Question 1

Match the following.
-activation

Accepted Answer

A) a description of the catalytic activity of an enzyme,where a small value means that very few molecules are acted on in a unit of time 
B) a substance that prevents harmful reactions of free radicals 
C) any process that increases the rate of an enzyme catalyzed reaction 
D) a type of enzyme that catalyzes the removal of a small molecule from a larger one 
E) a type of enzyme that catalyzes the internal rearrangement of molecules
F)an inactive form of an enzyme; also called a proenzyme
G)a description of enzyme activity based on an exact match between the shapes of the active site and the substrate molecule
H)a type of enzyme that catalyzes the joining of two molecules together
I)a type of enzyme that catalyzes the transfer of a functional group from one molecule to another
J)a type of enzyme that catalyzes the breakdown of large molecules by reaction with water
K)a description of enzyme activity based on the ability of the enzyme to change shape in order to accommodate substrate molecules
L)a type of enzyme that catalyzes oxidation or reduction reactions
M)a small organic molecule necessary for good health that must be obtained in the diet
N)any process which decreases the rate of an enzyme catalyzed reaction 
A) a description of the catalytic activity of an enzyme,where a small value means that very few molecules are acted on in a unit of time 
B) a substance that prevents harmful reactions of free radicals 
C) any process that increases the rate of an enzyme catalyzed reaction 
D) a type of enzyme that catalyzes the removal of a small molecule from a larger one 
E) a type of enzyme that catalyzes the internal rearrangement of molecules
F)an inactive form of an enzyme; also called a proenzyme
G)a description of enzyme activity based on an exact match between the shapes of the active site and the substrate molecule
H)a type of enzyme that catalyzes the joining of two molecules together
I)a type of enzyme that catalyzes the transfer of a functional group from one molecule to another
J)a type of enzyme that catalyzes the breakdown of large molecules by reaction with water
K)a description of enzyme activity based on the ability of the enzyme to change shape in order to accommodate substrate molecules
L)a type of enzyme that catalyzes oxidation or reduction reactions
M)a small organic molecule necessary for good health that must be obtained in the diet
N)any process which decreases the rate of an enzyme catalyzed reaction

Question 2

Match the following.
-inhibition

Accepted Answer

A) a description of the catalytic activity of an enzyme,where a small value means that very few molecules are acted on in a unit of time 
B) a substance that prevents harmful reactions of free radicals 
C) any process that increases the rate of an enzyme catalyzed reaction 
D) a type of enzyme that catalyzes the removal of a small molecule from a larger one 
E) a type of enzyme that catalyzes the internal rearrangement of molecules
F)an inactive form of an enzyme; also called a proenzyme
G)a description of enzyme activity based on an exact match between the shapes of the active site and the substrate molecule
H)a type of enzyme that catalyzes the joining of two molecules together
I)a type of enzyme that catalyzes the transfer of a functional group from one molecule to another
J)a type of enzyme that catalyzes the breakdown of large molecules by reaction with water
K)a description of enzyme activity based on the ability of the enzyme to change shape in order to accommodate substrate molecules
L)a type of enzyme that catalyzes oxidation or reduction reactions
M)a small organic molecule necessary for good health that must be obtained in the diet
N)any process which decreases the rate of an enzyme catalyzed reaction 
A) a description of the catalytic activity of an enzyme,where a small value means that very few molecules are acted on in a unit of time 
B) a substance that prevents harmful reactions of free radicals 
C) any process that increases the rate of an enzyme catalyzed reaction 
D) a type of enzyme that catalyzes the removal of a small molecule from a larger one 
E) a type of enzyme that catalyzes the internal rearrangement of molecules
F)an inactive form of an enzyme; also called a proenzyme
G)a description of enzyme activity based on an exact match between the shapes of the active site and the substrate molecule
H)a type of enzyme that catalyzes the joining of two molecules together
I)a type of enzyme that catalyzes the transfer of a functional group from one molecule to another
J)a type of enzyme that catalyzes the breakdown of large molecules by reaction with water
K)a description of enzyme activity based on the ability of the enzyme to change shape in order to accommodate substrate molecules
L)a type of enzyme that catalyzes oxidation or reduction reactions
M)a small organic molecule necessary for good health that must be obtained in the diet
N)any process which decreases the rate of an enzyme catalyzed reaction

Question 3

Match the following.
-isomerase

Accepted Answer

A) a description of the catalytic activity of an enzyme,where a small value means that very few molecules are acted on in a unit of time 
B) a substance that prevents harmful reactions of free radicals 
C) any process that increases the rate of an enzyme catalyzed reaction 
D) a type of enzyme that catalyzes the removal of a small molecule from a larger one 
E) a type of enzyme that catalyzes the internal rearrangement of molecules
F)an inactive form of an enzyme; also called a proenzyme
G)a description of enzyme activity based on an exact match between the shapes of the active site and the substrate molecule
H)a type of enzyme that catalyzes the joining of two molecules together
I)a type of enzyme that catalyzes the transfer of a functional group from one molecule to another
J)a type of enzyme that catalyzes the breakdown of large molecules by reaction with water
K)a description of enzyme activity based on the ability of the enzyme to change shape in order to accommodate substrate molecules
L)a type of enzyme that catalyzes oxidation or reduction reactions
M)a small organic molecule necessary for good health that must be obtained in the diet
N)any process which decreases the rate of an enzyme catalyzed reaction 
A) a description of the catalytic activity of an enzyme,where a small value means that very few molecules are acted on in a unit of time 
B) a substance that prevents harmful reactions of free radicals 
C) any process that increases the rate of an enzyme catalyzed reaction 
D) a type of enzyme that catalyzes the removal of a small molecule from a larger one 
E) a type of enzyme that catalyzes the internal rearrangement of molecules
F)an inactive form of an enzyme; also called a proenzyme
G)a description of enzyme activity based on an exact match between the shapes of the active site and the substrate molecule
H)a type of enzyme that catalyzes the joining of two molecules together
I)a type of enzyme that catalyzes the transfer of a functional group from one molecule to another
J)a type of enzyme that catalyzes the breakdown of large molecules by reaction with water
K)a description of enzyme activity based on the ability of the enzyme to change shape in order to accommodate substrate molecules
L)a type of enzyme that catalyzes oxidation or reduction reactions
M)a small organic molecule necessary for good health that must be obtained in the diet
N)any process which decreases the rate of an enzyme catalyzed reaction

Question 4

How is the rate of an enzyme catalyzed reaction affected by increasing enzyme concentration?

Accepted Answer

A) The rate increases as the concentration of enzyme increases with excess substrate. 
B) The rate decreases as the concentration of enzyme increases. 
C) The rate initially increases as the concentration of enzyme increases,but then remains constant in spite of increasing amount of enzyme. 
D) The rate initially increases as the concentration of enzyme increases,but then decreases once the concentration of enzyme passes an optimum level. 
E) none of the above 
A) The rate increases as the concentration of enzyme increases with excess substrate. 
B) The rate decreases as the concentration of enzyme increases. 
C) The rate initially increases as the concentration of enzyme increases,but then remains constant in spite of increasing amount of enzyme. 
D) The rate initially increases as the concentration of enzyme increases,but then decreases once the concentration of enzyme passes an optimum level. 
E) none of the above

Question 5

What is the function of enzymes?

Accepted Answer

A) structure and support 
B) energy reserves 
C) biochemical catalysts 
D) communication between cells 
E) physical protection 
A) structure and support 
B) energy reserves 
C) biochemical catalysts 
D) communication between cells 
E) physical protection

Question 6

Which mechanism of enzyme control determines the amount of enzyme available?

Accepted Answer

A) allosteric control 
B) competitive inhibition 
C) zymogen production 
D) covalent modification 
E) genetic control 
A) allosteric control 
B) competitive inhibition 
C) zymogen production 
D) covalent modification 
E) genetic control

Question 7

Which is the correct term for the inactive form of an enzyme,often used for transport or storage?

Accepted Answer

A) coenzyme 
B) apoenzyme 
C) zymogen 
D) inhibitor 
E) activator 
A) coenzyme 
B) apoenzyme 
C) zymogen 
D) inhibitor 
E) activator

Question 8

Each of the following phrases correctly describes enzymes except

Accepted Answer

A) dissolve in water. 
B) have a globular shape. 
C) behave as substrates. 
D) contain an active site. 
E) act as catalysts. 
A) dissolve in water. 
B) have a globular shape. 
C) behave as substrates. 
D) contain an active site. 
E) act as catalysts.

Question 9

The genetic control strategy of enzyme control is most useful for production of enzymes that

Accepted Answer

A) act as hydrolases. 
B) function for only one specific reaction. 
C) are produced as zymogens. 
D) require vitamins as cofactors. 
E) are needed only at certain stages of development. 
A) act as hydrolases. 
B) function for only one specific reaction. 
C) are produced as zymogens. 
D) require vitamins as cofactors. 
E) are needed only at certain stages of development.

Question 10

An enzyme that catalyzes addition or removal of hydrogen or oxygen on substrate molecules is a(an)________.

Accepted Answer

A) ligase 
B) isomerase 
C) oxidoreductase 
D) transferase 
E) hydrolase 
A) ligase 
B) isomerase 
C) oxidoreductase 
D) transferase 
E) hydrolase

Question 11

Which of the following fat-soluble vitamins is associated with blood clotting factors?

Accepted Answer

A) Vitamin A 
B) Vitamin D 
C) Vitamin E 
D) Vitamin K 
E) More than one answer is possible. 
A) Vitamin A 
B) Vitamin D 
C) Vitamin E 
D) Vitamin K 
E) More than one answer is possible.

Question 12

Poisons such as heavy metal ions or insecticides can disrupt enzyme function by

Accepted Answer

A) competitive inhibition. 
B) irreversible inhibition. 
C) disruption of tertiary structure. 
D) covalent modification. 
E) all of the above 
A) competitive inhibition. 
B) irreversible inhibition. 
C) disruption of tertiary structure. 
D) covalent modification. 
E) all of the above

Question 13

Match the following.
-turnover number

Accepted Answer

A) a description of the catalytic activity of an enzyme,where a small value means that very few molecules are acted on in a unit of time 
B) a substance that prevents harmful reactions of free radicals 
C) any process that increases the rate of an enzyme catalyzed reaction 
D) a type of enzyme that catalyzes the removal of a small molecule from a larger one 
E) a type of enzyme that catalyzes the internal rearrangement of molecules
F)an inactive form of an enzyme; also called a proenzyme
G)a description of enzyme activity based on an exact match between the shapes of the active site and the substrate molecule
H)a type of enzyme that catalyzes the joining of two molecules together
I)a type of enzyme that catalyzes the transfer of a functional group from one molecule to another
J)a type of enzyme that catalyzes the breakdown of large molecules by reaction with water
K)a description of enzyme activity based on the ability of the enzyme to change shape in order to accommodate substrate molecules
L)a type of enzyme that catalyzes oxidation or reduction reactions
M)a small organic molecule necessary for good health that must be obtained in the diet
N)any process which decreases the rate of an enzyme catalyzed reaction 
A) a description of the catalytic activity of an enzyme,where a small value means that very few molecules are acted on in a unit of time 
B) a substance that prevents harmful reactions of free radicals 
C) any process that increases the rate of an enzyme catalyzed reaction 
D) a type of enzyme that catalyzes the removal of a small molecule from a larger one 
E) a type of enzyme that catalyzes the internal rearrangement of molecules
F)an inactive form of an enzyme; also called a proenzyme
G)a description of enzyme activity based on an exact match between the shapes of the active site and the substrate molecule
H)a type of enzyme that catalyzes the joining of two molecules together
I)a type of enzyme that catalyzes the transfer of a functional group from one molecule to another
J)a type of enzyme that catalyzes the breakdown of large molecules by reaction with water
K)a description of enzyme activity based on the ability of the enzyme to change shape in order to accommodate substrate molecules
L)a type of enzyme that catalyzes oxidation or reduction reactions
M)a small organic molecule necessary for good health that must be obtained in the diet
N)any process which decreases the rate of an enzyme catalyzed reaction

Question 14

The theory of enzyme mechanism that suggests a flexible molecule whose shape is altered by the reaction conditions is the ________ model.

Accepted Answer

A) coenzyme 
B) induced-fit 
C) lock-and-key 
D) substrate specific 
E) active site 
A) coenzyme 
B) induced-fit 
C) lock-and-key 
D) substrate specific 
E) active site

Question 15

The name of an enzyme can often be recognized by the ending

Accepted Answer

A) -ase. 
B) -ate. 
C) -ic acid. 
D) -ene. 
E) -ose. 
A) -ase. 
B) -ate. 
C) -ic acid. 
D) -ene. 
E) -ose.

Exam 19: Enzymes and Vitamins

Match the following. -activation

Match the following. -inhibition

Match the following. -isomerase

How is the rate of an enzyme catalyzed reaction affected by increasing enzyme concentration?

What is the function of enzymes?

Which mechanism of enzyme control determines the amount of enzyme available?

Which is the correct term for the inactive form of an enzyme,often used for transport or storage?

Each of the following phrases correctly describes enzymes except

The genetic control strategy of enzyme control is most useful for production of enzymes that

An enzyme that catalyzes addition or removal of hydrogen or oxygen on substrate molecules is a(an)________.

Which of the following fat-soluble vitamins is associated with blood clotting factors?

Poisons such as heavy metal ions or insecticides can disrupt enzyme function by

Match the following. -turnover number

The theory of enzyme mechanism that suggests a flexible molecule whose shape is altered by the reaction conditions is the ________ model.

The name of an enzyme can often be recognized by the ending

Matter and Measurements

Atoms and the Periodic Table

Ionic Compounds

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Amines

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

The Generation of Biochemical Energy

Carbohydrates

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Protein and Amino Acid Metabolism

Chemical Messengers: Hormones, neurotransmitters, and Drugs

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