Question 1

Galactose is a product of enzymatic hydrolysis of

Accepted Answer

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

Question 2

Galactosemia is the name of a metabolic disorder. In this disorder, an enzyme is missing that is needed to

Accepted Answer

A)  make galactose from lactose. 
B)  make lactose from galactose. 
C)  convert galactose to glycogen. 
D)  convert galactose to glucose. 
E)  convert α-galactose to β-galactose. 
A)  make galactose from lactose. 
B)  make lactose from galactose. 
C)  convert galactose to glycogen. 
D)  convert galactose to glucose. 
E)  convert α-galactose to β-galactose.

Question 3

Galactose is a disaccharide.

Accepted Answer

A) True 
 B)False

Question 4

The breakdown of glucose to chemical energy for the cells to do work is an example of

Accepted Answer

A)  oxidation. 
B)  respiration. 
C)  reduction. 
D)  anabolism. 
E)  mutarotation. 
A)  oxidation. 
B)  respiration. 
C)  reduction. 
D)  anabolism. 
E)  mutarotation.

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

Which Fischer projection is the mirror image of the structure given below?

Accepted Answer

A)  $\begin{array} { c } 
\mathrm { Br } \
\mathrm { | } \
\mathrm { HO } - \mathrm { CH } _ { 3 } \
 \mathrm { || }  \
\mathrm { Cl }
\end{array}$ 
B)  $ \quad $$ \quad $$\mathrm { Br }$
$ \quad $$ \quad $|
$\mathrm { Cl } - \mathrm { OH }$
$ \quad $$ \quad $|
$ \quad $$ \quad $$\mathrm { CH } _ { 3 }$ 
C)    
D)    
E)    
A)  $\begin{array} { c } 
\mathrm { Br } \
\mathrm { | } \
\mathrm { HO } - \mathrm { CH } _ { 3 } \
 \mathrm { || }  \
\mathrm { Cl }
\end{array}$ 
B)  $ \quad $$ \quad $$\mathrm { Br }$
$ \quad $$ \quad $|
$\mathrm { Cl } - \mathrm { OH }$
$ \quad $$ \quad $|
$ \quad $$ \quad $$\mathrm { CH } _ { 3 }$ 
C)    
D)    
E)

Question 7

Sucrose is a disaccharide.

Accepted Answer

A) True 
 B)False

Question 8

The iodine test is used to detect the presence of a reducing sugar.

Accepted Answer

A) True 
 B)False

Question 9

A glycosidic bond between two monosaccharides can also be classified as a(n)

Accepted Answer

A)  double bond. 
B)  ester bond. 
C)  ether bond. 
D)  achiral bond. 
E)  alcohol bond. 
A)  double bond. 
B)  ester bond. 
C)  ether bond. 
D)  achiral bond. 
E)  alcohol bond.

Question 10

Sucrose is made up of glucose units only.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is an example of an aldopentose?

Accepted Answer

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

Question 12

One difference between D-glucose and L-glucose is

Accepted Answer

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

Question 13

State whether each of these structures is the α- or β-form.
-

Accepted Answer

The answer of State whether each of these structures is...

Question 14

Galactose has the structure shown below. Which anomer is shown?

Accepted Answer

A)  the α anomer 
B)  the β anomer 
C)  the D anomer 
D)  the L anomer 
E)  none of the above 
A)  the α anomer 
B)  the β anomer 
C)  the D anomer 
D)  the L anomer 
E)  none of the above

Question 15

Under acid hydrolysis conditions, starch is converted to

Accepted Answer

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

Question 16

In the α anomer of glucose, the OH on carbon 1 is above the plane of the ring.

Accepted Answer

A) True 
 B)False

Question 17

Ribulose has the following structural formula. To what carbohydrate class does ribulose belong? CH₂OH
∣
C =O
∣
H - C - OH
∣
H - C - OH
∣
CH₂OH

Accepted Answer

A)  aldotetrose 
B)  aldopentose 
C)  ketotetrose 
D)  ketopentose 
E)  ketohexose 
A)  aldotetrose 
B)  aldopentose 
C)  ketotetrose 
D)  ketopentose 
E)  ketohexose

Question 18

In a disaccharide, two monosaccharides are joined by what kind of bond?

Accepted Answer

A)  double 
B)  anomeric 
C)  alcohol 
D)  glycosidic 
E)  rotational 
A)  double 
B)  anomeric 
C)  alcohol 
D)  glycosidic 
E)  rotational

Question 19

A reducing sugar gives a precipitate of silver metal with Benedict's reagent.

Accepted Answer

A) True 
 B)False

Question 20

Galactose has the structure shown below. It can be classified as a(n)

Accepted Answer

A)  ribose. 
B)  ketose. 
C)  disaccharide. 
D)  monosaccharide. 
E)  ketone. 
A)  ribose. 
B)  ketose. 
C)  disaccharide. 
D)  monosaccharide. 
E)  ketone.

Exam 15: Carbohydrates

Galactose is a product of enzymatic hydrolysis of

Galactosemia is the name of a metabolic disorder. In this disorder, an enzyme is missing that is needed to

Galactose is a disaccharide.

The breakdown of glucose to chemical energy for the cells to do work is an example of

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

Which Fischer projection is the mirror image of the structure given below?

Sucrose is a disaccharide.

The iodine test is used to detect the presence of a reducing sugar.

A glycosidic bond between two monosaccharides can also be classified as a(n)

Sucrose is made up of glucose units only.

Which of the following is an example of an aldopentose?

One difference between D-glucose and L-glucose is

State whether each of these structures is the α- or β-form. -

Galactose has the structure shown below. Which anomer is shown?

Under acid hydrolysis conditions, starch is converted to

In the α anomer of glucose, the OH on carbon 1 is above the plane of the ring.

Ribulose has the following structural formula. To what carbohydrate class does ribulose belong? CH₂OH ∣ C =O ∣ H - C - OH ∣ H - C - OH ∣ CH₂OH

In a disaccharide, two monosaccharides are joined by what kind of bond?

A reducing sugar gives a precipitate of silver metal with Benedict's reagent.

Galactose has the structure shown below. It can be classified as a(n)

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