Question 1

Which statement is true?

Accepted Answer

A)  A carbon that is part of a multiple bond is always a chirality center.
B)  The carbon atom in a CH2 group is a chirality center only when it is part of a ring.
C)  Stereoisomers always have the same functional groups.
D)  Diastereomers are mirror image isomers that are not superimposable.E) A) and B)
F) A) and C)

Question 2

Ethambutol (structure shown)is a bacteriostatic antimycobacterial drug prescribed to treat tuberculosis (Mycobacterium tuberculosis). There are ________ chirality centers in ethambutol.

Accepted Answer

The answer of Ethambutol (structure shown)is a bacteriostatic antimycobacterial drug...

Question 3

Which choice is not one of the properties that are identical for two enantiomers of the same compound?

Accepted Answer

A)  Melting point
B)  Interaction with plane-polarized light
C)  Boiling point
D)  Solubility
E)  None of the choices are correct.F) B) and E)
G) None of the above

Question 4

How are the Fischer projections below related?

Accepted Answer

A)  Identical molecules
B)  Enantiomers
C)  Constitutional isomers
D)  DiastereomersE) A) and B)
F) B) and D)

Question 5

Which,if any,of the labeled carbon atoms in the compound below is a chirality center?

Accepted Answer

A)  C1 is the only chirality center.
B)  C2 is the only chirality center.
C)  Both C1 and C2 are chirality centers.
D)  Neither C1 nor C2 are chirality centers.E) A) and B)
F) A) and C)

Question 6

Consider the stereoisomers (A-E) drawn below:  Structures C and D are ________.

Accepted Answer

A)  identical molecules
B)  enantiomers
C)  constitutional isomers
D)  diastereomersE) All of the above
F) A) and B)

Question 7

A human foot is a chiral object.

Accepted Answer

A) True 
 B)False

Question 8

A sample tube containing equal amounts of two enantiomers would be optically inactive.

Accepted Answer

A) True 
 B)False

Question 9

The specific rotation of pure cholesterol was measured to be -32. Based on this information,which statement concerning cholesterol is NOT true?

Accepted Answer

A)  Cholesterol is a chiral compound.
B)  Cholesterol is optically inactive.
C)  Cholesterol is levorotatory.
D)  Cholesterol rotates plane polarized light in a counterclockwise direction.E) B) and C)
F) None of the above

Question 10

Recent rulings by the Food and Drug Administration have encouraged the development of so-called racemic switches,the patenting and marketing of a single enantiomer that was originally sold as a racemic mixture.

Accepted Answer

A) True 
 B)False

Question 11

The drug L-Dopa ________.

Accepted Answer

A)  is marketed as a racemic mixture for the treatment of Parkinson's disease
B)  was first isolated from the leaves of the broad bean Vicia faba
C)  is a chiral molecule with two chirality centers
D)  has only one enantiomer that is active against Parkinson's diseaseE) A) and D)
F) B) and C)

Question 12

The molecule below is achiral.

Accepted Answer

A) True 
 B)False

Question 13

cis-2-Butene and trans-2-butene are stereoisomers related as diastereomers.

Accepted Answer

A) True 
 B)False

Question 14

Consider the stereoisomers (A-E) drawn below:  Which structure is an enantiomer of structure A?

Accepted Answer

A)  Structure B
B)  Structure C
C)  Structure D
D)  Structure EE) None of the above
F) B) and D)

Question 15

Consider the stereoisomers (A-E) drawn below:  Which structure(s) is/are a diastereomer of structure C?

Accepted Answer

A)  Structure A
B)  Structure B
C)  Structure D
D)  Structure E
E)  None of the structures is a diastereomer of structure C.F) B) and D)
G) All of the above

Question 16

The compound 3-methylcyclopentanol contains one chirality center.

Accepted Answer

A) True 
 B)False

Question 17

There are six chirality centers in the simple sugar D-glucose,shown below.

Accepted Answer

A) True 
 B)False

Question 18

Which is NOT another name for a chirality center?

Accepted Answer

A)  Stereogenic center
B)  Chiral carbon
C)  Asymmetric carbon
D)  Tetravalent carbonE) B) and C)
F) None of the above

Question 19

The compound 4-methyl-2-hexene is not a chiral molecule.

Accepted Answer

A) True 
 B)False

Question 20

The shape of a chirality center is ________.

Accepted Answer

The answer of The shape of a chirality center is...

Exam 15: The Three-Dimensional Shape of Molecules

Which,if any,of the labeled carbon atoms in the compound below is a chirality center?

Correct AnswerverifiedShow Answer

A human foot is a chiral object.

Correct AnswerverifiedShow Answer

The shape of a chirality center is ________.

Correct AnswerverifiedShow Answer

Ethambutol (structure shown)is a bacteriostatic antimycobacterial drug prescribed to treat tuberculosis (Mycobacterium tuberculosis). There are ________ chirality centers in ethambutol.

Correct AnswerverifiedShow Answer

cis-2-Butene and trans-2-butene are stereoisomers related as diastereomers.

Correct AnswerverifiedShow Answer

Consider the stereoisomers (A-E) drawn below: Which structure is an enantiomer of structure A?

Correct AnswerverifiedShow Answer

The compound 4-methyl-2-hexene is not a chiral molecule.

Correct AnswerverifiedShow Answer

A sample tube containing equal amounts of two enantiomers would be optically inactive.

Correct AnswerverifiedShow Answer

Consider the stereoisomers (A-E) drawn below: Which structure(s) is/are a diastereomer of structure C?

Correct AnswerverifiedShow Answer

The drug L-Dopa ________.

Correct AnswerverifiedShow Answer

Which is NOT another name for a chirality center?

Correct AnswerverifiedShow Answer

Consider the stereoisomers (A-E) drawn below: Structures C and D are ________.

Correct AnswerverifiedShow Answer

The molecule below is achiral.

Correct AnswerverifiedShow Answer

The compound 3-methylcyclopentanol contains one chirality center.

Correct AnswerverifiedShow Answer

The specific rotation of pure cholesterol was measured to be -32. Based on this information,which statement concerning cholesterol is NOT true?

Correct AnswerverifiedShow Answer

How are the Fischer projections below related?

Correct AnswerverifiedShow Answer

Recent rulings by the Food and Drug Administration have encouraged the development of so-called racemic switches,the patenting and marketing of a single enantiomer that was originally sold as a racemic mixture.

Correct AnswerverifiedShow Answer

Which statement is true?

Correct AnswerverifiedShow Answer

Which choice is not one of the properties that are identical for two enantiomers of the same compound?

Correct AnswerverifiedShow Answer

There are six chirality centers in the simple sugar D-glucose,shown below.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified