Question 1

Which structures represent the same dibromobenzene compound?

Accepted Answer

A) I and IV 
B) II and III 
C) I,II,and III 
D) All structures are identical. 
A) I and IV 
B) II and III 
C) I,II,and III 
D) All structures are identical.

Question 2

What are the C-C-C bond angles in cyclopropane and cyclohexane?

Accepted Answer

A) 60° in both molecules 
B) 60° in cyclopropane and 109.5° in cyclohexane 
C) 60° in cyclopropane and 120° in cyclohexane 
D) 109.5° in both molecules 
A) 60° in both molecules 
B) 60° in cyclopropane and 109.5° in cyclohexane 
C) 60° in cyclopropane and 120° in cyclohexane 
D) 109.5° in both molecules

Question 3

The term "carbohydrates" refers to a large class of polyhydroxylated

Accepted Answer

A) alcohols and carboxylic acids. 
B) aldehydes and ketones. 
C) amines and amides. 
D) ethers and esters. 
A) alcohols and carboxylic acids. 
B) aldehydes and ketones. 
C) amines and amides. 
D) ethers and esters.

Question 4

In water,which form of glucose predominates?

Accepted Answer

A) cyclic α 
B) cyclic β 
C) open chain 
D) All three are equal in solution. 
A) cyclic α 
B) cyclic β 
C) open chain 
D) All three are equal in solution.

Question 5

"Glycerol" is the common name for

Accepted Answer

A) ethanol. 
B) 2-propanol. 
C) 1,2-ethanediol. 
D) 1,2,3-propanetriol. 
A) ethanol. 
B) 2-propanol. 
C) 1,2-ethanediol. 
D) 1,2,3-propanetriol.

Question 6

Identify the following amine base found in nucleic acids.

Accepted Answer

A) Adenine (
A)  
B) Cytosine (
C)  
C) Thymine (T) 
D) Uracil (U) 
A) Adenine (
A)  
B) Cytosine (
C)  
C) Thymine (T) 
D) Uracil (U)

Question 7

Keratin is found in

Accepted Answer

A) cells. 
B) bird feathers. 
C) muscles. 
D) DNA. 
A) cells. 
B) bird feathers. 
C) muscles. 
D) DNA.

Question 8

How many possible tripeptides can be made with the amino acids: tyrosine,histidine,and cysteine,each used only once?

Accepted Answer

A) 3 
B) 4 
C) 6 
D) 9 
A) 3 
B) 4 
C) 6 
D) 9

Question 9

None of the listed compounds contains a ring.Which has at least one singly-bonded carbon atom?

Accepted Answer

A) C5H12 
B) C4H6 
C) C6H12 
D) All of these 
A) C5H12 
B) C4H6 
C) C6H12 
D) All of these

Question 10

The cycloalkane represented by a heptagon is named ________ and has the molecular formula ________.

Accepted Answer

The answer of The cycloalkane represented by a heptagon is...

Question 11

Which compound is a ketone?

Accepted Answer

A) butanal 
B) propanoic acid 
C) 2-butanone 
D) butane 
A) butanal 
B) propanoic acid 
C) 2-butanone 
D) butane

Question 12

Identify the compound that contains two oxygens.

Accepted Answer

A) aldehyde 
B) alkyne 
C) amine 
D) carboxylic acid 
A) aldehyde 
B) alkyne 
C) amine 
D) carboxylic acid

Question 13

Based on the structure of its side chains,the amino acid shown below can be classified as

Accepted Answer

A) acidic. 
B) basic. 
C) neutral,non-polar. 
D) neutral,polar. 
A) acidic. 
B) basic. 
C) neutral,non-polar. 
D) neutral,polar.

Question 14

The amide bonds that form when two or more amino acids link together are called ________ bonds.

Accepted Answer

The answer of The amide bonds that form when two...

Question 15

Which of the following molecules is the most highly oxidized,in other words,the one with the most number of C-O bonds?

Accepted Answer

A) acetaldehyde 
B) ethanoic acid 
C) dimethyl ether 
D) ethylene 
A) acetaldehyde 
B) ethanoic acid 
C) dimethyl ether 
D) ethylene

Question 16

To which family does this organic compound belong?

Accepted Answer

A) alcohol 
B) aldehyde 
C) ether 
D) ketone 
A) alcohol 
B) aldehyde 
C) ether 
D) ketone

Question 17

To which family does this organic compound belong?

Accepted Answer

A) alkane 
B) alkene 
C) alkyne 
D) arene 
A) alkane 
B) alkene 
C) alkyne 
D) arene

Question 18

Identify the compound that contains a carbon-carbon double bond.

Accepted Answer

A) 2-pentyne 
B) 1-pentene 
C) methyl propanoate 
D) methanol 
A) 2-pentyne 
B) 1-pentene 
C) methyl propanoate 
D) methanol

Question 19

The one cyclic amine base that occurs in DNA but not in RNA is

Accepted Answer

A) cystine. 
B) guanine. 
C) thymine. 
D) uracil. 
A) cystine. 
B) guanine. 
C) thymine. 
D) uracil.

Question 20

How many alpha amino acids commonly make up the different proteins found in humans?

Accepted Answer

A) 6 
B) 20 
C) 22 
D) 12 
A) 6 
B) 20 
C) 22 
D) 12

Exam 23: Connections to Organic and Biological Chemistry

Which structures represent the same dibromobenzene compound?

What are the C-C-C bond angles in cyclopropane and cyclohexane?

The term "carbohydrates" refers to a large class of polyhydroxylated

In water,which form of glucose predominates?

"Glycerol" is the common name for

Identify the following amine base found in nucleic acids.

Keratin is found in

How many possible tripeptides can be made with the amino acids: tyrosine,histidine,and cysteine,each used only once?

None of the listed compounds contains a ring.Which has at least one singly-bonded carbon atom?

The cycloalkane represented by a heptagon is named ________ and has the molecular formula ________.

Which compound is a ketone?

Identify the compound that contains two oxygens.

Based on the structure of its side chains,the amino acid shown below can be classified as

The amide bonds that form when two or more amino acids link together are called ________ bonds.

Which of the following molecules is the most highly oxidized,in other words,the one with the most number of C-O bonds?

To which family does this organic compound belong?

To which family does this organic compound belong?

Identify the compound that contains a carbon-carbon double bond.

The one cyclic amine base that occurs in DNA but not in RNA is

How many alpha amino acids commonly make up the different proteins found in humans?

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Filters

The cycloalkane represented by a heptagon is named and has the molecular formula .