Question 1

What is the major organic product obtained from the following reaction?

Accepted Answer

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

Question 2

Complete the structure on the right so that it represents the pyranose form of the carbohydrate shown on the left as a Fischer projection. Place the substituents carefully so that their position in axial or equatorial positions accurately reflects the stereochemistry of the carbohydrate.

Accepted Answer

The answer of Complete the structure on the right so...

Question 3

From the sugars below, choose the one that best fits each description below. Place the letter of the sugar in the blank to the left of the description. There is only one correct answer for each question. 
-_____ is a D-sugar.

Accepted Answer

The answer of From the sugars below, choose the one...

Question 4

What is (are)  the major organic product(s)  obtained from the following reaction?

Accepted Answer

A)   only 1
B)   only 2
C)   only 2 and 3
D)   1, 2 and 3E) C) and D)
F) B) and C)

Question 5

Match the following compounds used to produce rayon and acetate rayon with the most appropriate roles.
-Causes fibers to dissolve in an alkali

Accepted Answer

A)  Sodium salt of xanthate ester
B)  Acetylated cellulose
C)  Carbon disulfide
D)  Dilute sulfuric acidE) All of the above
F) B) and C) A

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

From the sugars below, choose the one that best fits each description below. Place the letter of the sugar in the blank to the left of the description. There is only one correct answer for each question. 
-_____ is a deoxy sugar.

Accepted Answer

The answer of From the sugars below, choose the one...

Question 8

Which of the following is not a polysaccharide?

Accepted Answer

A)   amylose
B)   amylopectin
C)   glycogen
D)   ribuloseE) C) and D)
F) All of the above

Question 9

The following monosaccharide has ________ equatorial hydroxyl groups.

Accepted Answer

The answer of The following monosaccharide has ________ equatorial hydroxyl...

Question 10

Identify the given compound. ​

Accepted Answer

A)   β lactose
B)   β maltose
C)   α sucrose
D)   α maltoseE) None of the above
F) B) and D) A

Question 11

Consider the structure shown below.  The Haworth projection formula for the pyranose form of β-D-galactose is given below.

Accepted Answer

A) True 
 B)False

Question 12

What is the relationship between D-erythrose and D-threose?

Accepted Answer

A)   constitutional isomers
B)   enantiomers
C)   diastereomers
D)   tautomersE) A) and D)
F) B) and C)

Question 13

Which carbon in the following carbohydrate is the anomeric carbon?

Accepted Answer

A)   i
B)   ii
C)   iii
D)   ivE) B) and C)
F) All of the above

Question 14

What is the relationship between D-arabinose and L-arabinose?

Accepted Answer

A)   constitutional isomers
B)   enantiomers
C)   diastereomers
D)   tautomersE) A) and D)
F) A) and C)

Question 15

What is the major organic product obtained from the following reduction of glucose?

Accepted Answer

The answer of What is the major organic product obtained...

Question 16

From the sugars below, choose the one that best fits each description below. Place the letter of the sugar in the blank to the left of the description. There is only one correct answer for each question. 
-_____ is a sugar which yields a single alditol upon reduction.

Accepted Answer

b

Question 17

The formula for maltose is:  The number of the acetal carbon is _____.

Accepted Answer

The answer of The formula for maltose is:  The...

Question 18

What is the major organic product obtained from the reaction of glucose with glucose oxidase?

Accepted Answer

The answer of What is the major organic product obtained...

Question 19

What are the R/S stereochemical designations of C2 and C3 of D-erythrose?

Accepted Answer

A)   2R,3R
B)   2R,3S
C)   2S,3R
D)   2S,3SE) A) and B)
F) B) and C)

Question 20

A glycoside is formed upon reaction of glucopyranose with NaBH4.

Accepted Answer

A) True 
 B)False

Exam 25: Carbohydrates

What is the major organic product obtained from the following reaction?

Correct AnswerverifiedShow Answer

Complete the structure on the right so that it represents the pyranose form of the carbohydrate shown on the left as a Fischer projection. Place the substituents carefully so that their position in axial or equatorial positions accurately reflects the stereochemistry of the carbohydrate.

Correct AnswerverifiedShow Answer

From the sugars below, choose the one that best fits each description below. Place the letter of the sugar in the blank to the left of the description. There is only one correct answer for each question. -_____ is a D-sugar.

Correct AnswerverifiedShow Answer

What is (are) the major organic product(s) obtained from the following reaction?

Correct AnswerverifiedShow Answer

Match the following compounds used to produce rayon and acetate rayon with the most appropriate roles. -Causes fibers to dissolve in an alkali

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

From the sugars below, choose the one that best fits each description below. Place the letter of the sugar in the blank to the left of the description. There is only one correct answer for each question. -_____ is a deoxy sugar.

Correct AnswerverifiedShow Answer

Which of the following is not a polysaccharide?

Correct AnswerverifiedShow Answer

The following monosaccharide has ________ equatorial hydroxyl groups.

Correct AnswerverifiedShow Answer

Identify the given compound. ​

Correct AnswerverifiedA

Consider the structure shown below. The Haworth projection formula for the pyranose form of β-D-galactose is given below.

Correct AnswerverifiedShow Answer

What is the relationship between D-erythrose and D-threose?

Correct AnswerverifiedShow Answer

Which carbon in the following carbohydrate is the anomeric carbon?

Correct AnswerverifiedShow Answer

What is the relationship between D-arabinose and L-arabinose?

Correct AnswerverifiedShow Answer

What is the major organic product obtained from the following reduction of glucose?

Correct AnswerverifiedShow Answer

From the sugars below, choose the one that best fits each description below. Place the letter of the sugar in the blank to the left of the description. There is only one correct answer for each question. -_____ is a sugar which yields a single alditol upon reduction.

Correct Answerverifiedb

The formula for maltose is: The number of the acetal carbon is _____.

Correct AnswerverifiedShow Answer

What is the major organic product obtained from the reaction of glucose with glucose oxidase?

Correct AnswerverifiedShow Answer

What are the R/S stereochemical designations of C2 and C3 of D-erythrose?

Correct AnswerverifiedShow Answer

A glycoside is formed upon reaction of glucopyranose with NaBH4.

Correct AnswerverifiedShow Answer

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A

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

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Identify the given compound.

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A

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b

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A glycoside is formed upon reaction of glucopyranose with NaBH₄.

Correct Answer
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