Question 1

Which of the following monosaccharides has a structure in which two or more chiral centers are present?

Accepted Answer

A)  glyceraldehyde 
B)  dihydroxyacetone 
C)  glucose 
D)  more than one correct response 
E)  no correct response 
A)  glyceraldehyde 
B)  dihydroxyacetone 
C)  glucose 
D)  more than one correct response 
E)  no correct response C

Question 2

Which of the following carbohydrates will give a positive Benedict's test?

Accepted Answer

A)  galactose 
B)  sucrose 
C)  starch 
D)  more than one correct response 
E)  no correct response 
A)  galactose 
B)  sucrose 
C)  starch 
D)  more than one correct response 
E)  no correct response A

Question 3

Use the following to answer the questions below:
For each of the compound characterizations, select from the response list an appropriate structural formula. Responses may be used more than once or need not be used at all. 
-A chiral compound with two chiral centers

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)   D

Question 4

Which of the following properties would be the same for a pair of enantiomeric monosaccharides?

Accepted Answer

A)  interaction with plane-polarized light 
B)  boiling point 
C)  solubility in water 
D)  more than one correct response 
E)  no correct response 
A)  interaction with plane-polarized light 
B)  boiling point 
C)  solubility in water 
D)  more than one correct response 
E)  no correct response

Question 5

Which of the following compounds is both an aldose and a hexose?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 6

Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: 
(1) Diastereomers are stereoisomers whose molecules are mirror images of each other.
(2) Both cyclic forms of glucose contain a six-membered carbon ring.
(3) Complete hydrolysis of both maltose and cellobiose produce the same molecule.

Accepted Answer

A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true. 
A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true.

Question 7

Use the following to answer the questions below:
For each of the compound characterizations, select an appropriate structural formula from the response list. Responses may be used more than once or need not be used at all. 
-A beta monosaccharide

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Question 8

The major structural difference between cellulose and starch is found in the

Accepted Answer

A)  identity of the monosaccharide units present 
B)  ring size of the monosaccharide units present 
C)  linkages between the monosaccharide units present 
D)  handedness of the monosaccharide units present 
A)  identity of the monosaccharide units present 
B)  ring size of the monosaccharide units present 
C)  linkages between the monosaccharide units present 
D)  handedness of the monosaccharide units present

Question 9

Which of the following monosaccharides has cyclic forms that involve a 6-membered ring?

Accepted Answer

A)  fructose 
B)  galactose 
C)  ribose 
D)  more than one correct response 
E)  no correct response 
A)  fructose 
B)  galactose 
C)  ribose 
D)  more than one correct response 
E)  no correct response

Question 10

Which of the following disaccharides produces two different monosaccharides upon hydrolysis?

Accepted Answer

A)  maltose 
B)  sucrose 
C)  cellobiose 
D)  more than one correct response 
E)  no correct response 
A)  maltose 
B)  sucrose 
C)  cellobiose 
D)  more than one correct response 
E)  no correct response

Question 11

Use the following to answer the questions below:
For each of the compound characterizations, select an appropriate structural formula from the response list. Responses may be used more than once or need not be used at all. 
-Open-chain form is a ketohexose

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Question 12

In which of the following sugars is the bonding between monosaccharide units "head-to head" rather than "head-to-tail"?

Accepted Answer

A)  cellobiose 
B)  maltose 
C)  lactose 
D)  sucrose 
A)  cellobiose 
B)  maltose 
C)  lactose 
D)  sucrose

Question 13

Use the following to answer the questions below:
For each of the compound characterizations, select from the response list an appropriate structural formula. Responses may be used more than once or need not be used at all. 
-Four different L-stereoisomers exist for this compound.

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Question 14

Use the following to answer the questions below:
For each of the disaccharides or polysaccharides, select from the response list the correct hydrolysis products. Responses may be used more than once or need not be used at all.

-Sucrose

Accepted Answer

A)  glucose only 
B)  glucose and galactose 
C)  glucose and fructose 
D)  glucose and ribose 
A)  glucose only 
B)  glucose and galactose 
C)  glucose and fructose 
D)  glucose and ribose

Question 15

Use the following to answer the questions below:
For each of the stereochemical descriptions, select from the response list an appropriate set of structural formulas. Responses may be used more than once or need not be used at all. 
-Optical isomers

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Question 16

The structure of D-galactose differs from that of D-talose at which carbon atom?

Accepted Answer

A)  carbon #3 
B)  carbon #4 
C)  carbon #2 
D)  carbon #5 
A)  carbon #3 
B)  carbon #4 
C)  carbon #2 
D)  carbon #5

Question 17

Use the following to answer the questions below:
For each of the compound characterizations, select from the response list an appropriate structural formula. Responses may be used more than once or need not be used at all. 
-A chiral compound with one chiral center

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Question 18

Which of the following is a correct pairing of terms?

Accepted Answer

A)  heteropolysaccharide and starch 
B)  homopolysaccharide and chitin 
C)  branch-chain polysaccharide and cellulose 
D)  unbranched-chain polysaccharide and glycogen 
A)  heteropolysaccharide and starch 
B)  homopolysaccharide and chitin 
C)  branch-chain polysaccharide and cellulose 
D)  unbranched-chain polysaccharide and glycogen

Question 19

Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: (1) The term sugar is a general designation for both monosaccharides and disaccharides.
(2) The "highest-numbered" chiral center in a monosaccharide is used to determine D- or L-configuration.
(3) Sucrose is a reducing sugar and lactose is a nonreducing sugar.

Accepted Answer

A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true. 
A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true.

Question 20

In which of the following carbohydrates are two different types of glycosidic linkages present?

Accepted Answer

A)  glycogen 
B)  lactose 
C)  amylose 
D)  more than one correct response 
E)  no correct response 
A)  glycogen 
B)  lactose 
C)  amylose 
D)  more than one correct response 
E)  no correct response

Exam 18: Carbohydrates

Which of the following monosaccharides has a structure in which two or more chiral centers are present?

Which of the following carbohydrates will give a positive Benedict's test?

Use the following to answer the questions below: For each of the compound characterizations, select from the response list an appropriate structural formula. Responses may be used more than once or need not be used at all. -A chiral compound with two chiral centers

Which of the following properties would be the same for a pair of enantiomeric monosaccharides?

Which of the following compounds is both an aldose and a hexose?

Use the following to answer the questions below: For each of the compound characterizations, select an appropriate structural formula from the response list. Responses may be used more than once or need not be used at all. -A beta monosaccharide

The major structural difference between cellulose and starch is found in the

Which of the following monosaccharides has cyclic forms that involve a 6-membered ring?

Which of the following disaccharides produces two different monosaccharides upon hydrolysis?

Use the following to answer the questions below: For each of the compound characterizations, select an appropriate structural formula from the response list. Responses may be used more than once or need not be used at all. -Open-chain form is a ketohexose

In which of the following sugars is the bonding between monosaccharide units "head-to head" rather than "head-to-tail"?

Use the following to answer the questions below: For each of the compound characterizations, select from the response list an appropriate structural formula. Responses may be used more than once or need not be used at all. -Four different L-stereoisomers exist for this compound.

Use the following to answer the questions below: For each of the disaccharides or polysaccharides, select from the response list the correct hydrolysis products. Responses may be used more than once or need not be used at all. -Sucrose

Use the following to answer the questions below: For each of the stereochemical descriptions, select from the response list an appropriate set of structural formulas. Responses may be used more than once or need not be used at all. -Optical isomers

The structure of D-galactose differs from that of D-talose at which carbon atom?

Use the following to answer the questions below: For each of the compound characterizations, select from the response list an appropriate structural formula. Responses may be used more than once or need not be used at all. -A chiral compound with one chiral center

Which of the following is a correct pairing of terms?

In which of the following carbohydrates are two different types of glycosidic linkages present?

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