Question 1

Which of the following molecules is a disaccharide?

Accepted Answer

A)   glucose
B)   lactose
C)   fructose
D)   galactose

Question 2

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

Accepted Answer

A)   a monosaccharide
B)   a ketose.
C)   a hexose.
D)   all of these
E)   none of these

Question 3

Which of the following is true about the ABO blood groups?

Accepted Answer

A)   all three of the blood groups have an á-L-fucose group attached
B)   type O blood is the universal donor because it has an á-L-fucose group
C)   type A blood has a â-N-acetylgalactosamine group
D)   type AB blood is the universal donor

Question 4

Lactose 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 fructose F)  galactose and fructose

Question 5

Mirror image stereoisomers are called

Accepted Answer

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

Question 6

For a D-sugar, any group that is written to the right of the carbon in a Fischer projection

Accepted Answer

A)   has an upward projection in a Haworth projection.
B)   has a downward projection in a Haworth projection.
C)   may be either up or down in a Haworth projection, it depends on the individual sugar.
D)   is missing from a Haworth projection.

Question 7

How many carbon atoms are in the simplest carbohydrates?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5 C

Question 8

Haworth projection formulas

Accepted Answer

A)   are representations of the cyclic form of sugars
B)   can show the distinction between the α and β anomers
C)   both of the above
D)   neither of the above C

Question 9

A lactone is a cyclic

Accepted Answer

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

Question 10

Which of the following best describes the glycosidic bond in the disaccharide shown?

Accepted Answer

A)   α(1−4) 
B)   β(1−4) 
C)   α(2−4) 
D)   β(2−4) 
E)   None of the above.

Question 11

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.

Question 12

Cellulose is indigestible to most animals because

Accepted Answer

A)   animals do not have the enzymes needed to hydrolyze ester linkages between the monomer units
B)   animals do not have the enzymes needed to hydrolyze the α-glycosidic linkages between the monomer units
C)   animals do not have the enzymes needed to hydrolyze the β-glycosidic linkages between the monomer units
D)   its molecular weight is too high for it to be degraded by enzymes

Question 13

Diastereomers are

Accepted Answer

A)   mirror-image, nonsuperimposable stereoisomers.
B)   non-mirror-image, nonsuperimposable stereoisomers.
C)   stereoisomers with one or more double bonds.
D)   none of the above.

Question 14

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.

Question 15

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. C

Question 16

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.

Question 17

The most common biopolymer on earth is this carbohydrate:

Accepted Answer

A)   Glucose
B)   Cellulose
C)   Starch
D)   Chitin
E)   None of these carbohydrates is very common.

Question 18

Which of the following compounds is produced by oxidation of an aldose in the cyclic form?

Accepted Answer

A)   a hemiacetal
B)   a hemiketal
C)   a lactone
D)   an amino sugar

Question 19

Glycogen is sometimes called animal starch

Accepted Answer

A) True 
 B)False

Question 20

Exhibit 16A A carbohydrate Fischer projection.
 
-Refer to Exhibit 16BA Which of the following figures represents the Haworth projection of the carbohydrate shown?

Accepted Answer

A)  
B)  
C)  
D)

Exam 16: Carbohydrates

Which of the following molecules is a disaccharide?

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

Correct AnswerverifiedShow Answer

Which of the following is true about the ABO blood groups?

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Lactose is composed of the following simple sugars:

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Mirror image stereoisomers are called

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For a D-sugar, any group that is written to the right of the carbon in a Fischer projection

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How many carbon atoms are in the simplest carbohydrates?

Correct AnswerverifiedC

Haworth projection formulas

Correct AnswerverifiedC

A lactone is a cyclic

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Which of the following best describes the glycosidic bond in the disaccharide shown?

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

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Cellulose is indigestible to most animals because

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Diastereomers are

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Which of the following statements associated with cellulose is false?

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

Correct AnswerverifiedC

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

The most common biopolymer on earth is this carbohydrate:

Correct AnswerverifiedShow Answer

Which of the following compounds is produced by oxidation of an aldose in the cyclic form?

Correct AnswerverifiedShow Answer

Glycogen is sometimes called animal starch

Correct AnswerverifiedShow Answer

Exhibit 16A A carbohydrate Fischer projection. -Refer to Exhibit 16BA Which of the following figures represents the Haworth projection of the carbohydrate shown?

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C

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C

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C

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