Deck 19: Enzymes and Vitamins

Question 1

Each of the following phrases correctly describes enzymes except

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

Answer 1

behave as substrates.

Question 2

Which aspect of enzyme structure is related to our dietary need for trace minerals?

A)cofactor
B)active site
C)turnover number
D)chirality
E)none of these

Answer 2

cofactor

Question 3

Explain the term specificity as it applies to enzyme activity.

Answer 3

Specificity describes the degree of restriction of the activity of an enzyme.Most enzymes only catalyze a specific type of reaction,as evidenced by the broad terms transferase,oxidoreductase,etc.However,some enzymes may act on only one specific substrate molecule.For example,one hydrolase may act on any amide linkage in a peptide,while another hydrolase will only act on the linkage between a specific pair of amino acids.The precise shape of the active site is often the determining factor in specificity.One analogy for describing this is using the specific key for your office versus using a master key that opens your office and many others.

Question 4

The tertiary structure of most enzymes is

A)an α-helix.
B)a β-pleated sheet.
C)fibrous.
D)globular.
E)none of these.

Question 5

Transaminase can be classified as a(an)________ because its function is moving an amine group from one molecule to another.

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

Question 6

An enzyme that is classified as a hydrolase is involved in ________ reactions.

A)oxidation
B)reduction
C)isomerization
D)polymerization
E)hydrolysis

Question 7

Enzymes function as catalysts by

A)changing the value of the free energy change to a more favorable value.
B)changing the value of the equilibrium constant to a more favorable value.
C)lowering the value of the activation energy.
D)increasing the amount of time needed to reach equilibrium.
E)becoming one of the reactants.

Question 8

Which of the following combinations is required to create a holoenzyme?

A)effector + coenzyme
B)apoenzyme + activator
C)apoenzyme + coenzyme
D)None of the above are correct combinations.

Question 9

The reactant in an enzyme-catalyzed reaction is called the

A)hormone.
B)substrate.
C)cofactor.
D)inhibitor.
E)vitamin.

Question 10

Enzymes are members of which class of biomolecules?

A)carbohydrates
B)lipids
C)nucleic acids
D)proteins
E)steroids

Question 11

The nonprotein portion required by some enzymes for proper functioning is called a(an)

A)zymogen.
B)substrate.
C)inhibitor.
D)cofactor.
E)activator.

Question 12

A synthetase can be classified as a(an)________ because its function is joining two molecules together.

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

Question 13

Enzymes increase the rates of only certain reactions involving certain substances.This general characteristic is called

A)selectivity.
B)specificity.
C)enzyme regulation.
D)catalytic efficiency.
E)enzyme inhibition.

Question 14

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

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

Question 15

What is the function of enzymes?

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

Question 16

Which term identifies the relatively small portion of the enzyme that is directly involved in the biochemical reaction being catalyzed?

A)substrate
B)active site
C)N-terminal
D)C-terminal
E)precursor

Question 17

The following reaction would most likely be catalyzed by an enzyme of which class?
Sucrose + H₂O → glucose + fructose

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

Question 18

An enzyme that catalyzes the conversion of a cis double bond to a trans double bond is classified as a(an)

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

Question 19

The maximum number of substrate molecules that one enzyme molecule can act on in a given unit of time is the

A)turnover number.
B)equilibrium constant.
C)rate constant.
D)reduction factor.
E)catalytic multiplier.

Question 20

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

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

Question 21

Substances the bind to an enzyme and increase its activity are called

A)negative regulators.
B)positive regulators.
C)allosteric regulators.
D)neutral regulators.

Question 22

The mechanism of enzyme control that is similar to noncompetitive inhibition because both involve interactions with the enzyme at locations other than the active site is

A)feedback inhibition.
B)zymogen production.
C)zymogen activation.
D)allosteric interaction.
E)genetic control.

Question 23

Explain how an allosteric enzyme is regulated.

Question 24

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

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

Question 25

Enzymes that are affected by the binding of an inhibitor are called

A)induced enzymes.
B)allosteric enzymes.
C)proenzymes.
D)zymogens.
E)controlled enzymes.

Question 26

A multi-step biochemical process in which the rate of an early step is affected by the concentration of products of a later step is said to be subject to

A)decomposition.
B)feedback control.
C)hydrolysis.
D)pH control.
E)all of the above

Question 27

In a normal biochemical system,the rate of a specific reaction is determined by

A)pH and temperature.
B)pH and enzyme efficiency.
C)temperature and enzyme efficiency.
D)temperature and substrate concentration.
E)enzyme efficiency and substrate concentration.

Question 28

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

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 29

When there is an increase in temperature it can affect an enzyme-catalyzed reaction by

A)increasing the reaction rate
B)decreasing the reaction rate
C)both increasing and decreasing the reaction rate
D)causing a different substrate to be used

Question 30

Which of the following is the typical shape of a plot showing the rate of an enzyme-catalyzed reaction as a function of the pH?

A)

B)

C)

D)

Question 31

Which factor is not important in explaining how enzymes work?

A)Two different substrate molecules are brought into close contact.
B)Substrates are brought into solution more easily.
C)The bonds in substrates are subjected to strains which weaken them.
D)Substrates are forced into the correct orientation for interaction.
E)Substrates are placed near acidic or basic sites.

Question 32

When an enzyme is saturated it

A)has been completely consumed,and that reaction cannot occur again until new enzymes are produced.
B)is in high concentration relative to the substrate,and the reaction rate is directly proportional to substrate concentration.
C)is in low concentration relative to the substrate,and the reaction rate is directly proportional to enzyme concentration.
D)is in low concentration relative to the substrate,and the reaction rate approaches its maximum.
E)none of the above

Question 33

The theory of enzyme mechanism that suggests a rigid,inflexible molecule is the ________ model.

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

Question 34

When substrate molecules occupy all of the active sites in the enzyme available for a particular reaction,the enzyme is said to be

A)denatured.
B)hydrolyzed.
C)activated.
D)inhibited.
E)saturated.

Question 35

Enzymes that are affected by the binding of an activator are called

A)zymogens.
B)proenzymes.
C)allosteric enzymes.
D)induced enzymes.

Question 36

Enzymes have an optimum temperature for their catalytic activity.This is best explained by the balance between the ________ number of collisions and the ________ rate of denaturation of the enzyme as temperatures increase.

A)increased; increased
B)decreased; increased
C)increased; decreased
D)decreased; decreased
E)none of the above

Question 37

Which of the following is the typical shape of a plot showing the rate of an enzyme-catalyzed reaction as a function of the enzyme concentration with excess substrate?

A)

B)

C)

D)

Question 38

Which of the following does not generally increase the rate of a reaction?

A)increasing the reactants
B)increasing the products
C)increasing the temperature
D)adding the catalyst

Question 39

When a molecule similar to the correct substrate interacts with the active site of an enzyme,the process is called

A)competitive inhibition.
B)noncompetitive inhibition.
C)irreversible inhibition.
D)activation.
E)covalent modification.

Question 40

Explain the term feedback as a mechanism for control of biochemical reactions.

Question 41

All of the following statements concerning vitamins are true except

A)fat-soluble vitamins have a high proportion of polar carbonyl and hydroxyl groups.
B)it is possible to overdose on fat-soluble vitamins because they accumulate in fatty tissues.
C)it is difficult to overdose on water-soluble vitamins because excess amounts can be excreted in the urine.
D)vitamins A,D,E,and K are fat-soluble.
E)vitamin C and the B vitamins are water-soluble.

Question 42

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

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 43

Activation of zymogens involves the chemical process of

A)hydrogen bonding.
B)covalent modification.
C)complete hydrolysis.
D)denaturation.
E)oxidation-reduction.

Question 44

Another term for substances that bind irreversibly with the active site of an enzyme is

A)activators.
B)poisons.
C)coenzymes.
D)hormones.
E)zymogens.

Question 45

When a metal ion such as Pb(II)interferes with the functioning of an enzyme,the most probable mechanism is

A)feedback control.
B)reversible noncompetitive inhibition.
C)genetic control.
D)reversible competitive inhibition.
E)irreversible inhibition.

Question 46

Which of the following fat-soluble vitamins is associated with good night vision?

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

Question 47

All of the following vitamins are fat soluble except

A)Vitamin A.
B)Vitamin K.
C)Vitamin C.
D)Vitamin D.
E)Vitamin E.

Question 48

If a covalent bond forms between an enzyme and an inhibitor the reaction catalyzed by this enzyme will have undergone ________.

A)irreversible inhibition
B)competitive inhibition
C)noncompetitive inhibition
D)feedback control
E)genetic control

Question 49

A compound that is necessary for the synthesis of another compound is called a(an)

A)allosteric inhibitor.
B)cofactor.
C)precursor.
D)proenzyme.
E)zymogen.

Question 50

Antioxidants contribute to good health by reacting with

A)coenzymes.
B)vitamins.
C)hormones.
D)free radicals.
E)hydrogen ions.

Question 51

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

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

Question 52

All of the following are mechanisms for control of enzyme activity except

A)inhibition.
B)feedback.
C)allosteric interactions.
D)genetic regulation.
E)hydrolysis.

Question 53

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

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

Question 54

When a molecule other than the correct substrate interacts with some part of an enzyme to alter the shape of the active site,the process is called

A)competitive inhibition.
B)noncompetitive inhibition.
C)irreversible inhibition.
D)activation.
E)covalent modification.

Question 55

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

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

Question 56

Some enzymes are produced as zymogens because

A)the reactions they catalyze are undesirable at the site of production.
B)they must have both an active site and an allosteric site,and these can't be produced simultaneously.
C)the actual enzyme molecules are so large that they must be produced in pieces and assembled as needed.
D)the pH at the site of production is very different from the pH at the site where they are used.
E)none of these

Question 57

All of the following are B vitamins except

A)ascorbic acid.
B)cobalamin.
C)niacin.
D)pantothenic acid.
E)thiamine.

Question 58

A vitamin is

A)a nutrient involving trace metals that is necessary for good health.
B)a polypeptide used to manufacture enzymes.
C)a lipid complex which is an important part of all cells.
D)a small organic molecule obtained from the diet and necessary for good health.
E)a complex molecule of four interlocking hydrocarbon rings.

Question 59

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

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

Question 60

Noncompetitive inhibition can be overcome by

A)increasing the concentration of substrate.
B)increasing the concentration of enzyme.
C)decreasing the concentration of inhibitor.
D)decreasing the concentration of products.
E)decreasing the concentration of substrate.

Question 61

Match the following.
lyase

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 62

Match the following.
antioxidant

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 63

Match the following.
ligase

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 64

Match the following.
inhibition

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 65

Match the following.
transferase

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 66

Overdosing on vitamins A and D is more likely than overdosing on vitamin C because

A)vitamins A and D are fat soluble and thus can accumulate in body fat,where vitamin C is water soluble and the excess will be excreted in urine.
B)vitamin C is fat soluble and thus can accumulate in body fat,where vitamins A and D are water soluble and the excess will be excreted in urine.
C)vitamin C is biologically active as consumed in foods,but vitamins A and D must be converted into biologically active forms before utilization.
D)vitamins A and D are biologically active as consumed in foods,but vitamin C must be converted into biologically active forms before utilization.
E)vitamins A and D are needed in much larger doses than vitamin C.

Question 67

Match the following.
induced-fit model

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 68

Match the following.
oxidoreductase

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 69

Match the following.
vitamin

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 70

Match the following.
lock-and-key model

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 71

Match the following.
hydrolase

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 72

Match the following.
turnover number

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 73

Match the following.
isomerase

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 74

Match the following.
zymogen

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 75

Match the following.
activation

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