AP BIOLOGY CHAPTER 8.4-8.5 TEST
QUESTIONS AND ANSWERS
As a result of its involvement in a reaction, an enzyme _____. - ANSWER-is
unchanged
What is the correct label for "A"? - ANSWER-energy of activation
Enzymes are described as catalysts, which means that they _____. - ANSWER-
increase the rate of a reaction without being consumed by the reaction
Which of the following would be unlikely to contribute to the substrate specificity of
an enzyme? - ANSWER-The enzyme has an allosteric regulatory site
Which of the following is NOT a way in which an enzyme can speed up the reaction
that it catalyzes? - ANSWER-The active site can provide heat from the environment
that raises the energy content of the substrate.
Look at the graph of reaction rate versus substrate concentration for an enzyme.
In which region does the reaction rate remain constant? - ANSWER-region C
Refer again to the graph.
In which region is the enzyme saturated with substrate? - ANSWER-region C
Consider a situation in which the enzyme is operating at optimum temperature and
pHpH, and has been saturated with substrate. What is your best option for
increasing the rate of the reaction? - ANSWER-Increase the enzyme concentration.
A(n) __ inhibitor has a structure that is so similar to the substrate that it can bond to
the enzyme just like the substrate. - ANSWER-competitive
A(n) __ inhibitor binds to a site on the enzyme that is not the active site. - ANSWER-
noncompetitive
Usually, a(n) __ inhibitor forms a covalent bond with an amino acid side group within
the active site, which prevents the substrate from entering the active site or prevents
catalytic activity. - ANSWER-irreversible
The competitive inhibitor competes with the substrate for the __ on the enzyme. -
ANSWER-active site
When the noncompetitive inhibitor is bonded to the __, the shape of the enzyme is
distorted. - ANSWER-enzyme
. Enzyme inhibitors disrupt normal interactions between an enzyme and its __. -
ANSWER-substrate
QUESTIONS AND ANSWERS
As a result of its involvement in a reaction, an enzyme _____. - ANSWER-is
unchanged
What is the correct label for "A"? - ANSWER-energy of activation
Enzymes are described as catalysts, which means that they _____. - ANSWER-
increase the rate of a reaction without being consumed by the reaction
Which of the following would be unlikely to contribute to the substrate specificity of
an enzyme? - ANSWER-The enzyme has an allosteric regulatory site
Which of the following is NOT a way in which an enzyme can speed up the reaction
that it catalyzes? - ANSWER-The active site can provide heat from the environment
that raises the energy content of the substrate.
Look at the graph of reaction rate versus substrate concentration for an enzyme.
In which region does the reaction rate remain constant? - ANSWER-region C
Refer again to the graph.
In which region is the enzyme saturated with substrate? - ANSWER-region C
Consider a situation in which the enzyme is operating at optimum temperature and
pHpH, and has been saturated with substrate. What is your best option for
increasing the rate of the reaction? - ANSWER-Increase the enzyme concentration.
A(n) __ inhibitor has a structure that is so similar to the substrate that it can bond to
the enzyme just like the substrate. - ANSWER-competitive
A(n) __ inhibitor binds to a site on the enzyme that is not the active site. - ANSWER-
noncompetitive
Usually, a(n) __ inhibitor forms a covalent bond with an amino acid side group within
the active site, which prevents the substrate from entering the active site or prevents
catalytic activity. - ANSWER-irreversible
The competitive inhibitor competes with the substrate for the __ on the enzyme. -
ANSWER-active site
When the noncompetitive inhibitor is bonded to the __, the shape of the enzyme is
distorted. - ANSWER-enzyme
. Enzyme inhibitors disrupt normal interactions between an enzyme and its __. -
ANSWER-substrate
