Read the following statements and choose the correct answer. Statement-A: A non-competitive inhibitor binds the enzyme at a site distinct from that to which substrate binds. Statement-B: The competitive inhibitor does not affect the rate of breakdown of the enzyme-substrate complex.
Both statements are correct
Both statements are incorrect
Only statement A is correct
Only statement B is correct
Answers
Answer:
Correct option is
B
The presence of the competitive inhibitor decreases the K
m
of the enzyme for the substrate.
Competitive inhibition is a type of enzyme inhibition in which the inhibitor binds to the active site on the enzyme. This prevents binding of the substrate to the enzyme and hence affects the rate of breakdown of the enzyme-substrate complex. Competitive inhibitors bind reversibly to the active site of the enzyme to form an enzyme-inhibitor complex. In this, the maximum velocity (V
max
) is unchanged while K
m
is increased as inhibitor interferes with the binding of substrate and this inhibition can be overcome by increasing the substrate concentration. In this, the inhibitor molecule is not chemically changed by the enzyme.
Thus, the correct answer is option B.
Answer:
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