Question 1

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

Accepted Answer

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

Question 2

Which of the following is D-fructose?

Accepted Answer

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

Question 3

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 4

Which of the following is D-sorbose?

Accepted Answer

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

Question 5

Which of the following pairs of carbohydrates will afford the same product from a Wohl degradation?

Accepted Answer

A) Xylose/glucose 
B) Ribose/arabinose 
C) Fructose/mannose 
D) Lyxose/threose 
A) Xylose/glucose 
B) Ribose/arabinose 
C) Fructose/mannose 
D) Lyxose/threose

Question 6

What is the correct chair form for the aanomer of D-mannose?

Accepted Answer

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

Question 7

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

Accepted Answer

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

Question 8

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 9

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 10

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 11

Oxidation of a D-hexose with nitric acid forms an optically active aldaric acid.A Wohl degradation of the same D-hexose followed by oxidation with nitric acid forms an optically active aldaric acid.What are the three possible D-hexoses that fit this data?

Accepted Answer

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

Question 12

Does a monosaccharide prefer to exist in the open-chain or closed-ring form?

Accepted Answer

A) Open 
B) Closed 
C) Both forms exist in equal ratios. 
A) Open 
B) Closed 
C) Both forms exist in equal ratios.

Question 13

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 14

Upon hydrolysis of amylose,what sugar is formed?

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

What is the composition of maltose?

Accepted Answer

A) Two glucose units with a a-1,4'-glycoside bond 
B) One glucose and one fructose unit with a a-glycosidic bond to the 2' carbon of a fructofuranose ring 
C) One galactose and one glucose unit with a b-1,4'-glycoside bond 
D) Repeating unit of glucose units joined in a b-1,4'-glycosidic linkage 
A) Two glucose units with a a-1,4'-glycoside bond 
B) One glucose and one fructose unit with a a-glycosidic bond to the 2' carbon of a fructofuranose ring 
C) One galactose and one glucose unit with a b-1,4'-glycoside bond 
D) Repeating unit of glucose units joined in a b-1,4'-glycosidic linkage

Question 17

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 18

Which of the following is a disaccharide?

Accepted Answer

A) Maltose 
B) Lactose 
C) Sucrose 
D) All of these choices are correct 
A) Maltose 
B) Lactose 
C) Sucrose 
D) All of these choices are correct

Question 19

What is the composition of lactose?

Accepted Answer

A) Two glucose units with a a-1,4'-glycoside bond 
B) One glucose and one fructose unit with a a-glycosidic bond to the 2' carbon of a fructofuranose ring 
C) One galactose and one glucose unit with a b-1,4'-glycoside bond 
D) Repeating unit of glucose units joined in a b-1,4'-glycosidic linkage 
A) Two glucose units with a a-1,4'-glycoside bond 
B) One glucose and one fructose unit with a a-glycosidic bond to the 2' carbon of a fructofuranose ring 
C) One galactose and one glucose unit with a b-1,4'-glycoside bond 
D) Repeating unit of glucose units joined in a b-1,4'-glycosidic linkage

Question 20

What is the composition of sucrose?

Accepted Answer

A) Two glucose units with a a-1,4'-glycoside bond 
B) One glucose and one fructose unit with a a-glycosidic bond to the 2' carbon of a fructofuranose ring 
C) One galactose and one glucose unit with a b-1,4'-glycoside bond 
D) Repeating unit of glucose units joined in a b-1,4'-glycosidic linkage 
A) Two glucose units with a a-1,4'-glycoside bond 
B) One glucose and one fructose unit with a a-glycosidic bond to the 2' carbon of a fructofuranose ring 
C) One galactose and one glucose unit with a b-1,4'-glycoside bond 
D) Repeating unit of glucose units joined in a b-1,4'-glycosidic linkage

Exam 26: Carbohydrates

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

Which of the following is D-fructose?

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

Which of the following is D-sorbose?

Which of the following pairs of carbohydrates will afford the same product from a Wohl degradation?

What is the correct chair form for the aanomer of D-mannose?

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

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

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

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

Oxidation of a D-hexose with nitric acid forms an optically active aldaric acid.A Wohl degradation of the same D-hexose followed by oxidation with nitric acid forms an optically active aldaric acid.What are the three possible D-hexoses that fit this data?

Does a monosaccharide prefer to exist in the open-chain or closed-ring form?

Which of the following is a reducing sugar?

Upon hydrolysis of amylose,what sugar is formed?

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

What is the composition of maltose?

How many carbons does a pentose sugar have?

Which of the following is a disaccharide?

What is the composition of lactose?

What is the composition of sucrose?

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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