b - Correct Answer Which of the following is TRUE if a holoenzyme but not an apoenzyme?
A) is catalytically inactive
B) contains a cofactor
C) contains a denatured active site
D) contains more than one active site
d - Correct Answer Which of the following statements is TRUE of carbonic ...
Biochem 1430: Hemoglobin &
Enzymes( Well- Enlightened)
b - Correct Answer Which of the following is TRUE if a holoenzyme but not an
apoenzyme?
A) is catalytically inactive
B) contains a cofactor
C) contains a denatured active site
D) contains more than one active site
d - Correct Answer Which of the following statements is TRUE of carbonic anhydrase?
A) It catalyzes a reaction involving water.
B) It catalyzes a reaction involving CO2.
C) It is a very fast enzyme.
D) All of the above.
c - Correct Answer Which of the following statements is true regarding the role an
enzyme plays in catalysis?
A) An enzyme increases the rate of the forward reaction.
B) An enzyme increases the energy of the transition state so that it breaks down more
rapidly.
C)An enzyme decreases the activation energy.
D) An enzyme increases the equilibrium constant.
d - Correct Answer The maximum velocity or Vmax of an enzyme-catalyzed reaction is:
A) the initial rate observed at very low substrate concentrations.
B) the rate observed at the highest substrate concentration that can be experimentally
obtained.
C) independent of the amount of enzyme present.
D) the rate observed when all enzyme active sites are saturated with substrate.
b - Correct Answer Which of the following is NOT true of a competitive inhibitor?
A) It competes with substrate for binding to the active site.
B) It irreversibly inhibits the enzyme by chemically modifying a group at the active site.
C) Its effects can be overcome by increasing the concentration of substrate.
D)It often resembles the substrate for the enzyme it inhibits.
d - Correct Answer The activity of an enzyme can be regulated by a:
A) competitive inhibitor binding to the active site.
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