AP BIOLOGY CHAPTER 6- ENERGY
AND ENZYME EXAM QUESTIONS WITH
COMPLETE SOLUTIONS
a group of students designed an experiment using the enzyme catalyses and its
substrate hydrogen peroxide. (H2O2) the results are as follows:
a) this data confirms the presence of a competitive inhibitor
b) this data is useful in the determination of the rate of the enzymatic reaction
c) this data is useful to show the concentration of the product of the catalyzed
reaction
d) this data is useful to show the concentration of the substrate remaining -
ANSWER-B
a further experiment by the same group of students found the small increase in the
temperature of the enzyme catalase and the substrate hydrogen peroxide (H2O2)
produced a significant increase in the amount of substrate degraded. which of these
possible explanations is the most likely reason for the increase enzymatic activity
a) evaporation due to the increased temperature increased the concentration of the
solutions and as a result increased the reaction rate
b) the increased temperature caused the enzyme and the substrate to move faster
and collide more frequently
c) the increased temperature has caused the enzyme to become denatured
d) the increased temperature removed a noncompetitive inhibitor for the enzyme -
ANSWER-B
why is ATP necessary in living systems?
a) it supplies energy needed to synthesize macro-molecules within the cell
b) it is the energy source for muscles to contract
c) it supplies energy required to pump substances across the plasma membranes
d) all of the above - ANSWER-D
enzymes with their highest activity at an acidic pH are represented by which if the
following graphs
, a) II only
b) III only
c) I and III only
d) I only - ANSWER-B
graphs representing enzymes sensitive to changes in pH include which of the
following?
a) I only
b) II and IV only
c) II only
d) I, II and III only - ANSWER-D
the most likely explanation for the results showin in graph I is that
a) pH affects the primary structure of an enzyme
b) pH affects the shape of the active site of the enzyme
c) the enzyme has no tertiary structure
d) pH affects the temperature of the reaction - ANSWER-B
which form of energy is correctly associated with an example?
a) potential energy- water rushing down a narrow gorge
b) chemical energy- sunlight
c) kinetic energy- movement of muscles
d) kinetic energy- fat molecules - ANSWER-c
which best describes the first law of thermodynamics?
a) energy transfers are always 100% efficient in changing energy from one useful
form to another
b) energy is not created nor destroyed, but it can change into matter
c) some useful energy is lost as heat whenever an energy transfer occurs
d) energy is not created nor destroyed, but it can change from one energy form to
another - ANSWER-D
AND ENZYME EXAM QUESTIONS WITH
COMPLETE SOLUTIONS
a group of students designed an experiment using the enzyme catalyses and its
substrate hydrogen peroxide. (H2O2) the results are as follows:
a) this data confirms the presence of a competitive inhibitor
b) this data is useful in the determination of the rate of the enzymatic reaction
c) this data is useful to show the concentration of the product of the catalyzed
reaction
d) this data is useful to show the concentration of the substrate remaining -
ANSWER-B
a further experiment by the same group of students found the small increase in the
temperature of the enzyme catalase and the substrate hydrogen peroxide (H2O2)
produced a significant increase in the amount of substrate degraded. which of these
possible explanations is the most likely reason for the increase enzymatic activity
a) evaporation due to the increased temperature increased the concentration of the
solutions and as a result increased the reaction rate
b) the increased temperature caused the enzyme and the substrate to move faster
and collide more frequently
c) the increased temperature has caused the enzyme to become denatured
d) the increased temperature removed a noncompetitive inhibitor for the enzyme -
ANSWER-B
why is ATP necessary in living systems?
a) it supplies energy needed to synthesize macro-molecules within the cell
b) it is the energy source for muscles to contract
c) it supplies energy required to pump substances across the plasma membranes
d) all of the above - ANSWER-D
enzymes with their highest activity at an acidic pH are represented by which if the
following graphs
, a) II only
b) III only
c) I and III only
d) I only - ANSWER-B
graphs representing enzymes sensitive to changes in pH include which of the
following?
a) I only
b) II and IV only
c) II only
d) I, II and III only - ANSWER-D
the most likely explanation for the results showin in graph I is that
a) pH affects the primary structure of an enzyme
b) pH affects the shape of the active site of the enzyme
c) the enzyme has no tertiary structure
d) pH affects the temperature of the reaction - ANSWER-B
which form of energy is correctly associated with an example?
a) potential energy- water rushing down a narrow gorge
b) chemical energy- sunlight
c) kinetic energy- movement of muscles
d) kinetic energy- fat molecules - ANSWER-c
which best describes the first law of thermodynamics?
a) energy transfers are always 100% efficient in changing energy from one useful
form to another
b) energy is not created nor destroyed, but it can change into matter
c) some useful energy is lost as heat whenever an energy transfer occurs
d) energy is not created nor destroyed, but it can change from one energy form to
another - ANSWER-D
