Question 1

Which of the following statements associated with cellulose is false ?

Accepted Answer

A)  It's a linear polymer of glucose. 
B)  The glycosidic linkage is β (1 → 4). 
C)  Hydrolysis is accomplished enzymatically by cellulase. 
D)  Most animals can easily digest this compound. 
A)  It's a linear polymer of glucose. 
B)  The glycosidic linkage is β (1 → 4). 
C)  Hydrolysis is accomplished enzymatically by cellulase. 
D)  Most animals can easily digest this compound. D

Question 2

Exhibit 16C A polysaccharide.   Refer to Exhibit 16C. Which lettered subunit is the reducing end?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  There is more than one nonreducing end on this carbohydrate. 
E)  There are no nonreducing ends on this carbohydrate. 
A)  A 
B)  B 
C)  C 
D)  There is more than one nonreducing end on this carbohydrate. 
E)  There are no nonreducing ends on this carbohydrate. C

Question 3

A lactone is a cyclic

Accepted Answer

A)  ether. 
B)  ester. 
C)  ketone. 
D)  alcohol. 
A)  ether. 
B)  ester. 
C)  ketone. 
D)  alcohol. B

Question 4

When monosaccharides are bonded together

Accepted Answer

A)  one H2O molecule is lost for each new link formed. 
B)  oligosaccharides are formed by combining a few monosaccharides. 
C)  polysaccharides are formed by combining many monosaccharides. 
D)  all of these 
A)  one H2O molecule is lost for each new link formed. 
B)  oligosaccharides are formed by combining a few monosaccharides. 
C)  polysaccharides are formed by combining many monosaccharides. 
D)  all of these

Question 5

The main difference, on the surface of a red blood cell, between the A-B-O major blood groups depends on

Accepted Answer

A)  the presence or absence of a certain protein sequence. 
B)  the presence or absence of a certain sugar. 
C)  the presence or absence of an acetyl group on a sugar. 
D)  all of these 
A)  the presence or absence of a certain protein sequence. 
B)  the presence or absence of a certain sugar. 
C)  the presence or absence of an acetyl group on a sugar. 
D)  all of these

Question 6

Insoluble fiber in the diet is better at binding toxic substances than soluble fiber.

Accepted Answer

A) True 
 B)False

Question 7

​ Explain how starch and cellulose differ from one another.

Accepted Answer

Starch is a polymer of α -D-glucose that

Question 8

A pyranose is a sugar that

Accepted Answer

A)  contains a five-membered ring as part of its cyclic structure. 
B)  contains a six-membered ring as part of its cyclic structure. 
C)  is a five-carbon open-chain sugar. 
D)  is a six-carbon open-chain sugar. 
A)  contains a five-membered ring as part of its cyclic structure. 
B)  contains a six-membered ring as part of its cyclic structure. 
C)  is a five-carbon open-chain sugar. 
D)  is a six-carbon open-chain sugar.

Question 9

Exhibit 16C A polysaccharide.   Refer to Exhibit 16C. Which best describes bond #3?

Accepted Answer

A)  α [1,3] 
B)  β [1,3] 
C)  α [2,4] 
D)  β [2,4] 
E)  None of the above is a proper description. 
A)  α [1,3] 
B)  β [1,3] 
C)  α [2,4] 
D)  β [2,4] 
E)  None of the above is a proper description.

Question 10

Which of the following is true concerning the molecule pictured?

Accepted Answer

A)  It would give a positive reaction in a Tollen's silver mirror test 
B)  It is a reducing sugar 
C)  It is not a reducing sugar because it is an aldose 
D)  It is not a reducing sugar because the anomeric hydroxyl is methlyated 
A)  It would give a positive reaction in a Tollen's silver mirror test 
B)  It is a reducing sugar 
C)  It is not a reducing sugar because it is an aldose 
D)  It is not a reducing sugar because the anomeric hydroxyl is methlyated

Question 11

A furanose is a sugar that

Accepted Answer

A)  contains a five-membered ring as part of its cyclic structure. 
B)  contains a six-membered ring as part of its cyclic structure. 
C)  is a five-carbon open-chain sugar. 
D)  is a six-carbon open-chain sugar. 
A)  contains a five-membered ring as part of its cyclic structure. 
B)  contains a six-membered ring as part of its cyclic structure. 
C)  is a five-carbon open-chain sugar. 
D)  is a six-carbon open-chain sugar.

Question 12

Amino or acid derivatives of sugars are very important in which of the following biological functions?

Accepted Answer

A)  Structural roles 
B)  Lubricating fluids 
C)  Cell surface sugars used in cell identity 
D)  Both structural roles and lubricating fluids. 
E)  All of the above are functions of amino and acid sugar derivatives. 
A)  Structural roles 
B)  Lubricating fluids 
C)  Cell surface sugars used in cell identity 
D)  Both structural roles and lubricating fluids. 
E)  All of the above are functions of amino and acid sugar derivatives.

Question 13

Two samples containing identical mixtures of sugars are analyzed, one using Tollen's reagent, the other with glucose oxidase. Which will give a stronger reaction?

Accepted Answer

A)  Tollen's reagent 
B)  glucose oxidase 
C)  They will have identical strengths. 
D)  It's impossible to predict from the information provided. 
A)  Tollen's reagent 
B)  glucose oxidase 
C)  They will have identical strengths. 
D)  It's impossible to predict from the information provided.

Question 14

Humans are not able to digest cellulose as a food source because:

Accepted Answer

A)  Cellulose is very insoluble. 
B)  It is more important that the cellulose is used as fiber in our bodies. 
C)  We lack the enzyme to break the β linkage in the cellulose. 
D)  Cellulose is insoluble and we lack the enzyme to break the β linkage in the cellulose. 
E)  All of these are reasons why we cannot digest cellulose. 
A)  Cellulose is very insoluble. 
B)  It is more important that the cellulose is used as fiber in our bodies. 
C)  We lack the enzyme to break the β linkage in the cellulose. 
D)  Cellulose is insoluble and we lack the enzyme to break the β linkage in the cellulose. 
E)  All of these are reasons why we cannot digest cellulose.

Question 15

Which carbon of the open-chain form of a sugar becomes the anomeric carbon in the cyclic form?

Accepted Answer

A)  the carbonyl carbon 
B)  the highest numbered chiral center 
C)  the highest numbered carbon 
D)  It depends on the individual sugar. 
A)  the carbonyl carbon 
B)  the highest numbered chiral center 
C)  the highest numbered carbon 
D)  It depends on the individual sugar.

Question 16

Glycogen has a similar structure to amylopectin, but is less highly branched.

Accepted Answer

A) True 
 B)False

Question 17

Polysaccharides used in cell wall structure contribute rigidity to the wall due to covalent cross-linking between the fibers.

Accepted Answer

A) True 
 B)False

Question 18

Mirror image stereoisomers are called

Accepted Answer

A)  anomers. 
B)  diastereoisomers. 
C)  enantiomers. 
D)  epimers. 
A)  anomers. 
B)  diastereoisomers. 
C)  enantiomers. 
D)  epimers.

Question 19

The blue color in a well-known test for the presence of starches is due to

Accepted Answer

A)  the formation of crosslinks between molecules of starch, caused by the addition of Cu2+ 
B)  the reaction of the silver-ammonia complex ion with the hydroxyl groups of the starch 
C)  the formation of a complex between iodine and amylose 
D)  none of these 
A)  the formation of crosslinks between molecules of starch, caused by the addition of Cu2+ 
B)  the reaction of the silver-ammonia complex ion with the hydroxyl groups of the starch 
C)  the formation of a complex between iodine and amylose 
D)  none of these

Question 20

Which of the following is not a function of carbohydrates?

Accepted Answer

A)  They are major energy sources. 
B)  They play key roles in processes that take place on the surface of cells. 
C)  They are used in structural roles. 
D)  They are catalytic components of enzymes. 
A)  They are major energy sources. 
B)  They play key roles in processes that take place on the surface of cells. 
C)  They are used in structural roles. 
D)  They are catalytic components of enzymes.

Exam 16: Carbohydrates

Which of the following statements associated with cellulose is false ?

Exhibit 16C A polysaccharide. Refer to Exhibit 16C. Which lettered subunit is the reducing end?

A lactone is a cyclic

When monosaccharides are bonded together

The main difference, on the surface of a red blood cell, between the A-B-O major blood groups depends on

Insoluble fiber in the diet is better at binding toxic substances than soluble fiber.

​ Explain how starch and cellulose differ from one another.

A pyranose is a sugar that

Exhibit 16C A polysaccharide. Refer to Exhibit 16C. Which best describes bond #3?

Which of the following is true concerning the molecule pictured?

A furanose is a sugar that

Amino or acid derivatives of sugars are very important in which of the following biological functions?

Two samples containing identical mixtures of sugars are analyzed, one using Tollen's reagent, the other with glucose oxidase. Which will give a stronger reaction?

Humans are not able to digest cellulose as a food source because:

Which carbon of the open-chain form of a sugar becomes the anomeric carbon in the cyclic form?

Glycogen has a similar structure to amylopectin, but is less highly branched.

Polysaccharides used in cell wall structure contribute rigidity to the wall due to covalent cross-linking between the fibers.

Mirror image stereoisomers are called

The blue color in a well-known test for the presence of starches is due to

Which of the following is not a function of carbohydrates?

Biochemistry and the Organization of Cells

Water the Solvent for Biochemical Reactions

Amino Acids and Peptides

The Three Dimensional Structure of Proteins

Protein Purification and Characterization Techniques

The Behavior of Proteins Enzymes

The Behavior of Proteins Enzymes Mechanisms and Control

Lipids and Proteins Are Associated in Biological Membranes

Nucleic Acids How Structure Conveys Information

Biosynthesis of Nucleic Acids Replication

Transcription of the Genetic Code the Biosynthesis of Rna

Protein Synthesis Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses Cancer and Immunology

The Importance of Energy Changes and Electron Transfer in Metabolism

Glycolysis

Storage Mechanisms and Control in Carbohydrate Metabolism

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Lipid Metabolism

Photosynthesis

The Metabolism of Nitrogen

Integration of Metabolism Cellular Signaling

Filters

Explain how starch and cellulose differ from one another.