Question

A competitive inhibitor would most closely resemble which of the following?

1) the active site of an enzyme
2) the allosteric site of an enzyme
3) the substrate molecule
4) a coenzyme

Answer 1

3.

Step-by-step explanation:

In competitive inhibition, the inhibitor closely resembles the real substrate and is regarded as a substrate analogue. The inhibitor competes with substrate and binds at the active site of the enzyme but does not undergo any catalysis. As long as the competitive inhibitor holds the active site, the enzyme is not available for the substrate to bind. A competitive inhibitor diminishes the rate of catalysis by reducing the proportion of enzyme molecules bound to a substrate. At any given inhibitor concentration, competitive inhibition can be relieved by increasing the substrate concentration.