Question 1

Which of the following disaccharides has an α-1,4-glycosidic bond?

Accepted Answer

A)  lactose 
B)  maltose 
C)  sucrose 
D)  all of these 
A)  lactose 
B)  maltose 
C)  sucrose 
D)  all of these

Question 2

Which of the following chemical reagents react with monosaccharides to form glycosides?

Accepted Answer

A)  alcohols 
B)  amines 
C)  hemiacetals 
D)  acetals 
A)  alcohols 
B)  amines 
C)  hemiacetals 
D)  acetals

Question 3

Which of the following disaccharides yields two molecules of glucose on complete hydrolysis?

Accepted Answer

A)  lactose 
B)  maltose 
C)  sucrose 
D)  none of these 
A)  lactose 
B)  maltose 
C)  sucrose 
D)  none of these

Question 4

Which of the following disaccharides has a β-1,4-glycosidic bond?

Accepted Answer

A)  lactose 
B)  maltose 
C)  sucrose 
D)  all of these 
A)  lactose 
B)  maltose 
C)  sucrose 
D)  all of these

Question 5

Including their enantiomeric pairs, how many different aldopentoses are present in nature?

Accepted Answer

A)  two 
B)  four 
C)  eight 
D)  sixteen 
A)  two 
B)  four 
C)  eight 
D)  sixteen

Question 6

Examine the given chemical structures.         Which of the following chemical structures is an aldohexose?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  None of these is an aldohexose. 
A)  A 
B)  B 
C)  C 
D)  D 
E)  None of these is an aldohexose.

Question 7

Which of the following statements is true of glucitol?

Accepted Answer

A)  It exists only as an open-chain structure. 
B)  It exists only as a ring structure. 
C)  It is almost as sweet as sucrose. 
D)  It has a terminal aldehyde group. 
A)  It exists only as an open-chain structure. 
B)  It exists only as a ring structure. 
C)  It is almost as sweet as sucrose. 
D)  It has a terminal aldehyde group.

Question 8

In which of the following solutions can glycosides be hydrolyzed?

Accepted Answer

A)  an aqueous acidic solution 
B)  an aqueous basic solution 
C)  an aqueous alcohol solution 
D)  all of these 
A)  an aqueous acidic solution 
B)  an aqueous basic solution 
C)  an aqueous alcohol solution 
D)  all of these

Question 9

Identify a common natural source of both glucose and fructose.

Accepted Answer

A)  milk 
B)  honey 
C)  eggs 
D)  meat 
A)  milk 
B)  honey 
C)  eggs 
D)  meat

Question 10

Approximately how much glycogen is stored in the body of a well-nourished adult human?

Accepted Answer

A)  250 g 
B)  350 g 
C)  450 g 
D)  550 g 
A)  250 g 
B)  350 g 
C)  450 g 
D)  550 g

Question 11

Examine the given chemical structures.         Which of the following chemical structures will form a pyranose ring?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  None of these structures will form a pyranose ring. 
A)  A 
B)  B 
C)  C 
D)  D 
E)  None of these structures will form a pyranose ring.

Question 12

Which of the following reactions is involved in the conversion of glucose to glucuronic acid?

Accepted Answer

A)  reduction at carbon 1 
B)  oxidation at carbon 1 
C)  reduction at carbon 6 
D)  oxidation at carbon 6 
A)  reduction at carbon 1 
B)  oxidation at carbon 1 
C)  reduction at carbon 6 
D)  oxidation at carbon 6

Question 13

Which of the following types of reactions is involved in the formation of a glycoside from a monosaccharide?

Accepted Answer

A)  condensation 
B)  hydrolysis 
C)  reduction 
D)  oxidation 
A)  condensation 
B)  hydrolysis 
C)  reduction 
D)  oxidation

Question 14

Which of the following is associated with hyperglycemia?

Accepted Answer

A)  type 2 diabetes 
B)  galactosemia 
C)  both of these 
D)  none of these 
A)  type 2 diabetes 
B)  galactosemia 
C)  both of these 
D)  none of these

Question 15

Which statement is true of a solution containing an equilibrium mixture of α-D-glucose and β-D-glucose?

Accepted Answer

A)  The solution has an equal amount of the two anomers. 
B)  The solution does not show optical activity. 
C)  Both of these statements are correct. 
D)  Neither of these statements is correct. 
A)  The solution has an equal amount of the two anomers. 
B)  The solution does not show optical activity. 
C)  Both of these statements are correct. 
D)  Neither of these statements is correct.

Question 16

What percentage of the body weight of animals is made up of carbohydrates?

Accepted Answer

A)  1% 
B)  5% 
C)  10% 
D)  15% 
A)  1% 
B)  5% 
C)  10% 
D)  15%

Question 17

Which of the following statements is true of the reducing properties of sugars?

Accepted Answer

A)  All monosaccharides and all disaccharides are nonreducing sugars. 
B)  All monosaccharides and all disaccharides are reducing sugars. 
C)  All disaccharides and some monosaccharides are nonreducing sugars. 
D)  All monosaccharides and some disaccharides are reducing sugars. 
A)  All monosaccharides and all disaccharides are nonreducing sugars. 
B)  All monosaccharides and all disaccharides are reducing sugars. 
C)  All disaccharides and some monosaccharides are nonreducing sugars. 
D)  All monosaccharides and some disaccharides are reducing sugars.

Question 18

Which of the following is true of the conformations of glucose and fructose in sucrose?

Accepted Answer

A)  Both fructose and glucose have α conformations. 
B)  Both fructose and glucose have β conformations. 
C)  Fructose has an α conformation, and glucose has a β conformation. 
D)  Fructose has a β conformation, and glucose has an α conformation. 
A)  Both fructose and glucose have α conformations. 
B)  Both fructose and glucose have β conformations. 
C)  Fructose has an α conformation, and glucose has a β conformation. 
D)  Fructose has a β conformation, and glucose has an α conformation.

Question 19

Which of the following reactions is involved in the conversion of glucose to glucitol?

Accepted Answer

A)  reduction at carbon 1 
B)  oxidation at carbon 1 
C)  reduction at carbon 6 
D)  oxidation at carbon 6 
A)  reduction at carbon 1 
B)  oxidation at carbon 1 
C)  reduction at carbon 6 
D)  oxidation at carbon 6

Question 20

Which of the following disaccharides has an α, β-1,2-glycosidic bond?

Accepted Answer

A)  lactose 
B)  maltose 
C)  sucrose 
D)  none of these 
A)  lactose 
B)  maltose 
C)  sucrose 
D)  none of these

Exam 19: Carbohydrates

Which of the following disaccharides has an α-1,4-glycosidic bond?

Which of the following chemical reagents react with monosaccharides to form glycosides?

Which of the following disaccharides yields two molecules of glucose on complete hydrolysis?

Which of the following disaccharides has a β-1,4-glycosidic bond?

Including their enantiomeric pairs, how many different aldopentoses are present in nature?

Examine the given chemical structures. Which of the following chemical structures is an aldohexose?

Which of the following statements is true of glucitol?

In which of the following solutions can glycosides be hydrolyzed?

Identify a common natural source of both glucose and fructose.

Approximately how much glycogen is stored in the body of a well-nourished adult human?

Examine the given chemical structures. Which of the following chemical structures will form a pyranose ring?

Which of the following reactions is involved in the conversion of glucose to glucuronic acid?

Which of the following types of reactions is involved in the formation of a glycoside from a monosaccharide?

Which of the following is associated with hyperglycemia?

Which statement is true of a solution containing an equilibrium mixture of α-D-glucose and β-D-glucose?

What percentage of the body weight of animals is made up of carbohydrates?

Which of the following statements is true of the reducing properties of sugars?

Which of the following is true of the conformations of glucose and fructose in sucrose?

Which of the following reactions is involved in the conversion of glucose to glucitol?

Which of the following disaccharides has an α, β-1,2-glycosidic bond?

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