Question 1

Which of the following is the most abundant disaccharide?

Accepted Answer

A) lactose 
B) cellulose 
C) α-amylose 
D) maltose 
E) sucrose 
A) lactose 
B) cellulose 
C) α-amylose 
D) maltose 
E) sucrose

Question 2

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 3

Matching
-Both $\alpha$(1$\to$4)and $\alpha$(1$\to$6)bonds can be found in the plant product______.

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 4

Which of the following polysaccharides cannot be digested by mammalian salivary, gastric, or pancreatic enzymes?

Accepted Answer

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

Question 5

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 6

This figure is used in questions .  
-The configuration around which carbon atom shown in the figure above determines whether this is a D or an L sugar?

Accepted Answer

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

Question 7

Which of the following is an example of a heteropolysaccharide?

Accepted Answer

A) cellulose 
B) chitin 
C) starch 
D) glycogen 
E) hyaluronic acid 
A) cellulose 
B) chitin 
C) starch 
D) glycogen 
E) hyaluronic acid

Question 8

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

Accepted Answer

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

Question 9

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

Question 10

This figure is used in questions .  
-The structure shown in the figure above represents a

Accepted Answer

A) glucopyranose. 
B) ribofuranose. 
C) myo-inositol. 
D) fructofuranose. 
E) glucofuranose. 
A) glucopyranose. 
B) ribofuranose. 
C) myo-inositol. 
D) fructofuranose. 
E) glucofuranose.

Question 11

The bonding of alcohols to the anomeric center of a carbohydrate results in the formation of a(n)__________ bond.

Accepted Answer

A) anomeric 
B) amide 
C) glycosidic 
D) ester 
E) hydrogen 
A) anomeric 
B) amide 
C) glycosidic 
D) ester 
E) hydrogen

Question 12

Alcohols react with aldehydes to form

Accepted Answer

A) hemiketals. 
B) lactones. 
C) lactams. 
D) glycosides. 
E) hemiacetals. 
A) hemiketals. 
B) lactones. 
C) lactams. 
D) glycosides. 
E) hemiacetals.

Question 13

Bacterial cell walls are composed of _____.

Accepted Answer

A) pectin 
B) chondroitin sulfate chains 
C) peptidoglycans 
D) heparin 
E) proteoglycans 
A) pectin 
B) chondroitin sulfate chains 
C) peptidoglycans 
D) heparin 
E) proteoglycans

Question 14

Which of the following sequences represents a recognition site for N-linked glycosylation where X is any amino acid except Pro?

Accepted Answer

A) Gln-X-Ser 
B) His-X-Ser 
C) Arg-X-Ser 
D) Asn-X-Ser 
E) Asp-X-Ser 
A) Gln-X-Ser 
B) His-X-Ser 
C) Arg-X-Ser 
D) Asn-X-Ser 
E) Asp-X-Ser

Question 15

This figure is used in questions .  
-Which structure shown in the figure above is a ketohexose?

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 16

This figure is used in questions  
-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

Question 17

Which of the following is a disaccharide?

Accepted Answer

A) amylose 
B) saccharin 
C) aspartame 
D) amylopectin 
E) none of the above 
A) amylose 
B) saccharin 
C) aspartame 
D) amylopectin 
E) none of the above

Question 18

The structure below shows a Fischer projection of D-idose.   
Which of the structures below represents $\beta$-D-idopyranose

Accepted Answer

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

Question 19

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 20

We encounter a great variety of sugars in living organisms.
a.Draw a Haworth projection of an aldohexose in the pyranose form (include all atoms).
b.Draw the Haworth projection of the anomer of the aldose you drew in "a" above.
c.Draw a circle around the carbon that determines whether this sugar is a D or an L sugar.
d.How many chiral carbon atoms are present in each of the structures drawn in "a" and
b" above?
e.How many stereoisomers exist for these pyranoses?

Accepted Answer

a.see drawing @#IMG-DLM& b.see

Exam 8: Carbohydrates

Which of the following is the most abundant disaccharide?

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

Matching -Both α\alphaα (1 →\to→ 4)and α\alphaα (1 →\to→ 6)bonds can be found in the plant product______.

Which of the following polysaccharides cannot be digested by mammalian salivary, gastric, or pancreatic enzymes?

Which of the following statements applies to all artificial sweeteners?

This figure is used in questions . -The configuration around which carbon atom shown in the figure above determines whether this is a D or an L sugar?

Which of the following is an example of a heteropolysaccharide?

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

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

This figure is used in questions . -The structure shown in the figure above represents a

The bonding of alcohols to the anomeric center of a carbohydrate results in the formation of a(n)__________ bond.

Alcohols react with aldehydes to form

Bacterial cell walls are composed of _____.

Which of the following sequences represents a recognition site for N-linked glycosylation where X is any amino acid except Pro?

This figure is used in questions . -Which structure shown in the figure above is a ketohexose?

This figure is used in questions -Which of the sugars shown in the figure above are L sugars?

Which of the following is a disaccharide?

The structure below shows a Fischer projection of D-idose. Which of the structures below represents β\betaβ -D-idopyranose

Glycoproteins

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

Glycogen Metabolism and Gluconeogenesis

Glucose Catabolism

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

Translation

Regulation of Gene Expression

Filters

Matching -Both $\alpha$ (1 $\to$ 4)and $\alpha$ (1 $\to$ 6)bonds can be found in the plant product______.

The structure below shows a Fischer projection of D-idose. $The structure below shows a Fischer projection of D-idose. Which of the structures below represents \beta -D-idopyranose$ Which of the structures below represents $\beta$ -D-idopyranose