Question 1

Which of the following is a monosaccharide?

Accepted Answer

A) sucrose 
B) glucose 
C) starch 
D) cellulose 
E) cellobiose 
A) sucrose 
B) glucose 
C) starch 
D) cellulose 
E) cellobiose

Question 2

Describe the structural features of an F1F1F1S1F1F1F10-amino acid.

Accepted Answer

An F1F1F1S1F1F1F10-amino acid

Question 3

Glucose and fructose undergo a(n) ________ reaction in the formation of sucrose.

Accepted Answer

A) sugarization 
B) precipitation 
C) condensation 
D) neutralization 
E) addition 
A) sugarization 
B) precipitation 
C) condensation 
D) neutralization 
E) addition

Question 4

Which of the following statements about phospholipids is not true?

Accepted Answer

A) Phospholipids play a critical role in cell membrane structure. 
B) The fatty acid portion of a phospholipid constitutes the hydrophilic portion of the molecule. 
C) Phospholipids are composed of a glycerol molecule attached to a phosphate group and two fatty acid chains. 
D) A membrane can be formed by alignment of fatty acid chains between two phospholipid layers. 
E) The hydrophilic portion of phospholipids align with the polar interior and exterior of a cell. 
A) Phospholipids play a critical role in cell membrane structure. 
B) The fatty acid portion of a phospholipid constitutes the hydrophilic portion of the molecule. 
C) Phospholipids are composed of a glycerol molecule attached to a phosphate group and two fatty acid chains. 
D) A membrane can be formed by alignment of fatty acid chains between two phospholipid layers. 
E) The hydrophilic portion of phospholipids align with the polar interior and exterior of a cell.

Question 5

Which structure contains the ether functional group?

Accepted Answer

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

Question 6

Consider the 1,2-dichloro derivative of ethylene, in which one of the hydrogen atoms on each of the carbon atoms in ethylene is substituted with a chlorine atom, giving the structural formula CHClCHCl. Does this molecule have geometrical isomers? Remember that ethylene does not.

Accepted Answer

A) Yes, because the chlorines can be placed on the same or opposite sides of the double bond. 
B) Yes, because the chlorines can be placed on either one or both of the carbons. 
C) No, because both the formula and bonds are the same in all skeletal structures. 
D) No, because the two structures can interconvert through bond rotation. 
E) No, because there are less than four atoms bound to each carbon. 
A) Yes, because the chlorines can be placed on the same or opposite sides of the double bond. 
B) Yes, because the chlorines can be placed on either one or both of the carbons. 
C) No, because both the formula and bonds are the same in all skeletal structures. 
D) No, because the two structures can interconvert through bond rotation. 
E) No, because there are less than four atoms bound to each carbon.

Question 7

What are the similarities and differences between structural (constitutional) isomers, geometric (stereo) isomers, and optical isomers?

Accepted Answer

The molecules that comprise structural,

Question 8

The F1F1F1S1F1F1F10-helix and F1F1F1S1F1F1F10-pleated sheet are examples of ________

Accepted Answer

A) primary structure. 
B) secondary structure. 
C) tertiary structure. 
D) arrangement structure. 
E) quaternary structure. 
A) primary structure. 
B) secondary structure. 
C) tertiary structure. 
D) arrangement structure. 
E) quaternary structure.

Question 9

Draw the structure of a phospholipid and identify the hydrophilic and hydrophobic portions of the molecule.

Accepted Answer

The answer of Draw the structure of a phospholipid and...

Question 10

Which one of the following is best associated with carbohydrates?

Accepted Answer

A) amino acids 
B) saccharides 
C) hydrocarbon chains 
D) phosphate linkages 
E) hydrocarbon rings 
A) amino acids 
B) saccharides 
C) hydrocarbon chains 
D) phosphate linkages 
E) hydrocarbon rings

Question 11

Draw and name all of the isomers for C 4 H 8.

Accepted Answer

@#IMG-DLM& 1-butene; 2-butene

Question 12

The molecule drawn below is an example of ________

Accepted Answer

A) a nucleic acid base. 
B) an amino acid. 
C) a disaccharide. 
D) a fatty acid. 
E) a lipid. 
A) a nucleic acid base. 
B) an amino acid. 
C) a disaccharide. 
D) a fatty acid. 
E) a lipid.

Question 13

Which structure contains the aldehyde functional group?

Accepted Answer

A)    
B)    
C)    
D)    
E) All of the above illustrate the aldehyde functional group. 
A)    
B)    
C)    
D)    
E) All of the above illustrate the aldehyde functional group.

Question 14

The three-nucleotide sequence that codes for a specific amino acid is called a(n) ________

Accepted Answer

A) transcription factor. 
B) codon. 
C) tRNA. 
D) translation factor. 
E) base pair. 
A) transcription factor. 
B) codon. 
C) tRNA. 
D) translation factor. 
E) base pair.

Question 15

Amino acids bond together via ________ bonds.

Accepted Answer

A) ionic 
B) coordinate covalent 
C) hydrogen 
D) peptide 
E) van der Waals 
A) ionic 
B) coordinate covalent 
C) hydrogen 
D) peptide 
E) van der Waals

Question 16

What is the dominant intermolecular force that holds the double helix of DNA together?

Accepted Answer

The answer of What is the dominant intermolecular force that...

Question 17

Which of the noted functional group(s) is/are found in the following molecule?

Accepted Answer

A) only an amide 
B) only an ether 
C) both a ketone and an ether 
D) contains an amine, ether, and a ketone 
E) both an ether and an amide 
A) only an amide 
B) only an ether 
C) both a ketone and an ether 
D) contains an amine, ether, and a ketone 
E) both an ether and an amide

Question 18

Which statement is not correct? Starch and cellulose ________

Accepted Answer

A) are polysaccharides. 
B) have monosaccharides joined by glycosidic bonds. 
C) are equally easily hydrolyzed to produce glucose. 
D) are stereoisomers made from glucose monomers. 
E) are a major source of biomass. 
A) are polysaccharides. 
B) have monosaccharides joined by glycosidic bonds. 
C) are equally easily hydrolyzed to produce glucose. 
D) are stereoisomers made from glucose monomers. 
E) are a major source of biomass.

Question 19

Hydrolysis is ________

Accepted Answer

A) any reaction involving hydrogen. 
B) breaking a bond by the addition of water. 
C) the process of dissolving a solute to make a solution. 
D) breaking a bond to produce hydrogen gas. 
E) forming a bond by adding hydrogen gas. 
A) any reaction involving hydrogen. 
B) breaking a bond by the addition of water. 
C) the process of dissolving a solute to make a solution. 
D) breaking a bond to produce hydrogen gas. 
E) forming a bond by adding hydrogen gas.

Question 20

The following reaction produces a peptide. Which statement about this reaction is not correct?

Accepted Answer

A) The peptide shown is the only product produced by this reaction. 
B) This condensation reaction produces a peptide bond. 
C) An amide group is formed in this reaction. 
D) An amino group reacts with a carboxylic acid group. 
E) Two amino acids are linked together by this reaction. 
A) The peptide shown is the only product produced by this reaction. 
B) This condensation reaction produces a peptide bond. 
C) An amide group is formed in this reaction. 
D) An amino group reacts with a carboxylic acid group. 
E) Two amino acids are linked together by this reaction.

Exam 20: Organic and Biological Molecules: the Compounds of Life

Which of the following is a monosaccharide?

Describe the structural features of an -amino acid.

Glucose and fructose undergo a(n) ________ reaction in the formation of sucrose.

Which of the following statements about phospholipids is not true?

Which structure contains the ether functional group?

Consider the 1,2-dichloro derivative of ethylene, in which one of the hydrogen atoms on each of the carbon atoms in ethylene is substituted with a chlorine atom, giving the structural formula CHClCHCl. Does this molecule have geometrical isomers? Remember that ethylene does not.

What are the similarities and differences between structural (constitutional) isomers, geometric (stereo) isomers, and optical isomers?

The -helix and -pleated sheet are examples of ________

Draw the structure of a phospholipid and identify the hydrophilic and hydrophobic portions of the molecule.

Which one of the following is best associated with carbohydrates?

Draw and name all of the isomers for C 4 H 8.

The molecule drawn below is an example of ________

Which structure contains the aldehyde functional group?

The three-nucleotide sequence that codes for a specific amino acid is called a(n) ________

Amino acids bond together via ________ bonds.

What is the dominant intermolecular force that holds the double helix of DNA together?

Which of the noted functional group(s) is/are found in the following molecule?

Which statement is not correct? Starch and cellulose ________

Hydrolysis is ________

The following reaction produces a peptide. Which statement about this reaction is not correct?

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: The Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Solids: Crystals, Alloys, and Polymers

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

Filters

Draw and name all of the isomers for C ₄ H ₈.