Question 1

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

Question 2

Which of the following is a reducing sugar?

Accepted Answer

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

Question 3

Which is the correct Haworth projection for the F1F1F1S1F1F1F10 anomer of allose?

Accepted Answer

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

Question 4

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

Question 5

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 6

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

Accepted Answer

A)  "F1F1F1S1F1F1F10-1,4'-glycosidic" 
B)  "F1F1F1S1F1F1F10-1,4'-glycosidic" 
C)  "F1F1F1S1F1F1F10-1,6'-glycosidic" 
D)  "F1F1F1S1F1F1F10-1,6'-glycosidic" 
A)  "F1F1F1S1F1F1F10-1,4'-glycosidic" 
B)  "F1F1F1S1F1F1F10-1,4'-glycosidic" 
C)  "F1F1F1S1F1F1F10-1,6'-glycosidic" 
D)  "F1F1F1S1F1F1F10-1,6'-glycosidic"

Question 7

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 8

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

Accepted Answer

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

Question 9

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

Accepted Answer

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

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

Question 11

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. 
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 12

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 
A)  PCC 
B)  Ag2O in NH4OH 
C)  FeCl3 
D)  HNO3

Question 13

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

Question 14

How many carbons does a pentose sugar have?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
A)  2 
B)  3 
C)  4 
D)  5

Question 15

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

Accepted Answer

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

Question 16

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 17

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

Accepted Answer

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

Question 18

What is the composition of sucrose?

Accepted Answer

A)  two glucose units with a F1F1F1S1F1F1F10-1,4'-glycoside bond 
B)  one glucose and one fructose unit with a F1F1F1S1F1F1F10-glycosidic bond to the 2'carbon of a fructofuranose ring 
C)  one galactose and one glucose unit with a F1F1F1S1F1F1F10-1,4'-glycoside bond 
D)  repeating unit of glucose units joined in a F1F1F1S1F1F1F10-1,4'-glycosidic linkage 
A)  two glucose units with a F1F1F1S1F1F1F10-1,4'-glycoside bond 
B)  one glucose and one fructose unit with a F1F1F1S1F1F1F10-glycosidic bond to the 2'carbon of a fructofuranose ring 
C)  one galactose and one glucose unit with a F1F1F1S1F1F1F10-1,4'-glycoside bond 
D)  repeating unit of glucose units joined in a F1F1F1S1F1F1F10-1,4'-glycosidic linkage

Question 19

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

Question 20

What is the correct chair form for the F1F1F1S1F1F1F10 anomer of D-glucose?

Accepted Answer

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

Exam 28: Carbohydrates

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

Which of the following is a reducing sugar?

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

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

Which of the following compounds is an aldose?

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

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

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

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

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

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

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

Upon hydrolysis of cellulose, what sugar is formed?

How many carbons does a pentose sugar have?

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

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

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

What is the composition of sucrose?

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

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

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 Epoxides

Alkenes

Alkynes

Oxidation and Reduction

Mass Spectrometry and Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Radical Reactions

Conjugation, Resonance, and Dienes

Benzene and Aromatic Compounds

Electrophilic Aromatic Substitution

Carboxylic Acids and the Acidity of the O-H Bond

Introduction to Carbonyl Chemistry; Organometallic Reagents; Oxidation and Reduction

Aldehydes and Ketones Nucleophilic Addition

Carboxylic Acids and Derivatives

Substitution Reactions of Carbonyl Compounds at the Alpha-Carbon

Carbonyl Condensation Reactions

Amines

Carbon-Carbon Bond Forming Reactions in Organic Synthesis

Pericyclic Reactions

Amino Acids and Proteins

Lipids

Synthetic Polymers

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