Question 1

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)  D

Question 2

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

Accepted Answer

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

Question 3

Amylose is a polysaccharide with ________________________ linkages.

Accepted Answer

A)  b-1,4'-glycosidic
B)  a-1,4'-glycosidic
C)  b-1,6'-glycosidic
D)  a-1,6'-glycosidic

Question 4

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 NH4OH

Question 5

Cellulose is a polysaccharide with ________________________ linkages.

Accepted Answer

A)  b-1,4'-glycosidic
B)  a-1,4'-glycosidic
C)  b-1,6'-glycosidic
D)  a-1,6'-glycosidic

Question 6

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

Accepted Answer

A)  b-1,4'-glycosidic
B)  a-1,4'-glycosidic
C)  a-1,6'-glycosidic
D)  b-1,6'-glycosidic

Question 7

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.

Question 8

Which of the following is a reducing sugar?

Accepted Answer

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

Question 9

What is the Fischer projection of the monosaccharide from which the following glycoside was prepared?

Accepted Answer

A)  I
B)  II
C)  III
D)  IV

Question 10

What is the classification of pyranose forms of monosaccharides?

Accepted Answer

A)  5-Membered cyclic hemiacetals
B)  6-Membered cyclic acetals
C)  5-Membered cyclic acetals
D)  6-Membered cyclic hemiacetals

Question 11

Which is the correct Fischer projection for the open-chain form of the carbohydrate shown below?

Accepted Answer

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

Question 12

Which sugar is represented by the line angle structure below?

Accepted Answer

A)  D-fructose
B)  D-sorbose
C)  L-psicose
D)  L-tagatose

Question 13

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

Accepted Answer

A)  Racemization
B)  Mutarotation
C)  Epimerization
D)  Enolization

Question 14

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

Accepted Answer

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

Question 15

Which of the following compounds is an aldose?

Accepted Answer

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

Question 16

Which is the correct Haworth projection for the banomer of D-glucose?

Accepted Answer

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

Question 17

Which of the following compounds is a b anomer?

Accepted Answer

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

Question 18

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

Accepted Answer

A)  Sucrose
B)  Maltose
C)  Lactose
D)  Xylobiose A

Question 19

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

Accepted Answer

A)  Enantiomers
B)  Epimers
C)  Anomers
D)  Constitutional isomers

Question 20

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)  HNO3 B

Exam 28: Carbohydrates

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Amylose is a polysaccharide with ________________________ linkages.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cellulose is a polysaccharide with ________________________ linkages.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is a reducing sugar?

Correct AnswerverifiedShow Answer

What is the Fischer projection of the monosaccharide from which the following glycoside was prepared?

Correct AnswerverifiedShow Answer

What is the classification of pyranose forms of monosaccharides?

Correct AnswerverifiedShow Answer

Which is the correct Fischer projection for the open-chain form of the carbohydrate shown below?

Correct AnswerverifiedShow Answer

Which sugar is represented by the line angle structure below?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedE

Which of the following compounds is an aldose?

Correct AnswerverifiedShow Answer

Which is the correct Haworth projection for the banomer of D-glucose?

Correct AnswerverifiedShow Answer

Which of the following compounds is a b anomer?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedB

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E

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A

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B