Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

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. 
A) Structure A 
B) Structure B 
C) Structure D 
D) Structure E 
E) None of the structures is a diastereomer of structure C.

Question 4

The compound 3-methylcyclopentanol contains one chirality center.

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

A human foot is a chiral object.

Accepted Answer

A) True 
 B)False

Question 7

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 8

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. 
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.

Question 9

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

Accepted Answer

A) identical molecules 
B) enantiomers 
C) constitutional isomers 
D) diastereomers 
A) identical molecules 
B) enantiomers 
C) constitutional isomers 
D) diastereomers

Question 10

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. 
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.

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 disease 
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 disease

Question 12

The shape of a chirality center is ________.

Accepted Answer

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

Question 13

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

Question 14

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. 
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.

Question 15

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

Question 16

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 17

The molecule below is achiral.

Accepted Answer

A) True 
 B)False

Question 18

How are the Fischer projections below related?

Accepted Answer

A) Identical molecules 
B) Enantiomers 
C) Constitutional isomers 
D) Diastereomers 
A) Identical molecules 
B) Enantiomers 
C) Constitutional isomers 
D) Diastereomers

Question 19

Which is NOT another name for a chirality center?

Accepted Answer

A) Stereogenic center 
B) Chiral carbon 
C) Asymmetric carbon 
D) Tetravalent carbon 
A) Stereogenic center 
B) Chiral carbon 
C) Asymmetric carbon 
D) Tetravalent carbon

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 15: The Three-Dimensional Shape of Molecules

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

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

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

The compound 3-methylcyclopentanol contains one chirality center.

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

A human foot is a chiral object.

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

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

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

Which statement is true?

The drug L-Dopa ________.

The shape of a chirality center is ________.

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

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

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

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.

The molecule below is achiral.

How are the Fischer projections below related?

Which is NOT another name for a chirality center?

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

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Chemical Reactions

Energy Changes,reaction Rates,and Equilibrium

Gases,liquids,and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen,halogen,or Sulfur

Aldehydes and Ketones

Carboxylic Acids,esters,and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids,proteins,and Enzymes

Nucleic Acids and Protein Synthesis

Metabolism and Energy Production

Carbohydrate,lipid,and Protein Metabolism

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