Enzymes And Kinetics

Question: A noncompetitive inhibitor of an enzyme-catalyzed reaction
[A].

increases KM and increases Vmax

[B].

increases KM and reduces Vmax

[C].

reduces KM and increases Vmax

[D].

reduces KM and reduces Vmax

Answer: Option B

Explanation:

No answer description available for this question.

Question: Classical noncompetitive inhibition is obtained only under
[A].

slow equilibrium conditions

[B].

moderate equilibrium conditions

[C].

rapid equilibrium conditions

[D].

non-equilibrium conditions

Answer: Option C

Explanation:

No answer description available for this question.

Question: Most enzymes work by
[A].

increasing energy of activation

[B].

decreasing energy of activation

[C].

not affecting energy of activation

[D].

none of the above

Answer: Option B

Explanation:

No answer description available for this question.

Question: A classical noncompetitive inhibitor has
[A].

no effect on substrate binding

[B].

no effect on substrate binding and vice versa

[C].

significant effect on substrate binding

[D].

significant effect on substrate binding and vice versa

Answer: Option B

Explanation:

No answer description available for this question.

Question: A competitive inhibitor of an enzyme is usually
[A].

a highly reactive compound

[B].

a metal ion such as Hg2+ or Pb2+

[C].

structurally similar to the substrate.

[D].

water insoluble

Answer: Option C

Explanation:

No answer description available for this question.

Question: The enzyme inhibition can occur by
[A].

reversible inhibitors

[B].

irreversible inhibitors

[C].

Both (a) and (b)

[D].

None of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Lock and key theory is based on the compatibility of
[A].

enzyme and substrate

[B].

enzyme and product

[C].

enzyme and enzyme substrate complex

[D].

enzyme substrate complex and product

Answer: Option A

Explanation:

No answer description available for this question.

Question: In the steady state the material balance equation for any component of a system is
[A].

rate of addition + rate of removal – rate of formation = 0

[B].

rate of addition – rate of removal + rate of formation = 0

[C].

rate of addition + rate of removal + rate of formation = 0

[D].

none of the above

Answer: Option B

Explanation:

No answer description available for this question.

Question: Quasi steady state is also known as
[A].

Michaelis Menten approach

[B].

Briggs-Haldane approach

[C].

Pseudo steady state

[D].

all of the above

Answer: Option C

Explanation:

No answer description available for this question.

Question: The slope of Lineweaver Burk plot for Michaelis Menten equation is
[A].

Vmax/Km

[B].

Km/Vmax

[C].

1/Km

[D].

Km.Vmax

Answer: Option B

Explanation:

No answer description available for this question.