Question 1

DNA carries genetic information in its

Accepted Answer

A)  sugar groups. 
B)  sequence of bases. 
C)  helical form. 
D)  phosphate groups. 
E)  tertiary structure. 
A)  sugar groups. 
B)  sequence of bases. 
C)  helical form. 
D)  phosphate groups. 
E)  tertiary structure.

Question 2

Two categories of organic compounds typically provide energy for living systems. Representatives of these two classes are

Accepted Answer

A)  carbohydrates and proteins. 
B)  proteins and nucleic acids. 
C)  carbohydrates and nucleic acids. 
D)  lipids and proteins. 
E)  carbohydrates and lipids. 
A)  carbohydrates and proteins. 
B)  proteins and nucleic acids. 
C)  carbohydrates and nucleic acids. 
D)  lipids and proteins. 
E)  carbohydrates and lipids.

Question 3

Hydrolysis may be correctly described as the

Accepted Answer

A)  removal of water from a polymer. 
B)  breaking of a compound into its subunits by using water to break the bond between monomers. 
C)  heating of a compound in order to drive off its excess water and to concentrate its volume. 
D)  constant removal of hydrogen atoms from a carbohydrate. 
A)  removal of water from a polymer. 
B)  breaking of a compound into its subunits by using water to break the bond between monomers. 
C)  heating of a compound in order to drive off its excess water and to concentrate its volume. 
D)  constant removal of hydrogen atoms from a carbohydrate.

Question 4

Keratin and silk are examples of_________ , whereas glucose and maltose are examples of _________.

Accepted Answer

A)  carbohydrates; proteins 
B)  proteins; lipids 
C)  nucleic acids; lipids 
D)  proteins; carbohydrates 
A)  carbohydrates; proteins 
B)  proteins; lipids 
C)  nucleic acids; lipids 
D)  proteins; carbohydrates

Question 5

Explain how a saturated fat is structurally different from an unsaturated fat.

Accepted Answer

A saturated fat has three fatty acids th

Question 6

Your classmate is trying to keep all the facts about biological molecules straight. He asks you to explain how amino acids and proteins are related. What do you tell him?

Accepted Answer

A)  Proteins are a portion of an amino acid. 
B)  Proteins are chains of carbohydrates, and amino acids are a type of lipid. 
C)  Proteins are made up of chains of amino acids. 
D)  Amino acids are formed by joining together many proteins. 
A)  Proteins are a portion of an amino acid. 
B)  Proteins are chains of carbohydrates, and amino acids are a type of lipid. 
C)  Proteins are made up of chains of amino acids. 
D)  Amino acids are formed by joining together many proteins.

Question 7

The carbohydrate in DNA is

Accepted Answer

A)  ribose. 
B)  phosphate. 
C)  deoxyribose. 
D)  cellulose. 
E)  glucose. 
A)  ribose. 
B)  phosphate. 
C)  deoxyribose. 
D)  cellulose. 
E)  glucose.

Question 8

Which of the following statements about lipids is incorrect?

Accepted Answer

A)  They are short chains of polar hydrocarbons. 
B)  They are used for energy storage. 
C)  They are hydrophobic and water insoluble. 
D)  They are large chains of nonpolar hydrocarbons. 
E)  They are primary component of cell membranes. 
A)  They are short chains of polar hydrocarbons. 
B)  They are used for energy storage. 
C)  They are hydrophobic and water insoluble. 
D)  They are large chains of nonpolar hydrocarbons. 
E)  They are primary component of cell membranes.

Question 9

Which of the following is insoluble in water?

Accepted Answer

A)  DNA 
B)  Salt 
C)  Amino acids 
D)  Olive oil 
E)  Sucrose 
A)  DNA 
B)  Salt 
C)  Amino acids 
D)  Olive oil 
E)  Sucrose

Question 10

Functional groups determine the characteristics and chemical reactivity of organic molecules.

Accepted Answer

A) True 
 B)False

Question 11

What are some of the similarities and differences between DNA and RNA?

Accepted Answer

DNA uses the nucleotides A-T-G

Question 12

What maintains the secondary structure of a protein?

Accepted Answer

A)  Hydrogen bonds 
B)  Peptide bonds 
C)  Disulfide bonds 
D)  Ionic bonds 
A)  Hydrogen bonds 
B)  Peptide bonds 
C)  Disulfide bonds 
D)  Ionic bonds

Question 13

Describe the differences between saturated and unsaturated fatty acids. Which is most likely to be solid at room temperature? Why?

Accepted Answer

Saturated fats have only single C-C bond

Question 14

Which of the following best explains the molecular complexity of living organisms?

Accepted Answer

A)  Each organism has its own unique set of monomers for use in constructing polymers. 
B)  The large number of different monomers allows for the construction of many polymers. 
C)  Condensation reactions can create different polymers because they can combine virtually any molecules in the cell. 
D)  A small number of monomers can be assembled into large polymers with many different combinations/sequences. 
E)  Although there are not many biological molecules in cells, each one has many different functions. 
A)  Each organism has its own unique set of monomers for use in constructing polymers. 
B)  The large number of different monomers allows for the construction of many polymers. 
C)  Condensation reactions can create different polymers because they can combine virtually any molecules in the cell. 
D)  A small number of monomers can be assembled into large polymers with many different combinations/sequences. 
E)  Although there are not many biological molecules in cells, each one has many different functions.

Question 15

Which nucleotide molecule functions as an energy carrier in the cell?

Accepted Answer

The answer of Which nucleotide molecule functions as an energy...

Question 16

Suppose you have discovered a new virus and have isolated its nucleic acids. What feature could you look for to determine whether the nucleic acids of this virus are RNA or DNA?

Accepted Answer

A)  If it is DNA, the virus will not contain proteins. 
B)  If it is RNA, there will be no adenine. 
C)  If is RNA, it will contain deoxyribose. 
D)  If it is RNA, it will contain ribose. 
A)  If it is DNA, the virus will not contain proteins. 
B)  If it is RNA, there will be no adenine. 
C)  If is RNA, it will contain deoxyribose. 
D)  If it is RNA, it will contain ribose.

Question 17

All of the following lipids or lipid components are hydrophobic EXCEPT

Accepted Answer

A)  saturated fats. 
B)  waxes. 
C)  fatty acid tails. 
D)  unsaturated fats. 
E)  fatty acid heads. 
A)  saturated fats. 
B)  waxes. 
C)  fatty acid tails. 
D)  unsaturated fats. 
E)  fatty acid heads.

Question 18

Which of the following biological molecules are composed of monomer units containing a sugar, a phosphate group, and a nitrogen-containing base?

Accepted Answer

A)  Carbohydrates 
B)  Lipids 
C)  Proteins 
D)  Nucleic acids 
A)  Carbohydrates 
B)  Lipids 
C)  Proteins 
D)  Nucleic acids

Question 19

Which type of molecule is most abundant in a typical cell?

Accepted Answer

A)  Water 
B)  Carbohydrate 
C)  Lipid 
D)  Protein 
E)  Nucleic acids 
A)  Water 
B)  Carbohydrate 
C)  Lipid 
D)  Protein 
E)  Nucleic acids

Question 20

New government regulations require that foods containing trans fats be labeled appropriately. A trans fat is formed when food manufacturers turn liquid oils into solid fats by adding hydrogen to vegetable oils. This hydrogenation process produces a solid fat because adding the hydrogen

Accepted Answer

A)  forms a wax molecule. 
B)  allows fats to form tertiary and quaternary structures. 
C)  allows the fatty acid chains to pack together more tightly. 
D)  causes a phospholipid to form. 
A)  forms a wax molecule. 
B)  allows fats to form tertiary and quaternary structures. 
C)  allows the fatty acid chains to pack together more tightly. 
D)  causes a phospholipid to form.

Exam 3: Biological Molecules

DNA carries genetic information in its

Two categories of organic compounds typically provide energy for living systems. Representatives of these two classes are

Hydrolysis may be correctly described as the

Keratin and silk are examples of_________ , whereas glucose and maltose are examples of _________.

Explain how a saturated fat is structurally different from an unsaturated fat.

Your classmate is trying to keep all the facts about biological molecules straight. He asks you to explain how amino acids and proteins are related. What do you tell him?

The carbohydrate in DNA is

Which of the following statements about lipids is incorrect?

Which of the following is insoluble in water?

Functional groups determine the characteristics and chemical reactivity of organic molecules.

What are some of the similarities and differences between DNA and RNA?

What maintains the secondary structure of a protein?

Describe the differences between saturated and unsaturated fatty acids. Which is most likely to be solid at room temperature? Why?

Which of the following best explains the molecular complexity of living organisms?

Which nucleotide molecule functions as an energy carrier in the cell?

Suppose you have discovered a new virus and have isolated its nucleic acids. What feature could you look for to determine whether the nucleic acids of this virus are RNA or DNA?

All of the following lipids or lipid components are hydrophobic EXCEPT

Which of the following biological molecules are composed of monomer units containing a sugar, a phosphate group, and a nitrogen-containing base?

Which type of molecule is most abundant in a typical cell?

New government regulations require that foods containing trans fats be labeled appropriately. A trans fat is formed when food manufacturers turn liquid oils into solid fats by adding hydrogen to vegetable oils. This hydrogenation process produces a solid fat because adding the hydrogen

An Introduction to Life on Earth

Atoms, Molecules, and Life

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

DNA: The Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

Filters

Keratin and silk are examples of_ , whereas glucose and maltose are examples of _.