Question 1

Glycogen consists of beta-glucose monomers.
__________________

Accepted Answer

A) True 
 B)False

Question 2

Figure 3-3
Use the figure to answer the corresponding question(s).  
-The type of connection between the atoms at the point labeled 1 in Figure 3-3 is:

Accepted Answer

A)  a peptide bond. 
B)  a glycoside linkage. 
C)  a disulfide bond. 
D)  a phosphodiester linkage. 
E)  a hydrogen bond. 
A)  a peptide bond. 
B)  a glycoside linkage. 
C)  a disulfide bond. 
D)  a phosphodiester linkage. 
E)  a hydrogen bond.

Question 3

If the differently shaded portions of this molecule represent different polypeptide chains, then this figure is representative of:

Accepted Answer

A)  an amino acid. 
B)  the quaternary structure of a protein. 
C)  a steroid hormone. 
D)  cellulose. 
E)  a carotenoid. 
A)  an amino acid. 
B)  the quaternary structure of a protein. 
C)  a steroid hormone. 
D)  cellulose. 
E)  a carotenoid.

Question 4

What macromolecule is composed entirely of beta-glucose units?

Accepted Answer

A)  starch 
B)  chitin 
C)  glycogen 
D)  cellulose 
E)  protein 
A)  starch 
B)  chitin 
C)  glycogen 
D)  cellulose 
E)  protein

Question 5

Which pair matches the correct macromolecule with the bond that joins its subunits?

Accepted Answer

A)  polysaccharide-peptide bond 
B)  triacylglycerol-glycosidic linkage 
C)  nucleic acid-phosphodiester linkage 
D)  protein-ester linkage 
E)  steroid-peptide bond 
A)  polysaccharide-peptide bond 
B)  triacylglycerol-glycosidic linkage 
C)  nucleic acid-phosphodiester linkage 
D)  protein-ester linkage 
E)  steroid-peptide bond

Question 6

The two molecules in the following figure represent:

Accepted Answer

A)  ionized structures. 
B)  enantiomers. 
C)  secondary structures. 
D)  geometric isomers. 
E)  polymers. 
A)  ionized structures. 
B)  enantiomers. 
C)  secondary structures. 
D)  geometric isomers. 
E)  polymers.

Question 7

An amphipathic molecule has:

Accepted Answer

A)  two polar ends. 
B)  two hydrophobic ends. 
C)  a hydrophobic and a hydrophilic portion. 
D)  only one hydrophobic end. 
E)  only one hydrophilic end. 
A)  two polar ends. 
B)  two hydrophobic ends. 
C)  a hydrophobic and a hydrophilic portion. 
D)  only one hydrophobic end. 
E)  only one hydrophilic end.

Question 8

A beta-pleated sheet is an example of a protein's tertiary structure.
__________________

Accepted Answer

A) True 
 B)False

Question 9

A single protein may have several domains.
__________________

Accepted Answer

A) True 
 B)False

Question 10

Which of the following statements concerning steroids is FALSE?

Accepted Answer

A)  They can function as hormones. 
B)  They are exemplified by cholesterol. 
C)  They consist of four attached carbon rings. 
D)  They are synthesized from isoprene units. 
E)  They contain phosphodiester linkages. 
A)  They can function as hormones. 
B)  They are exemplified by cholesterol. 
C)  They consist of four attached carbon rings. 
D)  They are synthesized from isoprene units. 
E)  They contain phosphodiester linkages.

Question 11

A disaccharide is composed of two monosaccharides joined by a glycosidic linkage.
__________________

Accepted Answer

A) True 
 B)False

Question 12

ATP is important in living organisms because:

Accepted Answer

A)  like all other nucleic acids, it stores hereditary information. 
B)  like RNA, it acts as a source code for the formation of proteins. 
C)  it can transfer some of its energy to other chemicals. 
D)  it is an important structural component of cell membranes. 
E)  it is easily converted to starch for long-term storage. 
A)  like all other nucleic acids, it stores hereditary information. 
B)  like RNA, it acts as a source code for the formation of proteins. 
C)  it can transfer some of its energy to other chemicals. 
D)  it is an important structural component of cell membranes. 
E)  it is easily converted to starch for long-term storage.

Question 13

Figure 3-2
Use the figure below to answer the corresponding question(s).  
-Hydrophobic interactions would occur between the R groups of which two amino acids in Figure 3-2?

Accepted Answer

A)  1 and 4 
B)  2 and 5 
C)  3 and 6 
D)  2 and 4 
E)  3 and 5 
A)  1 and 4 
B)  2 and 5 
C)  3 and 6 
D)  2 and 4 
E)  3 and 5

Question 14

Figure 3-2
Use the figure below to answer the corresponding question(s).  
-The tertiary structure of proteins is typified by the:

Accepted Answer

A)  association of several polypeptide chains by weak bonds. 
B)  order in which amino acids are joined in a peptide chain. 
C)  bonding of two amino acids to form a dipeptide. 
D)  folding of a peptide chain to form an alpha helix. 
E)  three-dimensional shape of an individual polypeptide chain. 
A)  association of several polypeptide chains by weak bonds. 
B)  order in which amino acids are joined in a peptide chain. 
C)  bonding of two amino acids to form a dipeptide. 
D)  folding of a peptide chain to form an alpha helix. 
E)  three-dimensional shape of an individual polypeptide chain.

Question 15

MATCHING
Match the molecule with the appropriate word or phrase.
a.carbohydrate
c.nucleic acid
b.lipid
d.protein
-contains purines and pyrimidines

Accepted Answer

The answer of MATCHING
Match the molecule with the appropriate word...

Question 16

MATCHING
Match the molecule with the appropriate word or phrase.
a.carbohydrate
c.nucleic acid
b.lipid
d.protein
-starch

Accepted Answer

The answer of MATCHING
Match the molecule with the appropriate word...

Question 17

A chemical reaction in which polymers are synthesized from their building blocks is called:

Accepted Answer

A)  hydrolysis. 
B)  condensation. 
C)  oxidation. 
D)  reduction. 
E)  dissociation. 
A)  hydrolysis. 
B)  condensation. 
C)  oxidation. 
D)  reduction. 
E)  dissociation.

Question 18

Which of the following statements is true of proteins?

Accepted Answer

A)  Proteins lose some or all of their normal activity if their three-dimensional structure is disrupted. 
B)  Proteins are composed of ribose, phosphate, and a nitrogen-containing base. 
C)  The activity of proteins is independent of temperature and pH. 
D)  Denaturation is usually reversible. 
E)  All proteins are enzymes. 
A)  Proteins lose some or all of their normal activity if their three-dimensional structure is disrupted. 
B)  Proteins are composed of ribose, phosphate, and a nitrogen-containing base. 
C)  The activity of proteins is independent of temperature and pH. 
D)  Denaturation is usually reversible. 
E)  All proteins are enzymes.

Question 19

The following amino acid would be characterized as __________ based on the chemical properties of its side chain.

Accepted Answer

A)  nonpolar 
B)  acidic 
C)  basic 
D)  hydrophilic 
E)  electrically charged 
A)  nonpolar 
B)  acidic 
C)  basic 
D)  hydrophilic 
E)  electrically charged

Question 20

MATCHING
Match the molecule with the appropriate word or phrase.
a.carbohydrate
c.nucleic acid
b.lipid
d.protein
-consist of monomers having 20 different types

Accepted Answer

The answer of MATCHING
Match the molecule with the appropriate word...

Exam 3: The Chemistry of Life: Organic Compounds

Glycogen consists of beta-glucose monomers. __________________

Figure 3-3 Use the figure to answer the corresponding question(s). -The type of connection between the atoms at the point labeled 1 in Figure 3-3 is:

If the differently shaded portions of this molecule represent different polypeptide chains, then this figure is representative of:

What macromolecule is composed entirely of beta-glucose units?

Which pair matches the correct macromolecule with the bond that joins its subunits?

The two molecules in the following figure represent:

An amphipathic molecule has:

A beta-pleated sheet is an example of a protein's tertiary structure. __________________

A single protein may have several domains. __________________

Which of the following statements concerning steroids is FALSE?

A disaccharide is composed of two monosaccharides joined by a glycosidic linkage. __________________

ATP is important in living organisms because:

Figure 3-2 Use the figure below to answer the corresponding question(s). -Hydrophobic interactions would occur between the R groups of which two amino acids in Figure 3-2?

Figure 3-2 Use the figure below to answer the corresponding question(s). -The tertiary structure of proteins is typified by the:

MATCHING Match the molecule with the appropriate word or phrase. a.carbohydrate c.nucleic acid b.lipid d.protein -contains purines and pyrimidines

MATCHING Match the molecule with the appropriate word or phrase. a.carbohydrate c.nucleic acid b.lipid d.protein -starch

A chemical reaction in which polymers are synthesized from their building blocks is called:

Which of the following statements is true of proteins?

The following amino acid would be characterized as __________ based on the chemical properties of its side chain.

MATCHING Match the molecule with the appropriate word or phrase. a.carbohydrate c.nucleic acid b.lipid d.protein -consist of monomers having 20 different types

A View of Life

Atoms and Molecules: the Chemical Basis of Life

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Dna: the Carrier of Genetic Information

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

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