Question 1

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 2

Which one of the following behaves like an acid?

Accepted Answer

A) CH3COCH3 
B) (CH3)2NH 
C) C2H5OH 
D) C2H5COOH 
A) CH3COCH3 
B) (CH3)2NH 
C) C2H5OH 
D) C2H5COOH

Question 3

"Rubbing alcohol" is the common name for

Accepted Answer

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

Question 4

The C-C=O bond angle in acetic acid,shown below,is closest to
O

CH3C-OH

Accepted Answer

A) 90°. 
B) 109.5°. 
C) 120°. 
D) 180°. 
A) 90°. 
B) 109.5°. 
C) 120°. 
D) 180°.

Question 5

When crystallized,which form of glucose predominates?

Accepted Answer

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

Question 6

The attractive force between the cylic amine bases in DNA is

Accepted Answer

A) disulfide bridges. 
B) hydrogen bonding. 
C) hydrophobic stacking. 
D) ionic interactions of salt bridges. 
A) disulfide bridges. 
B) hydrogen bonding. 
C) hydrophobic stacking. 
D) ionic interactions of salt bridges.

Question 7

What is the common name for the simplest ketone,propanone?

Accepted Answer

A) acetal 
B) acetone 
C) carbanone 
D) formalin 
A) acetal 
B) acetone 
C) carbanone 
D) formalin

Question 8

Which of the following statements is false regarding functional groups?

Accepted Answer

A) The chemical properties of the functional group dictate the chemistry of the larger molecule. 
B) Each functional group has a characteristic chemical behavior. 
C) A functional group consists of an atom or a group of atoms that is part of a larger molecule. 
D) A functional group consists of only carbon and hydrogen atoms. 
A) The chemical properties of the functional group dictate the chemistry of the larger molecule. 
B) Each functional group has a characteristic chemical behavior. 
C) A functional group consists of an atom or a group of atoms that is part of a larger molecule. 
D) A functional group consists of only carbon and hydrogen atoms.

Question 9

Which condensed structure below representing an alkane is not correct?

Accepted Answer

A) CH3CH2CH3 
B)    
C) CH3CH2CH2CH3 
D)    
A) CH3CH2CH3 
B)    
C) CH3CH2CH2CH3 
D)

Question 10

How many peptide bonds are present in the polypeptide shown below?

Accepted Answer

A) one 
B) two 
C) three 
D) four 
A) one 
B) two 
C) three 
D) four

Question 11

What class of hydrocarbons has the general formula CnH2n?

Accepted Answer

A) alkanes 
B) alkenes and cycloalkanes 
C) alkynes 
D) aromatics 
A) alkanes 
B) alkenes and cycloalkanes 
C) alkynes 
D) aromatics

Question 12

Identify the amino acid shown below.

Accepted Answer

A) Cysteine (Cys) 
B) Serine (Ser) 
C) Threonine (Thr) 
D) Tyrosine (Tyr) 
A) Cysteine (Cys) 
B) Serine (Ser) 
C) Threonine (Thr) 
D) Tyrosine (Tyr)

Question 13

Identify the amino acid shown below.

Accepted Answer

A) Methionine (Met) 
B) Phenylalanine (Phe) 
C) Proline (Pro) 
D) Tryptophan (Trp) 
A) Methionine (Met) 
B) Phenylalanine (Phe) 
C) Proline (Pro) 
D) Tryptophan (Trp)

Question 14

To which family does this organic compound belong?

Accepted Answer

A) amide 
B) amine 
C) carboxylic acid 
D) ester 
A) amide 
B) amine 
C) carboxylic acid 
D) ester

Question 15

The functional groups in the molecule below are
O O
 
HCCH2COCH3

Accepted Answer

A) alkane,aldehyde,and ester. 
B) alkane,aldehyde,ketone,and ether. 
C) alkane,carboxylic acid,and ester. 
D) alkane,ketone,and ester. 
A) alkane,aldehyde,and ester. 
B) alkane,aldehyde,ketone,and ether. 
C) alkane,carboxylic acid,and ester. 
D) alkane,ketone,and ester.

Question 16

The process of forming mRNA from DNA is called

Accepted Answer

A) metamorphosis. 
B) replication. 
C) transcription. 
D) translation. 
A) metamorphosis. 
B) replication. 
C) transcription. 
D) translation.

Question 17

The boiling point of 1-propanol should be ________ than the boiling point of methyl ethyl ether.

Accepted Answer

A) higher than 
B) lower than 
C) the same as 
D) cannot be determined 
A) higher than 
B) lower than 
C) the same as 
D) cannot be determined

Question 18

The sum of the many organic reactions that occur in the cell is called

Accepted Answer

A) anabolism. 
B) catabolism. 
C) metabolism. 
D) none of these 
A) anabolism. 
B) catabolism. 
C) metabolism. 
D) none of these

Question 19

-Which of the compounds shown above is correctly identified by the name pentane according to the IUPAC system of naming compounds?

Accepted Answer

A) all 
B) none 
C) only (2) 
D) only (3) 
A) all 
B) none 
C) only (2) 
D) only (3)

Question 20

Which name is not correct?

Accepted Answer

A) 1,1 dimethylcyclobutane 
B) 1,2-dimethylcyclobutane 
C) 1,3-dimethylcyclohexane 
D) 1,4-dimethylcyclopentane 
A) 1,1 dimethylcyclobutane 
B) 1,2-dimethylcyclobutane 
C) 1,3-dimethylcyclohexane 
D) 1,4-dimethylcyclopentane

Exam 23: Organic and Biological Chemistry

Identify the following amine base found in nucleic acids.

Which one of the following behaves like an acid?

"Rubbing alcohol" is the common name for

The C-C=O bond angle in acetic acid,shown below,is closest to O  CH3C-OH

When crystallized,which form of glucose predominates?

The attractive force between the cylic amine bases in DNA is

What is the common name for the simplest ketone,propanone?

Which of the following statements is false regarding functional groups?

Which condensed structure below representing an alkane is not correct?

How many peptide bonds are present in the polypeptide shown below?

What class of hydrocarbons has the general formula CnH2n?

Identify the amino acid shown below.

Identify the amino acid shown below.

To which family does this organic compound belong?

The functional groups in the molecule below are O O   HCCH2COCH3

The process of forming mRNA from DNA is called

The boiling point of 1-propanol should be ________ than the boiling point of methyl ethyl ether.

The sum of the many organic reactions that occur in the cell is called

-Which of the compounds shown above is correctly identified by the name pentane according to the IUPAC system of naming compounds?

Which name is not correct?

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds 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

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Filters

The C-C=O bond angle in acetic acid,shown below,is closest to O  CH₃C-OH

What class of hydrocarbons has the general formula C_nH_2n?

The functional groups in the molecule below are O O   HCCH₂COCH₃