Question 1

What is the composition of sucrose?

Accepted Answer

A)   two glucose units with a -1,4'-glycoside bond
B)   one glucose and one fructose unit with a -glycosidic bond to the 2'carbon of a fructofuranose ring
C)   one galactose and one glucose unit with a -1,4'-glycoside bond
D)   repeating unit of glucose units joined in a -1,4'-glycosidic linkageE) C) and D)
F) All of the above

Question 2

Which of the following reagents will selectively oxidize an aldose to an aldonic acid?

Accepted Answer

A)   PCC
B)   Ag2O in NH4OH
C)   FeCl3
D)   HNO3E) A) and D)
F) B) and D)

Question 3

Which of the following compounds is an aldose?

Accepted Answer

A)   A
B)   B
C)   C
D)   DE) A) and B)
F) A) and C)

Question 4

Which of the following sugars can be classified as an aldohexose?

Accepted Answer

A)   A
B)   B
C)   C
D)   DE) B) and C)
F) All of the above

Question 5

How many carbons does a pentose sugar have?

Accepted Answer

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

Question 6

What is the correct chair form for the  anomer of D-glucose?  anomer of D-glucose?   A)  A B)  B C)  C D)  D" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   A
B)   B
C)   C
D)   DE) C) and D)
F) B) and D)

Question 7

From the disaccharides listed below, which one will not undergo mutarotation?

Accepted Answer

A)   sucrose
B)   maltose
C)   lactose
D)   xylobioseE) All of the above
F) A) and C)

Question 8

Which of the following is a reducing sugar?

Accepted Answer

A)   A
B)   B
C)   C
D)   DE) B) and C)
F) A) and D)

Question 9

Which of the following sugars can be classified as a ketopentose?

Accepted Answer

A)   A
B)   B
C)   C
D)   DE) A) and B)
F) All of the above

Question 10

Which of the following reagents would convert glucose into ethyl glucopyranoside?

Accepted Answer

A)   EtBr, aq. HCl
B)   EtOH, aq. HCl
C)   EtOH, NaOH
D)   Ag2O in NH4OHE) None of the above
F) All of the above

Question 11

Which is the correct Haworth projection for the  anomer of allose?  anomer of allose?   A)  A B)  B C)  C D)  D" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   A
B)   B
C)   C
D)   DE) A) and C)
F) None of the above

Question 12

The branching units in amylopectin, a polysaccharide, which enable this molecule to be water soluble are connected with __________________________ linkages.

Accepted Answer

A)   "-1,4'-glycosidic"
B)   "-1,4'-glycosidic"
C)   "-1,6'-glycosidic"
D)   "-1,6'-glycosidic"E) A) and D)
F) B) and D)

Question 13

Which of the following best describes the relationship between D-glucose and D-fructose?

Accepted Answer

A)   enantiomers
B)   epimers
C)   anomers
D)   constitutional isomersE) B) and D)
F) B) and C)

Question 14

What is the process called for the interconversion of one anomer to the other?

Accepted Answer

A)   racemization
B)   mutarotation
C)   epimerization
D)   enolizationE) C) and D)
F) B) and D)

Question 15

From the sugars shown below, which one is a non-reducing sugar?

Accepted Answer

A)   A
B)   B
C)   C
D)   DE) A) and B)
F) B) and D)

Question 16

Upon hydrolysis of cellulose, what sugar is formed?

Accepted Answer

A)   sucrose
B)   maltose
C)   lactose
D)   glucoseE) A) and B)
F) A) and C)

Question 17

From the sugars shown below, which one will not give a positive test with Tollens reagent?

Accepted Answer

A)   A
B)   B
C)   C
D)   DE) None of the above
F) A) and C)

Question 18

Which of the following compounds is not a valid representation for D-glucose?

Accepted Answer

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

Question 19

Which of the following sugars can be classified as a ketotetrose?

Accepted Answer

A)   A
B)   B
C)   C
D)   DE) None of the above
F) A) and B)

Question 20

What is the best description of the product formed in the following reaction sequence?

Accepted Answer

A)   The product is an optically active aldonic acid.
B)   The product is an optically inactive aldonic acid.
C)   The product is an optically active aldaric acid.
D)   The product is an optically inactive aldaric acid.E) A) and C)
F) A) and D)

Exam 28: Carbohydrates

From the disaccharides listed below, which one will not undergo mutarotation?

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Which of the following reagents would convert glucose into ethyl glucopyranoside?

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What is the process called for the interconversion of one anomer to the other?

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The branching units in amylopectin, a polysaccharide, which enable this molecule to be water soluble are connected with __________________________ linkages.

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Which of the following is a reducing sugar?

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Which of the following best describes the relationship between D-glucose and D-fructose?

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How many carbons does a pentose sugar have?

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From the sugars shown below, which one is a non-reducing sugar?

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What is the correct chair form for the  anomer of D-glucose?

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From the sugars shown below, which one will not give a positive test with Tollens reagent?

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Which of the following sugars can be classified as a ketopentose?

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Which of the following compounds is an aldose?

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Which of the following sugars can be classified as a ketotetrose?

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Which of the following reagents will selectively oxidize an aldose to an aldonic acid?

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Upon hydrolysis of cellulose, what sugar is formed?

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What is the composition of sucrose?

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Which of the following sugars can be classified as an aldohexose?

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What is the best description of the product formed in the following reaction sequence?

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Which of the following compounds is not a valid representation for D-glucose?

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Which is the correct Haworth projection for the  anomer of allose?

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