Question 1

D-mannose when subjected to Wohl degradation followed by Br2/H2O produces the same aldonic acid as does______ when treated with Br2/H2O.

Accepted Answer

A)  D-arabinose 
B)  D-ribose 
C)  D-xylose 
D)  D-lyxose 
E)  D-threose 
A)  D-arabinose 
B)  D-ribose 
C)  D-xylose 
D)  D-lyxose 
E)  D-threose

Question 2

What is the correct Haworth projection for $\alpha$-D-glucopyranose?

Accepted Answer

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

Question 3

Furanose forms of monosaccharides are_____.

Accepted Answer

A)  5-membered cyclic hemiacetals 
B)  6-membered cyclic acetals 
C)  5-membered cyclic acetals 
D)  6-membered cyclic hemiacetals 
E)  none of these 
A)  5-membered cyclic hemiacetals 
B)  6-membered cyclic acetals 
C)  5-membered cyclic acetals 
D)  6-membered cyclic hemiacetals 
E)  none of these

Question 4

Which of the following compounds would produce D-glucose and D-mannose when subjected to Kiliani-Fischer synthesis?

Accepted Answer

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

Question 5

Identify the classification for D-threose.

Accepted Answer

A)  aldotetrose 
B)  ketotetrose 
C)  aldopentose 
D)  ketopentose 
E)  aldohexose 
A)  aldotetrose 
B)  ketotetrose 
C)  aldopentose 
D)  ketopentose 
E)  aldohexose

Question 6

Which one of the following is the correct stereochemical configuration for D-mannose?

Accepted Answer

A)  2S,3S,4R,5R 
B)  2R,3S,4R,5S 
C)  2R,3R,4S,5S 
D)  2S,3S,4R,5S 
E)  2S,3R,4S,5R 
A)  2S,3S,4R,5R 
B)  2R,3S,4R,5S 
C)  2R,3R,4S,5S 
D)  2S,3S,4R,5S 
E)  2S,3R,4S,5R

Question 7

Predict the product(s) for the following Wohl degradation.

Accepted Answer

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

Question 8

Draw the chair conformation for the following monosaccharide.

Accepted Answer

The answer of Draw the chair conformation for the following...

Question 9

Which of the following is an aldohexose?

Accepted Answer

A)  D-lyxose 
B)  D-fructose 
C)  D-ribose 
D)  D-glucose 
E)  D-xylulose 
A)  D-lyxose 
B)  D-fructose 
C)  D-ribose 
D)  D-glucose 
E)  D-xylulose

Question 10

Five-membered cyclic hemiacetal carbohydrates are called ________.

Accepted Answer

A)  furanose 
B)  pyranose 
C)  ketohexose 
D)  aldohexose 
E)  none of these 
A)  furanose 
B)  pyranose 
C)  ketohexose 
D)  aldohexose 
E)  none of these

Question 11

How many stereoisomers are possible for an aldohexose?

Accepted Answer

A)  8 
B)  16 
C)  10 
D)  12 
E)  4 
A)  8 
B)  16 
C)  10 
D)  12 
E)  4

Question 12

Which one of the following is the correct stereochemical configuration for D-xylose?

Accepted Answer

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

Question 13

All natural occurring sugars are ______.

Accepted Answer

A)  D sugars 
B)  L sugars 
C)  both D and L sugars 
A)  D sugars 
B)  L sugars 
C)  both D and L sugars

Question 14

Epimers are diastereomers that differ from each other in the configuration of ____ chiral center(s).

Accepted Answer

The answer of Epimers are diastereomers that differ from each...

Question 15

Which of the following disaccharides is(are) $\beta$-galactoside(s)?

Accepted Answer

A)  sucrose 
B)  maltose 
C)  lactose 
D)  cellobiose 
E)  both A and B 
A)  sucrose 
B)  maltose 
C)  lactose 
D)  cellobiose 
E)  both A and B

Question 16

Provide the reagents necessary to carry out the following conversion.

Accepted Answer

The answer of Provide the reagents necessary to carry out...

Question 17

Six-membered cyclic hemiacetal carbohydrates are called ________.

Accepted Answer

A)  furanose 
B)  pyranose 
C)  ketopentose 
D)  aldopentose 
E)  none of these 
A)  furanose 
B)  pyranose 
C)  ketopentose 
D)  aldopentose 
E)  none of these

Question 18

When an optically active D-aldopentose was subjected to Kiliani-Fischer synthesis, followed by NaBH4/H2O, it produced a mixture of an optically active and an optically inactive alditol. When the same D-aldopentose was subjected to Wohl degradation followed by HNO3 it produced an optically inactive aldaric acid. Provide the structure of this D-aldopentose.

Accepted Answer

Question 19

The main difference between cellulose and chitin is that:

Accepted Answer

A)  Cellulose has $\beta$-glycosidic linkages; chitin has $\alpha$-glycosidic linkages. 
B)  Cellulose has $\alpha$-glycosidic linkages; chitin has $\beta$-glycosidic linkages. 
C)  Cellulose is composed of D-glucose units; chitin is composed of an N-acetyl derivative of glucose, glucosamine. 
D)  Cellulose has a linear structure; chitin has a helical structure. 
E)  Cellulose has 1,6 branching; chitin has no branching. 
A)  Cellulose has $\beta$-glycosidic linkages; chitin has $\alpha$-glycosidic linkages. 
B)  Cellulose has $\alpha$-glycosidic linkages; chitin has $\beta$-glycosidic linkages. 
C)  Cellulose is composed of D-glucose units; chitin is composed of an N-acetyl derivative of glucose, glucosamine. 
D)  Cellulose has a linear structure; chitin has a helical structure. 
E)  Cellulose has 1,6 branching; chitin has no branching.

Question 20

Which one of the following is a correct structure for $\alpha$-maltose?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  none of these 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  none of these

Exam 24: Carbohydrates

D-mannose when subjected to Wohl degradation followed by Br2/H2O produces the same aldonic acid as does______ when treated with Br2/H2O.

What is the correct Haworth projection for α\alphaα -D-glucopyranose?

Furanose forms of monosaccharides are_____.

Which of the following compounds would produce D-glucose and D-mannose when subjected to Kiliani-Fischer synthesis?

Identify the classification for D-threose.

Which one of the following is the correct stereochemical configuration for D-mannose?

Predict the product(s) for the following Wohl degradation.

Draw the chair conformation for the following monosaccharide.

Which of the following is an aldohexose?

Five-membered cyclic hemiacetal carbohydrates are called ________.

How many stereoisomers are possible for an aldohexose?

Which one of the following is the correct stereochemical configuration for D-xylose?

All natural occurring sugars are ______.

Epimers are diastereomers that differ from each other in the configuration of ____ chiral center(s).

Which of the following disaccharides is(are) β\betaβ -galactoside(s)?

Provide the reagents necessary to carry out the following conversion.

Six-membered cyclic hemiacetal carbohydrates are called ________.

The main difference between cellulose and chitin is that:

Which one of the following is a correct structure for α\alphaα -maltose?

A Review of General Chemistry: Electrons, Bonds, and Molecular Properties

Molecular Representations

Acids and Bases

Alkanes and Cycloalkanes

Stereoisomerism

Chemical Reactivity and Mechanisms

Alkyl Halides: Nucleophilic Substitution and Elimination Reactions

Addition Reactions of Alkenes

Alkynes

Radical Reactions

Synthesis

Alcohols and Phenols

Ethers and Epoxides; Thiols and Sulfides

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Conjugated Pi Systems and Pericyclic Reactions

Aromatic Compounds

Aromatic Substitution Reactions

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Alpha Carbon Chemistry: Enols and Enolates

Amines

Introduction to Organometallic Compounds

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

D-mannose when subjected to Wohl degradation followed by Br₂/H₂O produces the same aldonic acid as does______ when treated with Br₂/H₂O.

What is the correct Haworth projection for $\alpha$ -D-glucopyranose? $What is the correct Haworth projection for \alpha -D-glucopyranose?$ $What is the correct Haworth projection for \alpha -D-glucopyranose?$ $What is the correct Haworth projection for \alpha -D-glucopyranose?$

Which of the following disaccharides is(are) $\beta$ -galactoside(s)?

Which one of the following is a correct structure for $\alpha$ -maltose? $Which one of the following is a correct structure for \alpha -maltose?$ $Which one of the following is a correct structure for \alpha -maltose?$