ENZYMES
REVIEW GAME
Many names for enzymes end in the suffix
A. acid
B. ose
C. ase
D. hyde
Many names for enzymes end in the suffix
A. acid
B. ose
C. ase
D. hyde
What is the general function of enzymes within a cell?
A) to promote the synthesis of monomers
B) to induce chemical reactions
C) to stop chemical reactions
D) to speed up chemical reactions
What is the general function of enzymes within a cell?
A) to promote the synthesis of monomers
B) to induce chemical reactions
C) to stop chemical reactions
D) to speed up chemical reactions
A child is brought to the hospital with a fever of 107°F. Doctors immediately order
an ice bath to lower the child's temperature. Which of the following statements
offers the most logical explanation for this action?
A)Elevated body temperature will increase reaction rates in the child's cells and
overload the limited number of enzymes found in the cell.
B) Elevated body temperatures may denature enzymes. This would interfere with
the cell's abilities to catalyze various reactions.
C) Elevated body temperatures will increase the energy of activation needed to
start various chemical reactions in the body. This will interfere with the ability of
enzymes to catalyze vital chemical reactions.
D) Elevated body temperatures cause molecules to vibrate more quickly and
prevent enzymes from easily attaching to reactants. This would slow vital body
reactions.
A child is brought to the hospital with a fever of 107°F. Doctors immediately order
an ice bath to lower the child's temperature. Which of the following statements
offers the most logical explanation for this action?
A)Elevated body temperature will increase reaction rates in the child's cells and
overload the limited number of enzymes found in the cell.
B) Elevated body temperatures may denature enzymes. This would interfere with
the cell's abilities to catalyze various reactions.
C) Elevated body temperatures will increase the energy of activation needed to
start various chemical reactions in the body. This will interfere with the ability of
enzymes to catalyze vital chemical reactions.
D) Elevated body temperatures cause molecules to vibrate more quickly and
prevent enzymes from easily attaching to reactants. This would slow vital body
reactions.
The chemical reaction below depicts the hydrolysis of the
disaccharide sucrose into two monosaccharides as catalyzed
by the enzyme sucrase.
Sucrose --> Fructose + Glucose.
What is/are the “substrate” for this reaction
A) Sucrose
B) Sucrase
C) Fructose
D) Glucose
E) C and D
The chemical reaction below depicts the hydrolysis of the
disaccharide sucrose into two monosaccharides as catalyzed
by the enzyme sucrase.
Sucrose --> Fructose + Glucose.
What is/are the “substrate” for this reaction
A) Sucrose
B) Sucrase
C) Fructose
D) Glucose
E) C and D
The chemical reaction below depicts the hydrolysis of the
disaccharide sucrose into two monosaccharides as catalyzed
by the enzyme sucrase.
Sucrose --> Fructose + Glucose.
What is/are the “product” for this reaction
A) Sucrose
B) Sucrase
C) Fructose
D) Glucose
E) C and D
The chemical reaction below depicts the hydrolysis of the
disaccharide sucrose into two monosaccharides as catalyzed
by the enzyme sucrase.
Sucrose --> Fructose + Glucose.
What is/are the “product” for this reaction
A) Sucrose
B) Sucrase
C) Fructose
D) Glucose
E) C and D
Substrates bind to an enzyme's ________ site.
A) allosteric
B) inhibitory
C) phosphate
D) active
Substrates bind to an enzyme's ________ site.
A) allosteric
B) inhibitory
C) phosphate
D) active
The effect of temperature on the relative rate of action
of an enzyme is represented in the graph below.
The optimum temperature for the action of this enzyme is
approximately
a. 15◦C
b. 22◦C
c. 37◦C
d. 50◦C
The effect of temperature on the relative rate of action
of an enzyme is represented in the graph below.
The optimum temperature for the action of this enzyme is
approximately
a. 15◦C
b. 22◦C
c. 37◦C
d. 50◦C
Use the diagram below to answer the question.
Identify the parts involved.
A.A and B are enzymes and C is the substrate
B.C is the enzyme and A and B are the substrates.
C.A is the enzyme, B is the monomer and C is the polymer
D.A and B are the substrates and C is the polymer
Use the diagram below to answer the question.
Identify the parts involved.
A.A and B are enzymes and C is the substrate
B.C is the enzyme and A and B are the substrates.
C.A is the enzyme, B is the monomer and C is the polymer
D.A and B are the substrates and C is the polymer
The enzyme salivary amylase will act on starch but not on
protein. This action illustrates that salivary amylase
A. contains starch
B. is not reusable
C. is substrate specific
D. lacks protein
The enzyme salivary amylase will act on starch but not on
protein. This action illustrates that salivary amylase
A. contains starch
B. is not reusable
C. is substrate specific
D. lacks protein
A person may become lactose intolerant if their
intestinal glands do not produce enough
A. maltase enzyme
B. lactase enzyme
C. lactose enzyme
D. maltose enzyme
A person may become lactose intolerant if their
intestinal glands do not produce enough
A. maltase enzyme
B. lactase enzyme
C. lactose enzyme
D. maltose enzyme
When an enzyme catalyzes a reaction,
A) it lowers the activation energy of the reaction.
B) it raises the activation energy of the reaction.
C) it acts as a reactant.
D) it is used once and discarded.
When an enzyme catalyzes a reaction,
A) it lowers the activation energy of the reaction.
B) it raises the activation energy of the reaction.
C) it acts as a reactant.
D) it is used once and discarded.
Which of the following statements regarding
enzymes is true?
A) Enzymes are inorganic.
B) An enzyme's function is unaffected by changes in
pH.
C) Enzymes catalyze specific reactions.
D) Enzymes slow down the rate of a chemical
reaction.
Which of the following statements regarding
enzymes is true?
A) Enzymes are inorganic.
B) An enzyme's function is unaffected by changes in
pH.
C) Enzymes catalyze specific reactions.
D) Enzymes slow down the rate of a chemical
reaction.
Heating inactivates enzymes by
A) breaking the covalent bonds that hold the
molecule together.
B) removing phosphate groups from the enzyme.
C) causing enzyme molecules to stick together.
D) changing the enzyme's three-dimensional shape.
Heating inactivates enzymes by
A) breaking the covalent bonds that hold the
molecule together.
B) removing phosphate groups from the enzyme.
C) causing enzyme molecules to stick together.
D) changing the enzyme's three-dimensional shape.
The active site of an enzyme is
A) the region of a substrate that is changed by an
enzyme.
B) the highly changeable portion of an enzyme that
adapts to fit the substrates of various reactions.
C) the region of an enzyme that attaches to a
substrate.
D) the region of a product that detaches from the
enzyme.
The active site of an enzyme is
A) the region of a substrate that is changed by an
enzyme.
B) the highly changeable portion of an enzyme that
adapts to fit the substrates of various reactions.
C) the region of an enzyme that attaches to a
substrate.
D) the region of a product that detaches from the
enzyme.
Which of the following characteristics of protein will
remain intact if the protein is denatured?
A) the shape of the protein
B) the function of the protein
C) the number of amino acids in the protein
D) the binding properties of the protein
Which of the following characteristics of protein will
remain intact if the protein is denatured?
A) the shape of the protein
B) the function of the protein
C) the number of amino acids in the protein
D) the binding properties of the protein
The shape of the _______________ on the enzyme
determines to which ___________________ the enzyme
can bind.
A.
B.
C.
D.
active area; substrate
active site; product
loading dock; organelle
active site; substrate
The shape of the _______________ on the enzyme
determines to which ___________________ the enzyme
can bind.
A.
B.
C.
D.
active area; substrate
active site; product
loading dock; organelle
active site; substrate
There are many different enzymes located in a single cell.
Why do enzymes catalyze a specific reaction?
A.
B.
C.
Most enzymes can catalyze many different reactions.
The shape of the enzyme’s active site determines to
which substrate the particular enzyme can bind.
Enzymes are transported to specific substrates
(reactants) by ribosomes.
There are many different enzymes located in a single cell.
Why do enzymes catalyze a specific reaction?
A.
B.
C.
Most enzymes can catalyze many different reactions.
The shape of the enzyme’s active site determines to
which substrate the particular enzyme can bind.
Enzymes are transported to specific substrates
(reactants) by ribosomes.
List at LEAST THREE environmental factors that affect the
reaction rate of an enzyme:
1.
_____________________
2.
_____________________
3.
_____________________
List at LEAST THREE environmental factors that affect the
reaction rate of an enzyme:
1.
pH
2.
TEMPERATURE
3.
CONCENTRATION OF SUBSTRATE
4.
CONCENTRATION OF ENZYME
5.
SALT CONCENTRATION
When an enzyme has become misfolded or
unfolded and can no longer perform it’s function,
we say that the enzyme is
“_____________________.”
When an enzyme has become misfolded or
unfolded and can no longer perform it’s function,
we say that the enzyme is
“DENATURED.”
List TWO environmental factors that tend to denature
enzymes:
1.
_____________________
2.
_____________________
List TWO environmental factors that tend to denature
enzymes:
1.
Changes in pH
2.
INCREASE IN TEMPERATURE
3.
Changes in SALT CONCENTRATION
Which of the following statements about enzymes is
false?
A) They increase the rate of chemical reactions.
B) They function as chemical catalysts.
C) They regulate virtually all chemical reactions in a
cell.
D) They are monomers used to build proteins.
Which of the following statements about enzymes is
false?
A) They increase the rate of chemical reactions.
B) They function as chemical catalysts.
C) They regulate virtually all chemical reactions in a
cell.
D) They are monomers used to build proteins.