Question 1

Identify each Fischer projection as the D- or L-isomer.
-

Accepted Answer

D

Question 2

Ribulose has the following structural formula. To what carbohydrate class does ribulose belong?

Accepted Answer

A) ketopentose 
B) aldopentose 
C) aldotetrose 
D) ketohexose 
E) ketotetrose 
A) ketopentose 
B) aldopentose 
C) aldotetrose 
D) ketohexose 
E) ketotetrose A

Question 3

Humans cannot digest cellulose because they

Accepted Answer

A)  lack the necessary enzymes to digest   
B)  are poisoned by   
C)  are allergic to   
D)  have intestinal flora which use up   
E)  cannot digest chlorophyll. 
A)  lack the necessary enzymes to digest   
B)  are poisoned by   
C)  are allergic to   
D)  have intestinal flora which use up   
E)  cannot digest chlorophyll. A

Question 4

The breakdown of carbohydrates to carbon dioxide and water in the body is called

Accepted Answer

A) photosynthesis. 
B) respiration. 
C) anabolism. 
D) mutarotation. 
E) reduction. 
A) photosynthesis. 
B) respiration. 
C) anabolism. 
D) mutarotation. 
E) reduction.

Question 5

Mannose has the structure shown below. Which isomer is shown?

Accepted Answer

A)    
B)    
C)  the D isomer 
D)  the L isomer 
E)  none of the above 
A)    
B)    
C)  the D isomer 
D)  the L isomer 
E)  none of the above

Question 6

The oxidation of monosaccharides produces

Accepted Answer

A) sugar alcohols. 
B) polysaccharides. 
C) trisaccharides. 
D) disaccharides. 
E) sugar acids. 
A) sugar alcohols. 
B) polysaccharides. 
C) trisaccharides. 
D) disaccharides. 
E) sugar acids.

Question 7

How many different substituents are required on a carbon atom for it to be chiral?

Accepted Answer

A) one 
B) two 
C) three 
D) four 
E) Any number from 1 to 4; chirality does not depend on substitution. 
A) one 
B) two 
C) three 
D) four 
E) Any number from 1 to 4; chirality does not depend on substitution.

Question 8

Refer to the disaccharides below to answer the question(s)that follow.  
-In the figure above, the monosaccharide unit at the top is a(n)

Accepted Answer

A) aldopentose. 
B) aldoheptose. 
C) ketohexose. 
D) ketopentose. 
E) aldohexose. 
A) aldopentose. 
B) aldoheptose. 
C) ketohexose. 
D) ketopentose. 
E) aldohexose.

Question 9

The breakdown of glucose to chemical energy for the cells to do work is an example of

Accepted Answer

A) mutarotation. 
B) reduction. 
C) anabolism. 
D) oxidation. 
E) respiration. 
A) mutarotation. 
B) reduction. 
C) anabolism. 
D) oxidation. 
E) respiration.

Question 10

Which of the following is an example of an aldopentose?

Accepted Answer

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

Question 11

An enantiomer is

Accepted Answer

A) a stereoisomer that is not a mirror image of another molecule. 
B) a diastereoisomer. 
C) a stereoisomer that is a mirror image of another molecule. 
D) a structural isomer. 
E) a cis-trans isomer. 
A) a stereoisomer that is not a mirror image of another molecule. 
B) a diastereoisomer. 
C) a stereoisomer that is a mirror image of another molecule. 
D) a structural isomer. 
E) a cis-trans isomer.

Question 12

In a disaccharide, two monosaccharides are joined by what kind of bond?

Accepted Answer

A) rotational 
B) double 
C) glycosidic 
D) alcohol 
E) anomeric 
A) rotational 
B) double 
C) glycosidic 
D) alcohol 
E) anomeric

Question 13

Identify each Fischer projection as the D- or L-isomer.
-

Accepted Answer

The answer of Identify each Fischer projection as the D-...

Question 14

Chirality occurs when stereoisomers have mirror images that are

Accepted Answer

A) not superimposable. 
B) identical. 
C) superimposable. 
D) not visible to one another. 
E) the same. 
A) not superimposable. 
B) identical. 
C) superimposable. 
D) not visible to one another. 
E) the same.

Question 15

Maltose can be classified as a(n)

Accepted Answer

A) polysaccharide. 
B) disaccharide. 
C) ketose. 
D) pentose. 
E) oligosaccharide. 
A) polysaccharide. 
B) disaccharide. 
C) ketose. 
D) pentose. 
E) oligosaccharide.

Question 16

Maltose is a

Accepted Answer

A) trisaccharide. 
B) phosphosaccharide. 
C) disaccharide. 
D) polysaccharide. 
E) monosaccharide. 
A) trisaccharide. 
B) phosphosaccharide. 
C) disaccharide. 
D) polysaccharide. 
E) monosaccharide.

Question 17

Galactose has the structure shown below. It can be classified as a

Accepted Answer

A) ketone. 
B) ribose. 
C) disaccharide. 
D) ketose. 
E) monosaccharide. 
A) ketone. 
B) ribose. 
C) disaccharide. 
D) ketose. 
E) monosaccharide.

Question 18

State whether each of these structures is the

Accepted Answer

The answer of State whether each of these structures is...

Question 19

Identify each Fischer projection as the D- or L-isomer.
-

Accepted Answer

The answer of Identify each Fischer projection as the D-...

Question 20

A monosaccharide that consists of 5 carbon atoms, one of which is in a ketone group, is classified as a(n)

Accepted Answer

A) ketopentose. 
B) ketotetrose. 
C) aldotetrose. 
D) aldopentose. 
E) aldohexose. 
A) ketopentose. 
B) ketotetrose. 
C) aldotetrose. 
D) aldopentose. 
E) aldohexose.

Exam 15: Carbohydrates

Identify each Fischer projection as the D- or L-isomer. -

Ribulose has the following structural formula. To what carbohydrate class does ribulose belong?

Humans cannot digest cellulose because they

The breakdown of carbohydrates to carbon dioxide and water in the body is called

Mannose has the structure shown below. Which isomer is shown?

The oxidation of monosaccharides produces

How many different substituents are required on a carbon atom for it to be chiral?

Refer to the disaccharides below to answer the question(s)that follow. -In the figure above, the monosaccharide unit at the top is a(n)

The breakdown of glucose to chemical energy for the cells to do work is an example of

Which of the following is an example of an aldopentose?

An enantiomer is

In a disaccharide, two monosaccharides are joined by what kind of bond?

Identify each Fischer projection as the D- or L-isomer. -

Chirality occurs when stereoisomers have mirror images that are

Maltose can be classified as a(n)

Maltose is a

Galactose has the structure shown below. It can be classified as a

State whether each of these structures is the

Identify each Fischer projection as the D- or L-isomer. -

A monosaccharide that consists of 5 carbon atoms, one of which is in a ketone group, is classified as a(n)

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