Question 1

Artificial sweeteners should be avoided by people suffering from phenylketonuria (PKU)due to their body's inability to metabolize ____ properly.

Accepted Answer

A) aldehydes 
B) phenols 
C) ketones 
D) phenylalanine 
A) aldehydes 
B) phenols 
C) ketones 
D) phenylalanine

Question 2

The structure given below has what type of glycosidic linkage?

Accepted Answer

A) "$\alpha$(1$\rightarrow$6)" 
B) "$\beta$(1$\rightarrow$4)" 
C) "$\beta$(1$\rightarrow$6)" 
D) "$\alpha$(1$\rightarrow$4)" 
A) "$\alpha$(1$\rightarrow$6)" 
B) "$\beta$(1$\rightarrow$4)" 
C) "$\beta$(1$\rightarrow$6)" 
D) "$\alpha$(1$\rightarrow$4)"

Question 3

The cyclic form of glucose results from the formation of a(n)_____ .

Accepted Answer

A) ester 
B) acetal 
C) hemiacetal 
D) amide 
A) ester 
B) acetal 
C) hemiacetal 
D) amide

Question 4

What characteristic of carbohydrates is not commonly found in the previously studied classes of compounds?

Accepted Answer

A) Carbohydrates are unique in that they do not contain any nitrogen. 
B) Carbohydrates often contain a functional group on each carbon. 
C) The carbohydrate class is the only class composed solely of cyclic compounds. 
D) There is more than one correct response. 
A) Carbohydrates are unique in that they do not contain any nitrogen. 
B) Carbohydrates often contain a functional group on each carbon. 
C) The carbohydrate class is the only class composed solely of cyclic compounds. 
D) There is more than one correct response.

Question 5

Which of the following can exist in enantiomers?

Accepted Answer

A)    
B)    
C)    
D) all of these choices 
A)    
B)    
C)    
D) all of these choices

Question 6

A sugar present in honey in a 1:1 ratio with glucose is _____ .

Accepted Answer

A) fructose 
B) maltose 
C) sucrose 
D) galactose 
A) fructose 
B) maltose 
C) sucrose 
D) galactose

Question 7

The L form of a stereoisomer has an -OH on the left in the Fischer projection.

Accepted Answer

A) True 
 B)False

Question 8

Polysaccharides tend to be very sweet.

Accepted Answer

A) True 
 B)False

Question 9

A polysaccharide containing $\beta$(1$\rightarrow$4)linkages is _____ .

Accepted Answer

A) cellulose 
B) glycogen 
C) amylose 
D) amylopectin 
A) cellulose 
B) glycogen 
C) amylose 
D) amylopectin

Question 10

Cellulose does not contribute to the caloric intake in humans.

Accepted Answer

A) True 
 B)False

Question 11

The cyclic form of glucose has how many possible stereoisomers compared to the noncyclic form?

Accepted Answer

A) double 
B) triple 
C) reduced by half 
D) remains the same 
A) double 
B) triple 
C) reduced by half 
D) remains the same

Question 12

Molecules that are mirror images are enantiomers.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following sugars fails to give a positive Benedict's test?

Accepted Answer

A) glucose 
B) galactose 
C) lactose 
D) sucrose 
A) glucose 
B) galactose 
C) lactose 
D) sucrose

Question 14

Which of the following carbohydrates yields invert sugar upon hydrolysis?

Accepted Answer

A) fructose 
B) sucrose 
C) starch 
D) glycogen 
A) fructose 
B) sucrose 
C) starch 
D) glycogen

Question 15

One function of carbohydrates is to form structural elements of some cells and tissues.

Accepted Answer

A) True 
 B)False

Question 16

Maltose upon hydrolysis yields

Accepted Answer

A) glucose and galactose. 
B) glucose and fructose. 
C) only glucose. 
D) Hydrolysis does not occur 
A) glucose and galactose. 
B) glucose and fructose. 
C) only glucose. 
D) Hydrolysis does not occur

Question 17

A characteristic of carbohydrates is that a carbonyl carbon is usually incorporated in their structures.

Accepted Answer

A) True 
 B)False

Question 18

All aldopentoses have 5 carbon atoms.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following is NOT a carbohydrate?

Accepted Answer

A) amylopectin 
B) deoxyribose 
C) glycogen 
D) cellulose 
A) amylopectin 
B) deoxyribose 
C) glycogen 
D) cellulose

Question 20

There are currently several artificial sweeteners on the market.Which of the following is NOT one of those artificial sweeteners?

Accepted Answer

A) maltose 
B) aspartame 
C) sorbitol 
D) acesulfame-K 
A) maltose 
B) aspartame 
C) sorbitol 
D) acesulfame-K

Exam 17: Carbohydrates

Artificial sweeteners should be avoided by people suffering from phenylketonuria (PKU)due to their body's inability to metabolize ____ properly.

The structure given below has what type of glycosidic linkage?

The cyclic form of glucose results from the formation of a(n)_____ .

What characteristic of carbohydrates is not commonly found in the previously studied classes of compounds?

Which of the following can exist in enantiomers?

A sugar present in honey in a 1:1 ratio with glucose is _____ .

The L form of a stereoisomer has an -OH on the left in the Fischer projection.

Polysaccharides tend to be very sweet.

A polysaccharide containing β\betaβ (1 →\rightarrow→ 4)linkages is _____ .

Cellulose does not contribute to the caloric intake in humans.

The cyclic form of glucose has how many possible stereoisomers compared to the noncyclic form?

Molecules that are mirror images are enantiomers.

Which of the following sugars fails to give a positive Benedict's test?

Which of the following carbohydrates yields invert sugar upon hydrolysis?

One function of carbohydrates is to form structural elements of some cells and tissues.

Maltose upon hydrolysis yields

A characteristic of carbohydrates is that a carbonyl carbon is usually incorporated in their structures.

All aldopentoses have 5 carbon atoms.

Which of the following is NOT a carbohydrate?

There are currently several artificial sweeteners on the market.Which of the following is NOT one of those artificial sweeteners?

Matter, measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Solutions and Colloids

Reaction Rates and Equilibrium

Acids, bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Lipids

Proteins

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

A polysaccharide containing $\beta$ (1 $\rightarrow$ 4)linkages is _____ .