Question 1

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

Accepted Answer

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

Question 2

Which molecule below has stereoisomers with different biological effects?

Accepted Answer

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

Question 3

Which sugar is NOT a reducing sugar?

Accepted Answer

A)  glucose
B)  galactose
C)  sucrose
D)  fructose
E)  maltoseF) None of the above
G) A) and C)

Question 4

Photosynthesis uses ________ as an energy source.

Accepted Answer

A)  sunlight
B)  glucose
C)  oxygen
D)  carbon dioxide
E)  chlorophyllF) C) and D)
G) A) and C)

Question 5

Which of the following is an example of an aldohexose?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) None of the above
G) A) and D)

Question 6

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.F) A) and B)
G) C) and E)

Question 7

The reduction of monosaccharides produces

Accepted Answer

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

Question 8

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.F) All of the above
G) C) and D)

Question 9

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.F) A) and B)
G) A) and D)

Question 10

Galactose is one of the products of enzymatic hydrolysis of

Accepted Answer

A)  sucrose.
B)  lactose.
C)  glucose.
D)  maltose.
E)  erythrose.F) All of the above
G) C) and E)

Question 11

Which of the following is an example of a ketopentose?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) C) and E)
G) A) and E)

Question 12

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

Accepted Answer

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

Question 13

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

Accepted Answer

A)  oligosaccharides
B)  trisaccharides
C)  disaccharides
D)  monosaccharides
E)  polysaccharidesF) All of the above
G) A) and B)

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.F) B) and E)
G) A) and E)

Question 15

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.F) C) and E)
G) A) and B)

Question 16

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.F) None of the above
G) A) and B)

Question 17

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.F) A) and B)
G) A) and C)

Question 18

Under acid hydrolysis conditions, starch is ultimately converted to

Accepted Answer

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

Question 19

The sugar also known as dextrose and blood sugar is

Accepted Answer

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

Question 20

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.F) All of the above
G) B) and E)

Exam 15: Carbohydrates

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

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One difference between D-glucose and L-glucose is

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Which sugar is NOT a reducing sugar?

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

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Photosynthesis uses ________ as an energy source.

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

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Hypoglycemia is a condition in which

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Galactose is one of the products of enzymatic hydrolysis of

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

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

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Which of the following is an example of an aldohexose?

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Under acid hydrolysis conditions, starch is ultimately converted to

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Which molecule below has stereoisomers with different biological effects?

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The reduction of monosaccharides produces

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Amylose is a polysaccharide which has

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Which of the following is an example of a ketopentose?

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

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

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

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The sugar also known as dextrose and blood sugar is

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