Question 1

Which of the following compounds is a b anomer?

Accepted Answer

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

Question 2

What are the products of the following reaction?

Accepted Answer

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

Question 3

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

Question 4

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

Accepted Answer

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

Question 5

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

Question 6

The following reaction is an example of a base-catalyzed epimerization reaction in which a ketose is converted to a pair of aldoses.What are the products from this reaction?

Accepted Answer

A) D-glucose and D-mannose 
B) D-galactose and D-talose 
C) D-talose and D-idose 
D) D-glucose and D-idose 
A) D-glucose and D-mannose 
B) D-galactose and D-talose 
C) D-talose and D-idose 
D) D-glucose and D-idose

Question 7

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

Accepted Answer

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

Question 8

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

Question 9

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

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

Question 11

Which sugar is represented by the line angle structure below?

Accepted Answer

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

Question 12

After a series of Kiliani-Fischer syntheses on D-glyceraldehyde,an unknown sugar was isolated from the reaction mixture.The following experimental data was obtained.What is the structure of this unknown sugar? Data:
- Molecular formula: C6H12O6
- Reacts with phenylhydrazine to give an osazone,mp 178°C.
- Reacts with HNO3 to give an optically active aldaric acid.
- Wohl degradation followed by HNO3 oxidation gives an optically inactive
Aldaric acid.
- Two Wohl degradations followed by HNO3 oxidation give a meso-tartaric acid.

Accepted Answer

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

Question 13

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

Question 14

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

Question 15

What is the Haworth projection of the α anomer of a monosaccharide epimeric with D-glucose at C3?

Accepted Answer

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

Question 16

How many possible stereoisomers are there of the following heptose?

Accepted Answer

A) 16 
B) 21 
C) 32 
D) 64 
A) 16 
B) 21 
C) 32 
D) 64

Question 17

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 
A) EtBr,aq.HCl 
B) EtOH,aq.HCl 
C) EtOH,NaOH 
D) Ag2O in NH4OH

Question 18

Which of the following compounds is an aldose?

Accepted Answer

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

Question 19

Which of the following is D-galactose?

Accepted Answer

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

Question 20

Upon hydrolysis of cellulose,what sugar is formed?

Accepted Answer

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

Exam 26: Carbohydrates

Which of the following compounds is a b anomer?

What are the products of the following reaction?

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

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

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

The following reaction is an example of a base-catalyzed epimerization reaction in which a ketose is converted to a pair of aldoses.What are the products from this reaction?

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

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

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

What is the classification of pyranose forms of monosaccharides?

Which sugar is represented by the line angle structure below?

Amylose is a polysaccharide with ________ linkages.

Cellulose is a polysaccharide with ________ linkages.

What is the Haworth projection of the α anomer of a monosaccharide epimeric with D-glucose at C3?

How many possible stereoisomers are there of the following heptose?

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

Which of the following compounds is an aldose?

Which of the following is D-galactose?

Upon hydrolysis of cellulose,what sugar is formed?

Structure and Bonding

Acids and Bases

Introduction to Organic Molecules and Functional Groups

Alkanes

Stereochemistry

Understanding Organic Reactions

Alkyl Halides and Nucleophilic Substitution

Alkyl Halides and Elimination Reactions

Alcohols,ethers,and Related Compounds

Alkenes and Addition Reactions

Alkynes and Synthesis

Oxidation and Reduction

Radical Reactions

Conjugation,resonance,and Dienes

Benzene and Aromatic Compounds

Reactions of Aromatic Compounds

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones - Nucleophilic Addition

Carboxylic Acids and the Acidity of the O-H Bond

Carboxylic Acids and Their Derivatives Nucleophilic Acyl Substitution

Substitution Reactions of Carbonyl Compounds at the a Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond-Forming Reactions in Organic Synthesis

Pericyclic Reactions

Amino Acids and Proteins

Synthetic Polymers

Lipids

Spectroscopy A: Mass Spectrometry

Spectroscopy B: Infrared Spectroscopy

Spectroscopy C: Nuclear Magnetic Resonance Spectroscopy

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