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;aldose 
A) α anomer;ketose 
B) β anomer;ketose 
C) α anomer;aldose 
D) β anomer;aldose

Question 2

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

Question 3

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. 
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.

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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) glucoconjugate 
A) glycoside 
B) glycoprotein 
C) heteroglycan 
D) glucoconjugate

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

Question 7

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. 
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.

Question 8

Which does not apply to dihydroxyacetone?

Accepted Answer

A) Ketose. 
B) Triose. 
C) Chiral. 
D) Water-soluble. 
A) Ketose. 
B) Triose. 
C) Chiral. 
D) Water-soluble.

Question 9

Which is a general term indicating a carbohydrate polymer?

Accepted Answer

A) Glycan. 
B) Polycarb. 
C) Multimer. 
D) Oligosaccharide. 
A) Glycan. 
B) Polycarb. 
C) Multimer. 
D) Oligosaccharide.

Question 10

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. 
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.

Question 11

For cattle,cellulose is a storage homoglycan.

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

A) 6,5 
B) 6,6 
C) 5,6 
D) 5,5 
A) 6,5 
B) 6,6 
C) 5,6 
D) 5,5

Question 13

Which is not a glycoconjugate?

Accepted Answer

A) Proteoglycan. 
B) Glycolipid. 
C) Glycoprotein. 
D) Homoglycan. 
A) Proteoglycan. 
B) Glycolipid. 
C) Glycoprotein. 
D) Homoglycan.

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)isomers 
A) epimers 
B) enantiomers 
C) anomers 
D) structural (constitutional)isomers

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

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

Question 17

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. 
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.

Question 18

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

Question 19

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. 
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.

Question 20

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

Exam 8: Carbohydrates

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

What type of bond links the monomers of a polysaccharide?

Anomers can be interconverted ________.

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

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

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

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

Which does not apply to dihydroxyacetone?

Which is a general term indicating a carbohydrate polymer?

Which statement is false about the sugar units in DNA?

For cattle,cellulose is a storage homoglycan.

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

Which is not a glycoconjugate?

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

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

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

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

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

Which is not a similarity between glycogen and amylopectin?

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

Introduction to Biochemistry

Water

Amino Acids and the Primary Structures of Proteins

Proteins: Three-Dimensional Structure and Function

Properties of Enzymes

Mechanisms of Enzymes

Coenzymes and Vitamins

Lipids and Membranes

Introduction to Metabolism

Glycolysis

Gluconeogenesis, the Pentose Phosphate Pathway, and Glycogen Metabolism

The Citric Acid Cycle

Electron Transport and Atp Synthesis

Photosynthesis

Lipid Metabolism

Amino Acid Metabolism

Nucleotide Metabolism

Nucleic Acids

DNA Replication, repair, and Recombination

Transcription and RNA Processing

Protein Synthesis

Filters

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

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