  They are cyclic in DNA.
B)  It is a deoxy form of ribose.
C)  It is an epimer of glucose.
D)  It has a D-configuration.E) All of the above
F) B) and D)

Question 18

α-amylases hydrolyze α(1→4)linkages and β-amylases hydrolyze β(1→4)linkages,but neither attack α1→6)linkages.

Accepted Answer

A) True 
 B)False

Question 19

Monosaccharide derivatives in which an amino group replaces one of the hydroxyl groups may have important roles in

Accepted Answer

A)  DNA structure.
B)  intermediary metabolisms.
C)  vitamin C.
D)  sialic acids.
E)  All of the above.F) C) and D)
G) A) and B)

Question 20

Which is not a similarity between glycogen and amylopectin?

Accepted Answer

A)  They each contain about 6000 glucose residues.
B)  Each has one reducing end and many nonreducing ends.
C)  Each is highly branched.
D)  Each has branches of similar chain length.E) C) and D)
F) B) and C)

Exam 8: Carbohydrates

A ribopyranose contains ________ carbon atoms while a ribofuranose has ________ carbon atoms.

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Select the correct description from this list for the following terms: -major proteoglycan of cartilage

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Anomers can be interconverted ________.

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Examine the Fischer projection below.How is this carbohydrate classified?

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What type of bond links the monomers of a polysaccharide?

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Which is not a similarity between glycogen and amylopectin?

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α-amylases hydrolyze α(1→4)linkages and β-amylases hydrolyze β(1→4)linkages,but neither attack α1→6)linkages.

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A monosaccharide whose anomeric carbon atom has a glycosidic bond to an alcohol,amine or thiol is a ________.

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Examine the cyclic D-monosaccharide shown below.The ring structure is the ________ and the linear form of this monosaccharide must be a(n) ________.

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The elasticity and resistance to compression of connective tissue is due to

Correct AnswerverifiedShow Answer

The main difference between structures of amylopectin and glycogen is the specific sugar subunit.

Correct AnswerverifiedShow Answer

Which does not apply to dihydroxyacetone?

Correct AnswerverifiedShow Answer

For cattle,cellulose is a storage homoglycan.

Correct AnswerverifiedShow Answer

Monosaccharide derivatives in which an amino group replaces one of the hydroxyl groups may have important roles in

Correct AnswerverifiedShow Answer

The Fischer projections of linear D-glucose and D-galactose are shown below.These two molecules are ________.

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Which is a general term indicating a carbohydrate polymer?

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Which is not a glycoconjugate?

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When a sugar polymer is analyzed and found to have equal portions of reducing and non-reducing ends,it is likely that

Correct AnswerverifiedShow Answer

The chair conformation of furanoses is generally preferred to minimize steric repulsion.

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Which statement is false about the sugar units in DNA?

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A ribopyranose contains carbon atoms while a ribofuranose has carbon atoms.

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Examine the cyclic D-monosaccharide shown below.The ring structure is the and the linear form of this monosaccharide must be a(n) .

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