Question 1

The configurations at C2, C3, and C4 of  are:

Accepted Answer

A)   2R, 3R, 4R
B)   2R, 3S, 4R
C)   2S, 3R, 4S
D)   2S, 3R, 4R
E)   2R, 3S, 4SF) C) and E)
G) A) and B)

Question 2

The product of the following reaction sequence is:

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) B) and C)
G) A) and E)

Question 3

D-Glucose can exist in how many isomeric cyclic hemiacetal forms?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5F) B) and E)
G) A) and E)

Question 4

Which of the following compounds will give a positive Tollens' test (silver mirror) ?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) All of the above
G) B) and E)

Question 5

Starch is a polysaccharide that is found in many food sources.When starch is completely hydrolyzed, the monosaccharide that is produced is:

Accepted Answer

A)   glucose
B)   mannose
C)   maltose
D)   galactose
E)   amyloseF) A) and B)
G) B) and D)

Question 6

The pyranose form of glucose is a(n) :

Accepted Answer

A)   linear aldehyde
B)   cyclic hemiacetal
C)   cyclic acetal
D)   acyclic acetal
E)   acyclic hemiacetalF) B) and C)
G) All of the above

Question 7

The Haworth projection formula for the pyranose form of  β\betaβ -D-galactose is:

Accepted Answer

A)   
B)   
C)   
D)   
E)    F) D) and E)
G) C) and D)

Question 8

The linkage between the sugar units in starch are:

Accepted Answer

A)   ( α\alphaα ) 
B)   ( β\betaβ ) 
C)   ( γ\gammaγ ) 
D)  (  δ \delta δ ) 
E)   none of these F) B) and D)
G) D) and E)

Question 9

Reduction of an optically active aldopentose with NaBH4 gives an optically inactive alditol.The aldopentose could be:

Accepted Answer

A)   4 gives an optically inactive alditol.The aldopentose could be: 
A)     
B)     
C)     
D)     
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B)   4 gives an optically inactive alditol.The aldopentose could be: 
A)     
B)     
C)     
D)     
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C)   4 gives an optically inactive alditol.The aldopentose could be: 
A)     
B)     
C)     
D)     
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D)   4 gives an optically inactive alditol.The aldopentose could be: 
A)     
B)     
C)     
D)     
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E)   4 gives an optically inactive alditol.The aldopentose could be: 
A)     
B)     
C)     
D)     
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G) B) and D) C

Question 10

How many stereogenic centers are in the  β\betaβ -cyclic form of glucose?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5 F) All of the above
G) B) and C)

Question 11

Reduction of which of the following aldoses provides an optically active alditol?

Accepted Answer

A)   1
B)   2
C)   3
D)   1 and 2
E)   3 and 4F) A) and E)
G) A) and C)

Question 12

The anomeric carbon of  is:

Accepted Answer

A)   C1
B)   C2
C)   C3
D)   C5
E)   C6F) D) and E)
G) C) and D)

Question 13

The difference between the pyranose and furanose forms of a given aldohexose is:

Accepted Answer

A)   the ring size
B)   the number of the anomeric C
C)   the type of functional groups
D)   the number of functional groups
E)   there is no differenceF) All of the above
G) C) and E)

Question 14

The difference between  α\alphaα  and  β\betaβ -glucopyranose is:

Accepted Answer

A)   the stereochemistry at the anomeric carbon
B)   the number of carbons in the ring
C)   the position of all the OH's on the ring
D)   all of these reasons
E)   none of these reasons F) C) and D)
G) B) and E) A

Question 15

The structure of an L-aldotetrose that would give an optically inactive alditol upon reduction with sodium borohydride (NaBH4)  is:

Accepted Answer

A)   4)  is: 
A)     
B)     
C)     
D)     
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B)   4)  is: 
A)     
B)     
C)     
D)     
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C)   4)  is: 
A)     
B)     
C)     
D)     
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D)   4)  is: 
A)     
B)     
C)     
D)     
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E)   4)  is: 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) A) and B)
G) A) and E) D

Question 16

Which of the following can be classified as an aldopentose?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   3 and 4F) A) and E)
G) All of the above

Question 17

The product of   is: A)    B)    C)    D)    E)   " class="answers-bank-image d-inline" rel="preload" >   is:

Accepted Answer

A)     is: 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)     is: 
A)     
B)     
C)     
D)     
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C)     is: 
A)     
B)     
C)     
D)     
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D)     is: 
A)     
B)     
C)     
D)     
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E)     is: 
A)     
B)     
C)     
D)     
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G) A) and E)

Question 18

A 1,4- α\alphaα -linkage between two glucose units produces a disaccharide called:

Accepted Answer

A)   dextrose
B)   cellobiose
C)   ribose
D)   maltose
E)   amylose F) C) and E)
G) A) and D)

Question 19

Hydrolysis of lactose gives:

Accepted Answer

A)   glucose and galactose
B)   glucose and fructose
C)   mannose and fructose
D)   galactose and fructose
E)   allose and mannoseF) B) and E)
G) A) and B)

Question 20

The anomeric carbon in the structure below is numbered:

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5F) All of the above
G) C) and D)

Exam 16: Carbohydrates

The configurations at C2, C3, and C4 of are:

Correct AnswerverifiedShow Answer

The product of the following reaction sequence is:

Correct AnswerverifiedShow Answer

D-Glucose can exist in how many isomeric cyclic hemiacetal forms?

Correct AnswerverifiedShow Answer

Which of the following compounds will give a positive Tollens' test (silver mirror) ?

Correct AnswerverifiedShow Answer

Starch is a polysaccharide that is found in many food sources.When starch is completely hydrolyzed, the monosaccharide that is produced is:

Correct AnswerverifiedShow Answer

The pyranose form of glucose is a(n) :

Correct AnswerverifiedShow Answer

The Haworth projection formula for the pyranose form of β\betaβ -D-galactose is:

Correct AnswerverifiedShow Answer

The linkage between the sugar units in starch are:

Correct AnswerverifiedShow Answer

Reduction of an optically active aldopentose with NaBH4 gives an optically inactive alditol.The aldopentose could be:

Correct AnswerverifiedC

How many stereogenic centers are in the β\betaβ -cyclic form of glucose?

Correct AnswerverifiedShow Answer

Reduction of which of the following aldoses provides an optically active alditol?

Correct AnswerverifiedShow Answer

The anomeric carbon of is:

Correct AnswerverifiedShow Answer

The difference between the pyranose and furanose forms of a given aldohexose is:

Correct AnswerverifiedShow Answer

The difference between α\alphaα and β\betaβ -glucopyranose is:

Correct AnswerverifiedA

The structure of an L-aldotetrose that would give an optically inactive alditol upon reduction with sodium borohydride (NaBH4) is:

Correct AnswerverifiedD

Which of the following can be classified as an aldopentose?

Correct AnswerverifiedShow Answer

The product of is:

Correct AnswerverifiedShow Answer

A 1,4- α\alphaα -linkage between two glucose units produces a disaccharide called:

Correct AnswerverifiedShow Answer

Hydrolysis of lactose gives:

Correct AnswerverifiedShow Answer

The anomeric carbon in the structure below is numbered:

Correct AnswerverifiedShow Answer

Correct Answer
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The Haworth projection formula for the pyranose form of $\beta$ -D-galactose is: $The Haworth projection formula for the pyranose form of \beta -D-galactose is: A) B) C) D) E)$

Correct Answer
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Correct Answer
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Reduction of an optically active aldopentose with NaBH₄ gives an optically inactive alditol.The aldopentose could be:

Correct Answer
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C

How many stereogenic centers are in the $\beta$ -cyclic form of glucose?

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The difference between $\alpha$ and $\beta$ -glucopyranose is:

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A

The structure of an L-aldotetrose that would give an optically inactive alditol upon reduction with sodium borohydride (NaBH₄) is:

Correct Answer
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D

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A 1,4- $\alpha$ -linkage between two glucose units produces a disaccharide called:

Correct Answer
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