Question 1

Matching

-Bulky ring substituents preferentially occupy ______ positions in the chair conformation.

Accepted Answer

A)  eight 
B)  deoxy 
C)  peptidoglycan 
D)  axial 
E)  anomers
F) two
G) lactose
H) glyceraldehyde
I) amylopectin
J) epimers
K) sixteen
L) glycogen
M) equatorial
N) chitin
O) hyaluronic acid
P) amylose 
A)  eight 
B)  deoxy 
C)  peptidoglycan 
D)  axial 
E)  anomers
F) two
G) lactose
H) glyceraldehyde
I) amylopectin
J) epimers
K) sixteen
L) glycogen
M) equatorial
N) chitin
O) hyaluronic acid
P) amylose M

Question 2

A saccharide that has free aldehyde group is called a(n)_____________.

Accepted Answer

A) ketose 
B) nonreducing sugar 
C) reducing sugar 
D) aldohexose 
E) alditol 
A) ketose 
B) nonreducing sugar 
C) reducing sugar 
D) aldohexose 
E) alditol C

Question 3

-Which structures shown in the figure above represent possible structures of glucose?

Accepted Answer

A) A 
B) A and B 
C) A and C 
D) A,B,and C 
E) None of the above 
A) A 
B) A and B 
C) A and C 
D) A,B,and C 
E) None of the above B

Question 4

The structure below shows $\beta$-D-gulopyranose.  
Which of the structures below represents a Fischer projection of D-gulose?

Accepted Answer

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

Question 5

Which of these is not an artificial sweetener?

Accepted Answer

A) saccharine 
B) aspartame 
C) maltose 
D) acesulfame 
E) alitame 
A) saccharine 
B) aspartame 
C) maltose 
D) acesulfame 
E) alitame

Question 6

-Which structure shown in the figure above represents deoxyribose?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) None of the above 
A) A 
B) B 
C) C 
D) D 
E) None of the above

Question 7

How many stereoisomers are possible for a ketopentose such as ribulose?

Accepted Answer

A) 2 
B) 4 
C) 8 
D) 16 
E) 32 
A) 2 
B) 4 
C) 8 
D) 16 
E) 32

Question 8

Which of the following is a mixture of two types of polymers?

Accepted Answer

A) cellulose 
B) starch 
C) chitin 
D) glycogen 
E) amylose 
A) cellulose 
B) starch 
C) chitin 
D) glycogen 
E) amylose

Question 9

-Which structure shown in the figure above represents a ketose?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) None of the above 
A) A 
B) B 
C) C 
D) D 
E) None of the above

Question 10

-Which structure(s)shown in the figure above represent reducing sugar(s)?

Accepted Answer

A) A 
B) D 
C) C and D 
D) A,B,C,and D 
E) A,B,and C 
A) A 
B) D 
C) C and D 
D) A,B,C,and D 
E) A,B,and C

Question 11

-Which sugar shown in the figure above is the enantiomer of sugar A?

Accepted Answer

A) B 
B) C 
C) D 
D) B and D 
E) none of the above 
A) B 
B) C 
C) D 
D) B and D 
E) none of the above

Question 12

The transformation of a monosaccharide into its ______ occurs easily and does not require the assistance of a catalyst.

Accepted Answer

A) epimer 
B) anomer 
C) sugar alcohol 
D) diastereomer 
E) none of the above 
A) epimer 
B) anomer 
C) sugar alcohol 
D) diastereomer 
E) none of the above

Question 13

Which statement about N-linked glycosylation is correct?

Accepted Answer

A) N-linked oligosaccharides are attached to proteins one sugar at the time in the endoplasmic reticulum. 
B) N-linked sugars are attached to proteins as a 14 residue oligosaccharide during translation in the endoplasmic reticulum. 
C) N-linked sugars are attached to proteins as a 14 residue oligosaccharide during translation in the cytoplasm. 
D) N-linked sugars are attached to proteins as a 14 residue oligosaccharide after translation in the Golgi apparatus. 
E) N-linked oligosaccharides are attached to proteins one sugar at the time in the Golgi apparatus. 
A) N-linked oligosaccharides are attached to proteins one sugar at the time in the endoplasmic reticulum. 
B) N-linked sugars are attached to proteins as a 14 residue oligosaccharide during translation in the endoplasmic reticulum. 
C) N-linked sugars are attached to proteins as a 14 residue oligosaccharide during translation in the cytoplasm. 
D) N-linked sugars are attached to proteins as a 14 residue oligosaccharide after translation in the Golgi apparatus. 
E) N-linked oligosaccharides are attached to proteins one sugar at the time in the Golgi apparatus.

Question 14

Matching

-The main component of a bacterial cell wall is a ______.

Accepted Answer

A)  eight 
B)  deoxy 
C)  peptidoglycan 
D)  axial 
E)  anomers
F) two
G) lactose
H) glyceraldehyde
I) amylopectin
J) epimers
K) sixteen
L) glycogen
M) equatorial
N) chitin
O) hyaluronic acid
P) amylose 
A)  eight 
B)  deoxy 
C)  peptidoglycan 
D)  axial 
E)  anomers
F) two
G) lactose
H) glyceraldehyde
I) amylopectin
J) epimers
K) sixteen
L) glycogen
M) equatorial
N) chitin
O) hyaluronic acid
P) amylose

Question 15

Which of the following statements applies to all artificial sweeteners?

Accepted Answer

A) Artificial sweeteners cannot be readily metabolized. 
B) Artificial sweeteners are peptides and provide important amino acids. 
C) Artificial sweeteners have fewer calories than sucrose. 
D) Artificial sweeteners are much sweeter than sucrose. 
E) all of the above 
A) Artificial sweeteners cannot be readily metabolized. 
B) Artificial sweeteners are peptides and provide important amino acids. 
C) Artificial sweeteners have fewer calories than sucrose. 
D) Artificial sweeteners are much sweeter than sucrose. 
E) all of the above

Question 16

Starch is a mixture of

Accepted Answer

A) "$\alpha$-amylose and amylopectin." 
B) "glycogen and amylopectin." 
C) "glycogen and $\alpha$-amylose." 
D) "glycogen and cellulose." 
E) "$\alpha$-amylose and maltose." 
A) "$\alpha$-amylose and amylopectin." 
B) "glycogen and amylopectin." 
C) "glycogen and $\alpha$-amylose." 
D) "glycogen and cellulose." 
E) "$\alpha$-amylose and maltose."

Question 17

Glycoproteins

Accepted Answer

A) are only found in bacteria. 
B) are extremely homogeneous. 
C) are typically less than 1% carbohydrate by weight. 
D) are assembled under strict genetic control. 
E) exhibit microheterogeneity. 
A) are only found in bacteria. 
B) are extremely homogeneous. 
C) are typically less than 1% carbohydrate by weight. 
D) are assembled under strict genetic control. 
E) exhibit microheterogeneity.

Question 18

Proteins that bind to specific carbohydrates are called ______.

Accepted Answer

A) pectins 
B) oligonucleotides 
C) glycosaminoglycans 
D) lectins 
E) chitins 
A) pectins 
B) oligonucleotides 
C) glycosaminoglycans 
D) lectins 
E) chitins

Question 19

The figure below shows structures of several types of sugars.Which one is an alditol?

Accepted Answer

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

Question 20

-Which of the sugars shown in the figure above are L sugars?

Accepted Answer

A) A and B 
B) B and C 
C) C and D 
D) A and D 
E) None of the above 
A) A and B 
B) B and C 
C) C and D 
D) A and D 
E) None of the above

Exam 8: Carbohydrates

Matching -Bulky ring substituents preferentially occupy ______ positions in the chair conformation.

A saccharide that has free aldehyde group is called a(n)_____________.

-Which structures shown in the figure above represent possible structures of glucose?

The structure below shows β\betaβ -D-gulopyranose. Which of the structures below represents a Fischer projection of D-gulose?

Which of these is not an artificial sweetener?

-Which structure shown in the figure above represents deoxyribose?

How many stereoisomers are possible for a ketopentose such as ribulose?

Which of the following is a mixture of two types of polymers?

-Which structure shown in the figure above represents a ketose?

-Which structure(s)shown in the figure above represent reducing sugar(s)?

-Which sugar shown in the figure above is the enantiomer of sugar A?

The transformation of a monosaccharide into its ______ occurs easily and does not require the assistance of a catalyst.

Which statement about N-linked glycosylation is correct?

Matching -The main component of a bacterial cell wall is a ______.

Which of the following statements applies to all artificial sweeteners?

Starch is a mixture of

Glycoproteins

Proteins that bind to specific carbohydrates are called ______.

The figure below shows structures of several types of sugars.Which one is an alditol?

-Which of the sugars shown in the figure above are L sugars?

Introduction to the Chemistry of Life

Water

Nucleotides, nucleic Acids, and Genetic Information

Amino Acids

Proteins: Primary Structure

Proteins: Three-Dimensional Structure

Protein Function Part I: Myoglobin and Hemoglobin

Lipids and Biological Membranes

Membrane Transport

Enzyme Catalysis

Enzyme Kinetics, inhibition and Control

Biochemical Signaling

Introduction to Metabolism

Glucose Catabolism

Glycogen Metabolism and Gluconeogenesis

Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Photosynthesis

Lipid Metabolism

Amino Acid Metabolism

Mammalian Fuel Metabolism: Integration and Regulation

Nucleotide Metabolism

Nucleic Acid Structure

DNA Replication, repair and Recombination

Transcription and Rna Processing

Protein Synthesis

Regulation of Gene Expression

Filters

The structure below shows $\beta$ -D-gulopyranose. $The structure below shows \beta -D-gulopyranose. Which of the structures below represents a Fischer projection of D-gulose?$ Which of the structures below represents a Fischer projection of D-gulose?