Question

quiz! which of the following graphs best shows the relationship between the reaction rate of an enzyme - catalyzed reaction and substrate concentration? rate of reaction fast slow low high rate of reaction fast slow low high rate of reaction fast slow low high rate of reaction fast slow low high

Explanation:

At low substrate concentrations, the rate of an enzyme - catalyzed reaction increases linearly with substrate concentration as there are plenty of free enzyme molecules available to bind to the substrate. As substrate concentration increases further, the rate of the reaction starts to level off because the enzyme molecules become saturated with substrate and there are no free enzyme molecules to bind additional substrate. This results in a hyperbolic - shaped curve.

Answer:

B. The graph with a curve that starts out increasing linearly at low substrate concentrations and then levels off at high substrate concentrations.