Question 1

Enantiomers may have different odors because they bind with chiral receptors and each enantiomer fits the chiral receptors in a different way.

Accepted Answer

A) True 
 B)False  True

Question 2

Only chiral molecules have a mirror image.

Accepted Answer

A) True 
 B)False  False

Question 3

How many chirality centers does the following molecule contain?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
A) 0 
B) 1 
C) 2 
D) 3 B

Question 4

cis-2-Hexene and trans-3-hexene are ________ isomers.

Accepted Answer

The answer of cis-2-Hexene and trans-3-hexene are ________ isomers....

Question 5

Chiral compounds rotate plane polarized light. A compound with the ability to rotate plane polarized light is referred to as being ________.

Accepted Answer

The answer of Chiral compounds rotate plane polarized light. A...

Question 6

How many chirality centers does the following molecule contain?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 8 
A) 1 
B) 2 
C) 3 
D) 8

Question 7

The alkyl bromide below contains one chirality center.

Accepted Answer

A) True 
 B)False

Question 8

Any molecule with two chirality centers is an achiral compound.

Accepted Answer

A) True 
 B)False

Question 9

Enantiomers are stereoisomers that are ________.

Accepted Answer

A) mirror images of each other that are identical 
B) not mirror images of each other 
C) nonsuperimposable mirror images of each other 
D) cis-trans isomers of each other 
A) mirror images of each other that are identical 
B) not mirror images of each other 
C) nonsuperimposable mirror images of each other 
D) cis-trans isomers of each other

Question 10

The Fischer projection formula for D-mannose,a hexose sugar,is shown below. How many chirality centers are in D-mannose?

Accepted Answer

A) 2 
B) 4 
C) 5 
D) 6 
A) 2 
B) 4 
C) 5 
D) 6

Question 11

A compound with one chirality center exists as a pair of enantiomers.

Accepted Answer

A) True 
 B)False

Question 12

How many enantiomers can a chiral stereoisomer have?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) The number of enantiomers depends on the number of chirality centers. 
A) 0 
B) 1 
C) 2 
D) The number of enantiomers depends on the number of chirality centers.

Question 13

Aspartame contains two chirality centers.

Accepted Answer

A) True 
 B)False

Question 14

Carbohydrates,lipids,proteins,and nucleic acids are all chiral biomolecules. What does the term chiral indicate about a molecule?

Accepted Answer

A) The molecule can be synthesized by the body. 
B) The molecule can be digested by the body. 
C) The molecule has a mirror image. 
D) The molecule and its mirror image are not identical. 
A) The molecule can be synthesized by the body. 
B) The molecule can be digested by the body. 
C) The molecule has a mirror image. 
D) The molecule and its mirror image are not identical.

Question 15

A carbon atom bonded to four different groups is called a/an ________.

Accepted Answer

The answer of A carbon atom bonded to four different...

Question 16

How many chirality centers are present in the compound below?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 5 
A) 0 
B) 1 
C) 2 
D) 3 
E) 5

Question 17

________ are stereoisomers that are not mirror images of each other.

Accepted Answer

The answer of ________ are stereoisomers that are not mirror...

Question 18

Which molecule is chiral?

Accepted Answer

A) 1-pentanol 
B) cyclopentanol 
C) 2-methylcyclopentanol 
D) 2-methylpentane 
E) More than one of the molecules is chiral. 
A) 1-pentanol 
B) cyclopentanol 
C) 2-methylcyclopentanol 
D) 2-methylpentane 
E) More than one of the molecules is chiral.

Question 19

In a Fischer projection,________.

Accepted Answer

A) horizontal lines represent bonds that come out of the plane on wedges,and the vertical lines represent bonds that go back on dashed lines 
B) vertical lines represent bonds that come out of the plane on wedges,and the horizontal lines represent bonds that go back on dashed lines 
C) horizontal lines represent bonds that are in the plane of the paper,and the vertical lines represent bonds that go back on dashed lines 
D) vertical lines represent bonds that are in the plane of the paper,and the horizontal lines represent bonds that go back on dashed lines 
A) horizontal lines represent bonds that come out of the plane on wedges,and the vertical lines represent bonds that go back on dashed lines 
B) vertical lines represent bonds that come out of the plane on wedges,and the horizontal lines represent bonds that go back on dashed lines 
C) horizontal lines represent bonds that are in the plane of the paper,and the vertical lines represent bonds that go back on dashed lines 
D) vertical lines represent bonds that are in the plane of the paper,and the horizontal lines represent bonds that go back on dashed lines

Question 20

How many chirality centers does the following molecule contain?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
A) 0 
B) 1 
C) 2 
D) 3

Exam 15: The Three-Dimensional Shape of Molecules

Enantiomers may have different odors because they bind with chiral receptors and each enantiomer fits the chiral receptors in a different way.

Only chiral molecules have a mirror image.

How many chirality centers does the following molecule contain?

cis-2-Hexene and trans-3-hexene are ________ isomers.

Chiral compounds rotate plane polarized light. A compound with the ability to rotate plane polarized light is referred to as being ________.

How many chirality centers does the following molecule contain?

The alkyl bromide below contains one chirality center.

Any molecule with two chirality centers is an achiral compound.

Enantiomers are stereoisomers that are ________.

The Fischer projection formula for D-mannose,a hexose sugar,is shown below. How many chirality centers are in D-mannose?

A compound with one chirality center exists as a pair of enantiomers.

How many enantiomers can a chiral stereoisomer have?

Aspartame contains two chirality centers.

Carbohydrates,lipids,proteins,and nucleic acids are all chiral biomolecules. What does the term chiral indicate about a molecule?

A carbon atom bonded to four different groups is called a/an ________.

How many chirality centers are present in the compound below?

________ are stereoisomers that are not mirror images of each other.

Which molecule is chiral?

In a Fischer projection,________.

How many chirality centers does the following molecule contain?

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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