Question 1

Galactose is one of the products of enzymatic hydrolysis of

Accepted Answer

A) sucrose. 
B) lactose. 
C) glucose. 
D) maltose. 
E) erythrose. 
A) sucrose. 
B) lactose. 
C) glucose. 
D) maltose. 
E) erythrose.

Question 2

Which group of carbohydrates cannot be hydrolyzed to give smaller molecules?

Accepted Answer

A) oligosaccharides 
B) trisaccharides 
C) disaccharides 
D) monosaccharides 
E) polysaccharides 
A) oligosaccharides 
B) trisaccharides 
C) disaccharides 
D) monosaccharides 
E) polysaccharides

Question 3

Which molecule below has stereoisomers with different biological effects?

Accepted Answer

A) carvone 
B) naproxen 
C) epinephrine 
D) nicotine 
E) All of the above. 
A) carvone 
B) naproxen 
C) epinephrine 
D) nicotine 
E) All of the above.

Question 4

Which of the following is an example of an aldohexose?

Accepted Answer

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

Question 5

Identify each Fischer projection as the D- or L-isomer.
-

Accepted Answer

The answer of Identify each Fischer projection as the D-...

Question 6

Amylose is a polysaccharide which has

Accepted Answer

A)  only   bonds glucose units. 
B)  hemiacetal links joining glucose units. 
C)  carbon-carbon bonds joining glucose units. 
D)  both   bonds between glucose units. 
E)  only   bonds between glucose units. 
A)  only   bonds glucose units. 
B)  hemiacetal links joining glucose units. 
C)  carbon-carbon bonds joining glucose units. 
D)  both   bonds between glucose units. 
E)  only   bonds between glucose units.

Question 7

Chiral drugs consist of only one enantiomer. The benefits of using a pure enantiomer, rather than a mixture, include

Accepted Answer

A) reduced chances of drug interactions. 
B) elimination of side effects. 
C) higher potency (lower total dose of drug). 
D) All of the above. 
E) None of the above. 
A) reduced chances of drug interactions. 
B) elimination of side effects. 
C) higher potency (lower total dose of drug). 
D) All of the above. 
E) None of the above.

Question 8

A carbohydrate that gives two molecules when it is completely hydrolyzed is known as a

Accepted Answer

A) polysaccharide. 
B) monosaccharide. 
C) starch. 
D) trisaccharide. 
E) disaccharide. 
A) polysaccharide. 
B) monosaccharide. 
C) starch. 
D) trisaccharide. 
E) disaccharide.

Question 9

Photosynthesis uses ________ as an energy source.

Accepted Answer

A) sunlight 
B) glucose 
C) oxygen 
D) carbon dioxide 
E) chlorophyll 
A) sunlight 
B) glucose 
C) oxygen 
D) carbon dioxide 
E) chlorophyll

Question 10

Refer to the disaccharides below to answer the question(s)that follow.  
-Hydrolysis of the disaccharide above gives the monosaccharides

Accepted Answer

A) ribose and glucose. 
B) fructose and lactose. 
C) fructose and ribose. 
D) fructose and glucose. 
E) ribose and galactose. 
A) ribose and glucose. 
B) fructose and lactose. 
C) fructose and ribose. 
D) fructose and glucose. 
E) ribose and galactose.

Question 11

Under acid hydrolysis conditions, starch is ultimately converted to

Accepted Answer

A) fructose. 
B) galactose. 
C) xylose. 
D) maltose. 
E) glucose. 
A) fructose. 
B) galactose. 
C) xylose. 
D) maltose. 
E) glucose.

Question 12

Which sugar is NOT a reducing sugar?

Accepted Answer

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

Question 13

Which of the following is an example of a ketopentose?

Accepted Answer

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

Question 14

One difference between D-glucose and L-glucose is

Accepted Answer

A) L-glucose cannot form a closed structure. 
B) L-glucose has a 5-membered ring, and D-glucose has a 6-membered ring. 
C) the open-chain form of L-glucose does not exist. 
D) it is not possible to make L-glucose. 
E) only D-glucose is more commonly found in disaccharides and polysaccharides. 
A) L-glucose cannot form a closed structure. 
B) L-glucose has a 5-membered ring, and D-glucose has a 6-membered ring. 
C) the open-chain form of L-glucose does not exist. 
D) it is not possible to make L-glucose. 
E) only D-glucose is more commonly found in disaccharides and polysaccharides.

Question 15

The sugar also known as dextrose and blood sugar is

Accepted Answer

A) lactose. 
B) sucrose. 
C) glucose. 
D) galactose. 
E) fructose. 
A) lactose. 
B) sucrose. 
C) glucose. 
D) galactose. 
E) fructose.

Question 16

Fructose does not undergo hydrolysis because it is a(n)

Accepted Answer

A) aldose. 
B) disaccharide. 
C) hexose. 
D) monosaccharide. 
E) reducing sugar. 
A) aldose. 
B) disaccharide. 
C) hexose. 
D) monosaccharide. 
E) reducing sugar.

Question 17

Hypoglycemia is a condition in which

Accepted Answer

A) the glucose level in the blood is higher than normal. 
B) the amount of glucose in the urine is higher than normal. 
C) the glucose level in the pancreas is higher than normal. 
D) the glucose level in the blood is lower than normal. 
E) the glucose level in the blood is about 100 mg/dL. 
A) the glucose level in the blood is higher than normal. 
B) the amount of glucose in the urine is higher than normal. 
C) the glucose level in the pancreas is higher than normal. 
D) the glucose level in the blood is lower than normal. 
E) the glucose level in the blood is about 100 mg/dL.

Question 18

In the L- isomer of a Fischer projection of a monosaccharide, the -OH group furthest from the carbonyl is written

Accepted Answer

A) on the left of the bottom chiral carbon. 
B) on the right of the top chiral carbon. 
C) on the left of the middle chiral carbon. 
D) on the right of the bottom chiral carbon. 
E) on the left of the top chiral carbon. 
A) on the left of the bottom chiral carbon. 
B) on the right of the top chiral carbon. 
C) on the left of the middle chiral carbon. 
D) on the right of the bottom chiral carbon. 
E) on the left of the top chiral carbon.

Question 19

The reduction of monosaccharides produces

Accepted Answer

A) disaccharides. 
B) sugar acids. 
C) polysaccharides. 
D) trisaccharides. 
E) sugar alcohols. 
A) disaccharides. 
B) sugar acids. 
C) polysaccharides. 
D) trisaccharides. 
E) sugar alcohols.

Question 20

A monosaccharide that contains 4 carbon atoms, one of which is in an aldehyde group, is classified as a(n)

Accepted Answer

A) aldopentose. 
B) aldohexose. 
C) aldotetrose. 
D) ketopentose. 
E) ketotetrose. 
A) aldopentose. 
B) aldohexose. 
C) aldotetrose. 
D) ketopentose. 
E) ketotetrose.

Exam 15: Carbohydrates

Galactose is one of the products of enzymatic hydrolysis of

Which group of carbohydrates cannot be hydrolyzed to give smaller molecules?

Which molecule below has stereoisomers with different biological effects?

Which of the following is an example of an aldohexose?

Identify each Fischer projection as the D- or L-isomer. -

Amylose is a polysaccharide which has

Chiral drugs consist of only one enantiomer. The benefits of using a pure enantiomer, rather than a mixture, include

A carbohydrate that gives two molecules when it is completely hydrolyzed is known as a

Photosynthesis uses ________ as an energy source.

Refer to the disaccharides below to answer the question(s)that follow. -Hydrolysis of the disaccharide above gives the monosaccharides

Under acid hydrolysis conditions, starch is ultimately converted to

Which sugar is NOT a reducing sugar?

Which of the following is an example of a ketopentose?

One difference between D-glucose and L-glucose is

The sugar also known as dextrose and blood sugar is

Fructose does not undergo hydrolysis because it is a(n)

Hypoglycemia is a condition in which

In the L- isomer of a Fischer projection of a monosaccharide, the -OH group furthest from the carbonyl is written

The reduction of monosaccharides produces

A monosaccharide that contains 4 carbon atoms, one of which is in an aldehyde group, is classified as a(n)

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