Question 1

Plant starch includes amylopectin and cellulose

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is not a reducing sugar?

Accepted Answer

A)   glucose
B)   fructose
C)   sucrose
D)   maltose
E)   lactoseF) A) and D)
G) None of the above

Question 3

A bacterial cell wall is composed of:

Accepted Answer

A)   A polysaccharide consisting of a single type of monosaccharide unit and cross-linking oligopeptides.
B)   A polysaccharide consisting of 2 types of monosaccharide units and cross-linking oligopeptides.
C)   A polysaccharide consisting of 3 types of monosaccharide units and cross-linking oligopeptides.
D)   Two different polysaccharides and 1 type of oligopeptide, which are cross-linked.E) B) and D)
F) None of the above

Question 4

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) All of the above

Question 5

A major difference between amylose and amylopectin is that

Accepted Answer

A)   amylose is connected by a(1-4)  bonds and amylopectin is connected by b(1-4)  bonds.
B)   amylose is branched and amylopectin is not.
C)   amylopectin is branched and amylose is not.
D)   each is composed different types of sugar residues.E) None of the above
F) All of the above

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

Which of the following molecules have the highest degree of a[1-6] branching linkages

Accepted Answer

A)   Amylose
B)   Amylopectin
C)   Starch
D)   Glycogen
E)   All of these have the same degree of branchingF) B) and D)
G) A) and B)

Question 8

The following sugar is also called blood sugar:

Accepted Answer

A)   Fructose
B)   Glucose
C)   Lactose
D)   Sucrose
E)   MaltoseF) All of the above
G) B) and D)

Question 9

Exhibit 16A  Refer to Exhibit 16A.The enantiomer of D-glucose is:

Accepted Answer

A)   D-Fructose
B)   D-Glucose
C)   L-Glucose
D)   L-Idose
E)   D-GalactoseF) A) and E)
G) B) and D)

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) C) and D)
G) B) and E)

Question 11

Which of the following groups is produced when an aldehyde is oxidized?

Accepted Answer

A)   ketone
B)   carboxyl
C)   alcohol
D)   etherE) None of the above
F) All of the above

Question 12

Aldoses can form which type of cyclic structure?

Accepted Answer

A)   Hemiacetal
B)   Hemiketal
C)   Both hemiacetal and hemiketal
D)   Neither hemiacetal and hemiketalE) A) and C)
F) B) and C)

Question 13

Maltose is composed of the following simple sugars:

Accepted Answer

A)   galactose only
B)   glucose only
C)   fructose only
D)   galactose and glucose
E)   glucose and fructoseF)  galactose and fructoseG) D) and F)
H) A) and E) B

Question 14

Exhibit 16C  A polysaccharide.
Refer to Exhibit 16C.Which best describes the polysaccharide?

Accepted Answer

A)   homopolysaccharide
B)   heteropolysaccharide
C)   aminopolysaccharide
D)   cryptopolysaccharideE) None of the above
F) A) and D)

Question 15

Exhibit 16B  A carbohydrate Fischer projection.
Refer to Exhibit 16B.The carbohydrate shown is

Accepted Answer

A)   the D isomer.
B)   the L isomer.
C)   both D and L.
D)   neither D nor L.
E)   It's impossible to tell from a picture which isomer this is.F) A) and D)
G) B) and C)

Question 16

A lactone is a cyclic

Accepted Answer

A)   ether.
B)   ester.
C)   ketone.
D)   alcohol.E) None of the above
F) C) and D) B

Question 17

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) All of the above
F) None of the above

Question 18

Glycogen breakdown proceeds from the nonreducing ends.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following artificial sweeteners is a chemical derivative of sucrose?

Accepted Answer

A)   saccharin
B)   cyclamates
C)   sucralose
D)   aspartameE) B) and D)
F) B) and C) C

Question 20

The conversion of a sugar's carbonyl to an alcohol is

Accepted Answer

A)   a reduction reaction.
B)   an oxidation reaction.
C)   a glycosidic reaction.
D)   impossible.E) A) and D)
F) None of the above

Exam 16: Carbohydrates

Plant starch includes amylopectin and cellulose

Correct AnswerverifiedShow Answer

Which of the following is not a reducing sugar?

Correct AnswerverifiedShow Answer

A bacterial cell wall is composed of:

Correct AnswerverifiedShow Answer

Which of the following is true concerning the molecule pictured?

Correct AnswerverifiedShow Answer

A major difference between amylose and amylopectin is that

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following molecules have the highest degree of a[1-6] branching linkages

Correct AnswerverifiedShow Answer

The following sugar is also called blood sugar:

Correct AnswerverifiedShow Answer

Exhibit 16A Refer to Exhibit 16A.The enantiomer of D-glucose is:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following groups is produced when an aldehyde is oxidized?

Correct AnswerverifiedShow Answer

Aldoses can form which type of cyclic structure?

Correct AnswerverifiedShow Answer

Maltose is composed of the following simple sugars:

Correct AnswerverifiedB

Exhibit 16C A polysaccharide. Refer to Exhibit 16C.Which best describes the polysaccharide?

Correct AnswerverifiedShow Answer

Exhibit 16B A carbohydrate Fischer projection. Refer to Exhibit 16B.The carbohydrate shown is

Correct AnswerverifiedShow Answer

A lactone is a cyclic

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

Glycogen breakdown proceeds from the nonreducing ends.

Correct AnswerverifiedShow Answer

Which of the following artificial sweeteners is a chemical derivative of sucrose?

Correct AnswerverifiedC

The conversion of a sugar's carbonyl to an alcohol is

Correct AnswerverifiedShow Answer

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B

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B

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C

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