Question 1

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 2

An enantiomer is ________.

Accepted Answer

A)  a stereoisomer that is not a mirror image of another molecule
B)  a stereoisomer whose mirror image cannot be superimposed
C)  a diastereoisomer
D)  a constitutional isomer
E)  a geometric isomer

Question 3

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

Accepted Answer

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

Question 4

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

Accepted Answer

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

Question 5

Humans do not have the enzyme necessary to hydrolyze cellulose.

Accepted Answer

A) True 
 B)False  True

Question 6

Stereoisomers that are nonsuperimposable mirror images of each other are known as ________.

Accepted Answer

A)  enantiomers
B)  achiral isomers
C)  superimposable isomers
D)  anomers
E)  Fischer projections

Question 7

The form of glucose is the ________ isomer.

Accepted Answer

A)  alpha
B)  beta
C)  delta
D)  second
E)  keto

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

Aspartame® and Saccharin® are two examples of ________.

Accepted Answer

A)  disaccharides
B)  polysaccharides
C)  chlorosaccharides
D)  alcohol sweeteners
E)  noncarbohydrate sweeteners

Question 11

Under acid hydrolysis conditions,starch is converted to ________.

Accepted Answer

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

Question 12

Amylose is a form of starch which has ________.

Accepted Answer

A)  only β-1,4-bonds between glucose units
B)  only α-1,4-links bonds glucose units
C)  both α-1,4-and β-1,4-bonds between glucose units
D)  hemiacetal links joining glucose units
E)  carbon-carbon bonds joining glucose units

Question 13

Enantiomers may have very different tastes or smells.

Accepted Answer

A) True 
 B)False

Question 14

Benedict's test requires an aldehyde and an adjacent ________.

Accepted Answer

A)  saturated carbon
B)  ketone
C)  hydroxyl
D)  phenyl ring
E)  acid

Question 15

Enantiomers are mirror images of each other.

Accepted Answer

A) True 
 B)False

Question 16

The disaccharide above contains a(n) ________-glycosidic linkage.

Accepted Answer

A)  α-1,4
B)  β-1,4
C)  α-2,4
D)  β-2,4
E)  α-2,6

Question 17

Hyperglycemia is a condition in which ________.

Accepted Answer

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

Question 18

In beta-glucose,the new -OH group is above the plane of the ring.

Accepted Answer

A) True 
 B)False

Question 19

Sucrose is made up of glucose units only.

Accepted Answer

A) True 
 B)False

Question 20

In glucose,the -OH group on carbon 4 is above the plane of the ring.

Accepted Answer

A) True 
 B)False

Exam 13: Carbohydrates

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

Correct AnswerverifiedShow Answer

An enantiomer is ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedD

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

Correct AnswerverifiedShow Answer

Humans do not have the enzyme necessary to hydrolyze cellulose.

Correct AnswerverifiedTrue

Stereoisomers that are nonsuperimposable mirror images of each other are known as ________.

Correct AnswerverifiedShow Answer

The form of glucose is the ________ isomer.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Aspartame® and Saccharin® are two examples of ________.

Correct AnswerverifiedShow Answer

Under acid hydrolysis conditions,starch is converted to ________.

Correct AnswerverifiedShow Answer

Amylose is a form of starch which has ________.

Correct AnswerverifiedShow Answer

Enantiomers may have very different tastes or smells.

Correct AnswerverifiedShow Answer

Benedict's test requires an aldehyde and an adjacent ________.

Correct AnswerverifiedShow Answer

Enantiomers are mirror images of each other.

Correct AnswerverifiedShow Answer

The disaccharide above contains a(n) ________-glycosidic linkage.

Correct AnswerverifiedShow Answer

Hyperglycemia is a condition in which ________.

Correct AnswerverifiedC

In beta-glucose,the new -OH group is above the plane of the ring.

Correct AnswerverifiedShow Answer

Sucrose is made up of glucose units only.

Correct AnswerverifiedShow Answer

In glucose,the -OH group on carbon 4 is above the plane of the ring.

Correct AnswerverifiedShow Answer

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D

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True

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C

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