Question 1

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.F) A) and B)
G) C) and D)

Question 2

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 3

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.E) None of the above
F) B) and D)

Question 4

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.F) B) and C)
G) A) and E)

Question 5

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 methlyatedE) C) and D)
F) A) and B)

Question 6

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.E) All of the above
F) B) and C)

Question 7

A lactone is a cyclic

Accepted Answer

A)   ether.
B)   ester.
C)   ketone.
D)   alcohol.E) A) and D)
F) A) and B) B

Question 8

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 theseE) B) and C)
F) A) and B)

Question 9

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 theseE) B) and D)
F) All of the above

Question 10

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.F) A) and B)
G) None of the above C

Question 11

​ Explain how starch and cellulose differ from one another.

Accepted Answer

Starch is a polymer of α -D-glucose that...

Question 12

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.E) C) and D)
F) None of the above

Question 13

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.E) A) and C)
F) C) and D)

Question 14

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.E) All of the above
F) A) and C)

Question 15

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.F) B) and C)
G) B) and D)

Question 16

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 theseE) C) and D)
F) All of the above

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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.E) C) and D)
F) B) and D) D

Question 20

Mirror image stereoisomers are called

Accepted Answer

A)   anomers.
B)   diastereoisomers.
C)   enantiomers.
D)   epimers.E) C) and D)
F) A) and C)

Exam 16: Carbohydrates

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is true concerning the molecule pictured?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

A lactone is a cyclic

Correct AnswerverifiedB

When monosaccharides are bonded together

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedC

​ Explain how starch and cellulose differ from one another.

Correct AnswerverifiedStarch is a polymer of α -D-glucose that...View AnswerShow Answer

Which of the following is not a function of carbohydrates?

Correct AnswerverifiedShow Answer

A pyranose is a sugar that

Correct AnswerverifiedShow Answer

A furanose is a sugar that

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following statements associated with cellulose is false ?

Correct AnswerverifiedD

Mirror image stereoisomers are called

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Explain how starch and cellulose differ from one another.

Correct Answer
verified
Starch is a polymer of α -D-glucose that...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified