LSU BIOL 4087 exam 2 Lee MULTIPLE CHOICE QUESTIONS AND
ANSWERS COMPLETE SOLUTION Louisiana State University LSU BIOL 4087 exam 2 Lee MULTIPLE CHOICE QUESTIONS AND ANSWERS
COMPLETE SOLUTION Louisiana State University
BIOL4087 EXAM II
40 questions – each worth 2.5 points
1.Which statement about enzymes is correct:
A.Enzymes drive reactions to completion (all substrate converted to product)
B.Enzymes shift the equilibrium towards the production of product
C.They are specific for the substrate and prevent the conversion of product back to substrate
D.Lower the activation energy for the reaction
E.Are consumed in the reaction they catalyze.
2.The concept of “induced fit” refers to:
A.The enzyme is made more specific when substrate binds
B.The enzyme turns the substrate over at its maximal rate
C.The rate of the enzyme can be fitted to the Michaelis-Menten equation
D.The enzyme will no longer bind the product
E.Substrate binding induces a conformational change in the enzyme active site
3.The steady state assumption, as applied to enzyme kinetics, implies:
A.The ES complex is formed and broken down at equivalent rates
B.Km is equivalent to the substrate concentration at the half-maximal velocity
C.The maximum velocity occurs when the enzyme is saturated with substrate
D.The enzyme is inhibited
E.All substrate has been converted to product
4.Vmax, the maximum velocity of an enzyme-catalyzed reaction is:
A.The rate of product formation when all enzyme active sites are saturated with substrate
B.Independent of the amount of enzyme present
C.The rate of the enzymatic reaction when the concentration of S and E are equal
D.Equal to Km
E.Expressed in units of M (molar)
5.A molecule that decreases the activity of an enzyme by binding to a site other than the active site is called:
A.Competitive inhibitor
B.Non-competitive inhibitor
C.Feedback inhibitor
D.Catalytic inhibitor
E.Active site inhibitor
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