Question 1

Disaccharides and polysaccharides contain monosaccharide units joined together by which of the following?

Accepted Answer

A) Hydrogen bonding 
B) Glycosidic linkages 
C) Hemiacetal bonds 
D) Dipole-dipole forces 
A) Hydrogen bonding 
B) Glycosidic linkages 
C) Hemiacetal bonds 
D) Dipole-dipole forces

Question 2

Carbohydrates serve important energy and structural roles for both plants and animals.

Accepted Answer

A) True 
 B)False

Question 3

Which labeled carbon atom in the structure below is the anomeric carbon?

Accepted Answer

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

Question 4

Gentobiose,a rare disaccharide found in saffron,produces two identical monosaccharides when it undergoes hydrolysis. What is the identity of the hydrolysis product?

Accepted Answer

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

Question 5

How many acetals and hemiacetals are present in the disaccharide below?

Accepted Answer

A) Two acetals are present. 
B) Two hemiacetals are present. 
C) One hemiacetal and one acetal is present 
D) No hemiacetals or acetals are present. 
A) Two acetals are present. 
B) Two hemiacetals are present. 
C) One hemiacetal and one acetal is present 
D) No hemiacetals or acetals are present.

Question 6

Which is not a glycosaminoglycan?

Accepted Answer

A) Hyaluronate 
B) Chitin 
C) Heparin 
D) Chondroitin 
A) Hyaluronate 
B) Chitin 
C) Heparin 
D) Chondroitin

Question 7

Glucose and other naturally occurring sugars are D sugars.

Accepted Answer

A) True 
 B)False

Question 8

Which choice properly describes the glycoside bond in the disaccharide below?

Accepted Answer

A) 1→6-α 
B) 1→6-β 
C) 1→4α 
D) 1→4β 
A) 1→6-α 
B) 1→6-β 
C) 1→4α 
D) 1→4β

Question 9

Disaccharides contain two carbonyl groups.

Accepted Answer

A) True 
 B)False

Question 10

What product forms when the compound below is treated with Benedict's reagent?

Accepted Answer

A)    
B)    
C)    
D)    
E) No reaction occurs. 
A)    
B)    
C)    
D)    
E) No reaction occurs.

Question 11

The product of the reduction of an aldose is called a/an ________,also referred to as a "sugar alcohol."

Accepted Answer

The answer of The product of the reduction of an...

Question 12

The simplest aldose is commonly called dihydroxyacetone,although its IUPAC name is 1,3-dihydroxy-2-propanone. What is the structure of this compound?

Accepted Answer

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

Question 13

Lactose is present in milk. What type of sugar is lactose?

Accepted Answer

A) A disaccharide 
B) A monosaccharide 
C) A polysaccharide 
D) A starch 
A) A disaccharide 
B) A monosaccharide 
C) A polysaccharide 
D) A starch

Question 14

Which is not a reducing sugar?

Accepted Answer

A) Glucose 
B) Fructose 
C) Sucrose 
D) Galactose 
E) An aldopentose 
A) Glucose 
B) Fructose 
C) Sucrose 
D) Galactose 
E) An aldopentose

Question 15

The monosaccharide shown below is an α anomer.

Accepted Answer

A) True 
 B)False

Question 16

Dextrose is another name for the monosaccharide ________.

Accepted Answer

The answer of Dextrose is another name for the monosaccharide...

Question 17

Which compound is the most soluble in water?

Accepted Answer

A) CH2OHCHOHCHOHCHOHCHOHCHO 
B) CH3CH2CH=CHCH2CH=CHCH2CH2CH2CH2CH2CH2CH2COOH 
C) CH3CH2CH2CH2CH2CH2CH2CH2CH3 
D) CH3CH2CH2CH2CH2CH2CH2CH2OH 
A) CH2OHCHOHCHOHCHOHCHOHCHO 
B) CH3CH2CH=CHCH2CH=CHCH2CH2CH2CH2CH2CH2CH2COOH 
C) CH3CH2CH2CH2CH2CH2CH2CH2CH3 
D) CH3CH2CH2CH2CH2CH2CH2CH2OH

Question 18

What is the structure of amylopectin?

Accepted Answer

A) Unbranched skeleton of glucose molecules joined by 1→4-α-glycoside linkages 
B) Branched skeleton of glucose molecules joined by 1→4-α-glycoside linkages 
C) Unbranched skeleton of glucose molecules joined by 1→4-β-glycoside linkages 
D) Branched skeleton of glucose molecules joined by 1→4-β-glycoside linkages 
A) Unbranched skeleton of glucose molecules joined by 1→4-α-glycoside linkages 
B) Branched skeleton of glucose molecules joined by 1→4-α-glycoside linkages 
C) Unbranched skeleton of glucose molecules joined by 1→4-β-glycoside linkages 
D) Branched skeleton of glucose molecules joined by 1→4-β-glycoside linkages

Question 19

Cellulose is a highly-branched polymer composed of repeating glucose units joined in a 1→4-β-glycosidic linkage.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following is a ketohexose?

Accepted Answer

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

Exam 20: Carbohydrates

Disaccharides and polysaccharides contain monosaccharide units joined together by which of the following?

Carbohydrates serve important energy and structural roles for both plants and animals.

Which labeled carbon atom in the structure below is the anomeric carbon?

Gentobiose,a rare disaccharide found in saffron,produces two identical monosaccharides when it undergoes hydrolysis. What is the identity of the hydrolysis product?

How many acetals and hemiacetals are present in the disaccharide below?

Which is not a glycosaminoglycan?

Glucose and other naturally occurring sugars are D sugars.

Which choice properly describes the glycoside bond in the disaccharide below?

Disaccharides contain two carbonyl groups.

What product forms when the compound below is treated with Benedict's reagent?

The product of the reduction of an aldose is called a/an ________,also referred to as a "sugar alcohol."

The simplest aldose is commonly called dihydroxyacetone,although its IUPAC name is 1,3-dihydroxy-2-propanone. What is the structure of this compound?

Lactose is present in milk. What type of sugar is lactose?

Which is not a reducing sugar?

The monosaccharide shown below is an α anomer.

Dextrose is another name for the monosaccharide ________.

Which compound is the most soluble in water?

What is the structure of amylopectin?

Cellulose is a highly-branched polymer composed of repeating glucose units joined in a 1→4-β-glycosidic linkage.

Which of the following is a ketohexose?

Matter and Measurement

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Introduction to Organic Molecules and Functional Groups

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Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen,halogen,or Sulfur

The Three-Dimensional Shape of Molecules

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