Question 1

When placed in solution, an inorganic substance dissociates completely, forming hydrogen ions and anions. This substance would be a

Accepted Answer

A)  strong base. 
B)  weak base. 
C)  strong acid. 
D)  weak acid. 
E)  salt. 
A)  strong base. 
B)  weak base. 
C)  strong acid. 
D)  weak acid. 
E)  salt.

Question 2

Which statement is true regarding atomic structure and function?

Accepted Answer

A)  Electrons and protons comprise the nucleus of the atom. 
B)  An atom is electrically neutral, having the same number of positively charged protons and negatively charged electrons. 
C)  Neutrons are found in orbits around the atomic nucleus. 
D)  The charge of an atom depends on where the protons and electrons are located. 
E)  All shells around the nucleus optimally contain 8 electrons. 
A)  Electrons and protons comprise the nucleus of the atom. 
B)  An atom is electrically neutral, having the same number of positively charged protons and negatively charged electrons. 
C)  Neutrons are found in orbits around the atomic nucleus. 
D)  The charge of an atom depends on where the protons and electrons are located. 
E)  All shells around the nucleus optimally contain 8 electrons.

Question 3

The mass number represents the number of

Accepted Answer

A)  protons in an atom. 
B)  electrons in an ion. 
C)  neutrons in an atom. 
D)  protons and neutrons in an atom. 
E)  neutrons and electrons in an atom. 
A)  protons in an atom. 
B)  electrons in an ion. 
C)  neutrons in an atom. 
D)  protons and neutrons in an atom. 
E)  neutrons and electrons in an atom.

Question 4

Figure 2-1 A Chemical Reaction
Use Figure 2-1 to answer the following question:
Determine which reaction is shown in the figure and specify its mechanism of action.

Accepted Answer

A)  The addition of a water molecule breaks down a complex molecule. 
B)  The removal of a water molecule breaks down a complex molecule. 
C)  Ionic bonds are broken apart as individual ions interact with the positive or negative ends of polar water molecules. 
D)  The removal of a water molecule facilitates the union of two molecules. 
E)  The addition of a water molecule facilitates the union of two molecules. 
A)  The addition of a water molecule breaks down a complex molecule. 
B)  The removal of a water molecule breaks down a complex molecule. 
C)  Ionic bonds are broken apart as individual ions interact with the positive or negative ends of polar water molecules. 
D)  The removal of a water molecule facilitates the union of two molecules. 
E)  The addition of a water molecule facilitates the union of two molecules.

Question 5

The symbol ⇌, used in visual chemical reactions, means that

Accepted Answer

A)  the chemical reaction can go in either direction. 
B)  the concentration of the end products is the same as that of the reactants. 
C)  the substrates can become reactants and vice versa. 
D)  there is more end product than reactant. 
E)  input of energy is required. 
A)  the chemical reaction can go in either direction. 
B)  the concentration of the end products is the same as that of the reactants. 
C)  the substrates can become reactants and vice versa. 
D)  there is more end product than reactant. 
E)  input of energy is required.

Question 6

The molecule DNA contains the unique five-carbon sugar

Accepted Answer

A)  ribose. 
B)  pentose. 
C)  deoxyribose. 
D)  sucrose. 
E)  fructose. 
A)  ribose. 
B)  pentose. 
C)  deoxyribose. 
D)  sucrose. 
E)  fructose.

Question 7

Which statement is true about cells?

Accepted Answer

A)  Carbohydrates direct the production of all proteins made by the cell. 
B)  Enzymes, required by the cell for chemical reactions, consist of nucleotides. 
C)  A cell is composed of all of the 4 major organic compound groups. 
D)  All carbohydrates in a cell come from the diet that the organism eats. 
E)  A membrane of nucleic acids separates the cell from its environment and gives the cell its feature of semipermeability. 
A)  Carbohydrates direct the production of all proteins made by the cell. 
B)  Enzymes, required by the cell for chemical reactions, consist of nucleotides. 
C)  A cell is composed of all of the 4 major organic compound groups. 
D)  All carbohydrates in a cell come from the diet that the organism eats. 
E)  A membrane of nucleic acids separates the cell from its environment and gives the cell its feature of semipermeability.

Question 8

The nucleic acid DNA

Accepted Answer

A)  is double stranded. 
B)  contains uracil in place of thymine. 
C)  contains the pentose ribose. 
D)  contains protein bases. 
E)  synthesizes lipids. 
A)  is double stranded. 
B)  contains uracil in place of thymine. 
C)  contains the pentose ribose. 
D)  contains protein bases. 
E)  synthesizes lipids.

Question 9

A buffer

Accepted Answer

A)  removes or replaces hydrogen ions in a solution. 
B)  is a compound with an extra electron in its outer shell. 
C)  has an unstable nucleus, making it highly reactive. 
D)  donates hydrogen ions to a solution. 
E)  consists of long carbon-carbon chains. 
A)  removes or replaces hydrogen ions in a solution. 
B)  is a compound with an extra electron in its outer shell. 
C)  has an unstable nucleus, making it highly reactive. 
D)  donates hydrogen ions to a solution. 
E)  consists of long carbon-carbon chains.

Question 10

You are working with a particular protein in your research lab to determine how its properties affect the function of the protein. To determine what consequences there might be on protein function, you decide to change just one amino acid of the entire length of the protein, which consists of a total of 100 amino acids. You have just directly changed the ________ structure of the protein.

Accepted Answer

A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  binary 
A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  binary

Question 11

A mixture of water and a salt would result in breaking down the salt into a mixture of cations and anions. This process is called

Accepted Answer

A)  dehydration synthesis. 
B)  dissociation. 
C)  hydrolysis. 
D)  condensation reaction. 
E)  equilibrium. 
A)  dehydration synthesis. 
B)  dissociation. 
C)  hydrolysis. 
D)  condensation reaction. 
E)  equilibrium.

Question 12

Hydrolysis is an example of which type of reaction?

Accepted Answer

A)  exchange 
B)  reversible 
C)  anabolism 
D)  synthesis 
E)  decomposition 
A)  exchange 
B)  reversible 
C)  anabolism 
D)  synthesis 
E)  decomposition

Question 13

Which of the following is an example of a strong base?

Accepted Answer

A)  NaCl 
B)  NaOH 
C)  HCl 
D)  KF 
E)  H2O 
A)  NaCl 
B)  NaOH 
C)  HCl 
D)  KF 
E)  H2O

Question 14

Ions with a negative charge are called

Accepted Answer

A)  cations. 
B)  anions. 
C)  radicals. 
D)  polyatomic ions. 
E)  None of these is correct. 
A)  cations. 
B)  anions. 
C)  radicals. 
D)  polyatomic ions. 
E)  None of these is correct.

Question 15

Figure 2-4 An Overview of the Structures of Organic Compounds in the Body
Use Figure 2-4 to answer the following questions:
-Glucose-based starches are an example of the structure labeled #1. Identify the structure.

Accepted Answer

A)  triglyceride 
B)  polysaccharide 
C)  glycerol 
D)  steroid 
E)  phospholipid 
A)  triglyceride 
B)  polysaccharide 
C)  glycerol 
D)  steroid 
E)  phospholipid

Question 16

If a substance resists changes in pH, either by removing or replacing hydrogen ions, it is called

Accepted Answer

A)  neutral. 
B)  acidic. 
C)  alkaline. 
D)  a buffer. 
E)  a salt. 
A)  neutral. 
B)  acidic. 
C)  alkaline. 
D)  a buffer. 
E)  a salt.

Question 17

Which statement about the reaction H2 + Cl2 → 2HCl is correct?

Accepted Answer

A)  H2 and Cl2 are the products. 
B)  HCl is the product. 
C)  One molecule of hydrogen contains one atom. 
D)  One molecule of chlorine contains one atom. 
E)  The reaction is unbalanced. 
A)  H2 and Cl2 are the products. 
B)  HCl is the product. 
C)  One molecule of hydrogen contains one atom. 
D)  One molecule of chlorine contains one atom. 
E)  The reaction is unbalanced.

Question 18

Amino acids contain a central carbon atom adjacent to a(n) ________ group and a(n) ________ group.

Accepted Answer

A)  carboxyl; phosphate 
B)  nitrogenous; carboxyl 
C)  nitrogenous; amino 
D)  amino; carboxyl 
E)  amino; phosphate 
A)  carboxyl; phosphate 
B)  nitrogenous; carboxyl 
C)  nitrogenous; amino 
D)  amino; carboxyl 
E)  amino; phosphate

Question 19

Each amino acid forms bonds by connecting its carboxyl group to the next amino acid's

Accepted Answer

A)  central carbon atom. 
B)  amino group. 
C)  carboxyl group. 
D)  hydroxyl group. 
E)  hydroxide group. 
A)  central carbon atom. 
B)  amino group. 
C)  carboxyl group. 
D)  hydroxyl group. 
E)  hydroxide group.

Question 20

Which of the following is an organic compound?

Accepted Answer

A)  CO2 
B)  CH4 
C)  H2O 
D)  CCl4 
E)  HCl 
A)  CO2 
B)  CH4 
C)  H2O 
D)  CCl4 
E)  HCl

When placed in solution, an inorganic substance dissociates completely, forming hydrogen ions and anions. This substance would be a

Which statement is true regarding atomic structure and function?

The mass number represents the number of

Figure 2-1 A Chemical Reaction Use Figure 2-1 to answer the following question: Determine which reaction is shown in the figure and specify its mechanism of action.

The symbol ⇌, used in visual chemical reactions, means that

The molecule DNA contains the unique five-carbon sugar

Which statement is true about cells?

The nucleic acid DNA

A buffer

A mixture of water and a salt would result in breaking down the salt into a mixture of cations and anions. This process is called

Hydrolysis is an example of which type of reaction?

Which of the following is an example of a strong base?

Ions with a negative charge are called

Figure 2-4 An Overview of the Structures of Organic Compounds in the Body Use Figure 2-4 to answer the following questions: -Glucose-based starches are an example of the structure labeled #1. Identify the structure.

If a substance resists changes in pH, either by removing or replacing hydrogen ions, it is called

Which statement about the reaction H₂ + Cl₂ → 2HCl is correct?

Amino acids contain a central carbon atom adjacent to a(n) group and a(n) group.

Each amino acid forms bonds by connecting its carboxyl group to the next amino acid's

Which of the following is an organic compound?

An Introduction to Anatomy and Physiology

Cell Structure and Function

The Tissue Level of Organization

The Integumentary System

The Skeletal System

The Muscular System

The Nervous System

The General and Special Senses

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: the Heart

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

The Reproductive System

Development and Inheritance

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Exam 2: The Chemical Level of Organization

When placed in solution, an inorganic substance dissociates completely, forming hydrogen ions and anions. This substance would be a

Which statement is true regarding atomic structure and function?

The mass number represents the number of

Figure 2-1 A Chemical Reaction Use Figure 2-1 to answer the following question: Determine which reaction is shown in the figure and specify its mechanism of action.

The symbol ⇌, used in visual chemical reactions, means that

The molecule DNA contains the unique five-carbon sugar

Which statement is true about cells?

The nucleic acid DNA

A buffer

A mixture of water and a salt would result in breaking down the salt into a mixture of cations and anions. This process is called

Hydrolysis is an example of which type of reaction?

Which of the following is an example of a strong base?

Ions with a negative charge are called

Figure 2-4 An Overview of the Structures of Organic Compounds in the Body Use Figure 2-4 to answer the following questions: -Glucose-based starches are an example of the structure labeled #1. Identify the structure.

If a substance resists changes in pH, either by removing or replacing hydrogen ions, it is called

Which statement about the reaction H2 + Cl2 → 2HCl is correct?

Amino acids contain a central carbon atom adjacent to a(n) ________ group and a(n) ________ group.

Each amino acid forms bonds by connecting its carboxyl group to the next amino acid's

Which of the following is an organic compound?

An Introduction to Anatomy and Physiology

Cell Structure and Function

The Tissue Level of Organization

The Integumentary System

The Skeletal System

The Muscular System

The Nervous System

The General and Special Senses

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: the Heart

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

The Reproductive System

Development and Inheritance

Filters

Which statement about the reaction H₂ + Cl₂ → 2HCl is correct?

Amino acids contain a central carbon atom adjacent to a(n) group and a(n) group.