Question 1

The bonding of two amino acid molecules to form a larger molecule requires which of the following?

Accepted Answer

A)  Addition of a water molecule 
B)  Both removal of a water molecule and formation of a hydrogen bond 
C)  Formation of a hydrogen bond 
D)  Removal of a water molecule 
E)  Formation of a glycosidic bond 
A)  Addition of a water molecule 
B)  Both removal of a water molecule and formation of a hydrogen bond 
C)  Formation of a hydrogen bond 
D)  Removal of a water molecule 
E)  Formation of a glycosidic bond

Question 2

Which of these is NOT a nucleic acid or nucleotide?

Accepted Answer

A)  RNA 
B)  ATP 
C)  LDL 
D)  DNA 
A)  RNA 
B)  ATP 
C)  LDL 
D)  DNA

Question 3

Which of the following groups is crucial to the structure and function of the sex hormones estrogen and testosterone?

Accepted Answer

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

Question 4

You have curly hair, and your brother has straight hair. Describe how the proteins of your curly hair are different from the proteins of his straight hair.

Accepted Answer

The keratin proteins in your curly hair

Question 5

RNA differs from DNA in that RNA contains the sugar .

Accepted Answer

The answer of RNA differs from DNA in that RNA...

Question 6

Hydrolysis may be correctly described as the

Accepted Answer

A)  breaking of a compound into its subunits by using water to break the bond between monomers. 
B)  removal of water from a polymer. 
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)  breaking of a compound into its subunits by using water to break the bond between monomers. 
B)  removal of water from a polymer. 
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 7

Which of the following correctly matches an organic polymer with its monomers, respectively?

Accepted Answer

A)  DNA; ATP 
B)  Carbohydrate; polysaccharides 
C)  Protein; amino acids 
D)  Hydrocarbon; monosaccharides 
E)  Lipid; steroids 
A)  DNA; ATP 
B)  Carbohydrate; polysaccharides 
C)  Protein; amino acids 
D)  Hydrocarbon; monosaccharides 
E)  Lipid; steroids

Question 8

HDL and LDL are different types of cholesterol found in the blood. These compounds are

Accepted Answer

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

Question 9

Which of the following is NOT an organic molecule?

Accepted Answer

A)  Carbon monoxide 
B)  Lipid 
C)  Protein 
D)  Monosaccharide 
E)  Nucleic acid 
A)  Carbon monoxide 
B)  Lipid 
C)  Protein 
D)  Monosaccharide 
E)  Nucleic acid

Question 10

Chitin is an example of a

Accepted Answer

A)  peptide. 
B)  monomer. 
C)  polysaccharide. 
D)  nucleic acid. 
E)  triglyceride. 
A)  peptide. 
B)  monomer. 
C)  polysaccharide. 
D)  nucleic acid. 
E)  triglyceride.

Question 11

If digestion is , then synthesis is .

Accepted Answer

A)  organic; inorganic 
B)  hydrolysis; dehydration synthesis 
C)  dehydration synthesis; hydrolysis 
D)  inorganic; organic 
A)  organic; inorganic 
B)  hydrolysis; dehydration synthesis 
C)  dehydration synthesis; hydrolysis 
D)  inorganic; organic

Question 12

Proteins are formed by joining amino acids together into a polymer. A _ bond joins the amino end of one amino acid with the carboxyl end of another.

Accepted Answer

The answer of Proteins are formed by joining amino acids...

Question 13

Phospholipids have hydrophilic tail regions and hydrophobic head regions.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following may possess primary, secondary, tertiary, and quaternary structures?

Accepted Answer

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

Question 15

In this scenario, how are the soap, dirt/oil, and water arranged at the molecular level?

Accepted Answer

A)  Water and dirt/oil form covalent bonds inside a small droplet that has a soap- based outer membrane. 
B)  The soap molecules encase the dirt/oil within a small droplet that has a hydrophilic exterior and a hydrophobic interior. 
C)  The soap is converted into a lipid that binds to the dirt/oil while repelling the water. 
D)  The soap molecules encase the dirt/oil within a small droplet that has a hydrophobic exterior and a hydrophilic interior. 
A)  Water and dirt/oil form covalent bonds inside a small droplet that has a soap- based outer membrane. 
B)  The soap molecules encase the dirt/oil within a small droplet that has a hydrophilic exterior and a hydrophobic interior. 
C)  The soap is converted into a lipid that binds to the dirt/oil while repelling the water. 
D)  The soap molecules encase the dirt/oil within a small droplet that has a hydrophobic exterior and a hydrophilic interior.

Question 16

The four polypeptides that are joined together to make functional hemoglobin represent which level of protein organization?

Accepted Answer

A)  Tertiary structure 
B)  Primary structure 
C)  Secondary structure 
D)  Quaternary structure 
A)  Tertiary structure 
B)  Primary structure 
C)  Secondary structure 
D)  Quaternary structure

Question 17

DNA carries genetic information in its

Accepted Answer

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

Question 18

You are telling your friend that organic molecules are all made up of carbon backbones with hydrogens. She doesn't understand how there can be so many different organic molecules if they all are made up of the same basic components. You explain that organic molecules

Accepted Answer

A)  actually all have the same structure but differ in the number of electrons. 
B)  are different because of the different types of hydrogen bonds that form. 
C)  vary because they possess different isotopes of carbon. 
D)  vary because they possess different functional groups. 
A)  actually all have the same structure but differ in the number of electrons. 
B)  are different because of the different types of hydrogen bonds that form. 
C)  vary because they possess different isotopes of carbon. 
D)  vary because they possess different functional groups.

Question 19

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

Accepted Answer

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

Question 20

How do two amino acids, such as lysine and methionine, differ from each other?

Accepted Answer

They have

Exam 3: Biological Molecules

The bonding of two amino acid molecules to form a larger molecule requires which of the following?

Which of these is NOT a nucleic acid or nucleotide?

Which of the following groups is crucial to the structure and function of the sex hormones estrogen and testosterone?

You have curly hair, and your brother has straight hair. Describe how the proteins of your curly hair are different from the proteins of his straight hair.

RNA differs from DNA in that RNA contains the sugar .

Hydrolysis may be correctly described as the

Which of the following correctly matches an organic polymer with its monomers, respectively?

HDL and LDL are different types of cholesterol found in the blood. These compounds are

Which of the following is NOT an organic molecule?

Chitin is an example of a

If digestion is , then synthesis is .

Proteins are formed by joining amino acids together into a polymer. A _ bond joins the amino end of one amino acid with the carboxyl end of another.

Phospholipids have hydrophilic tail regions and hydrophobic head regions.

Which of the following may possess primary, secondary, tertiary, and quaternary structures?

In this scenario, how are the soap, dirt/oil, and water arranged at the molecular level?

The four polypeptides that are joined together to make functional hemoglobin represent which level of protein organization?

DNA carries genetic information in its

You are telling your friend that organic molecules are all made up of carbon backbones with hydrogens. She doesn't understand how there can be so many different organic molecules if they all are made up of the same basic components. You explain that organic molecules

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

How do two amino acids, such as lysine and methionine, differ from each other?

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

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