AP BIOLOGY

Detailed explanation-1: -Initially, an increase in substrate concentration leads to an increase in the rate of an enzyme-catalyzed reaction. As the enzyme molecules become saturated with substrate, this increase in reaction rate levels off. The rate of an enzyme-catalyzed reaction increases with an increase in the concentration of an enzyme.

Detailed explanation-2: -Increasing Substrate Concentration increases the rate of reaction. This is because more substrate molecules will be colliding with enzyme molecules, so more product will be formed.

Detailed explanation-3: -More collisions increase the likelihood that substrate will collide with the active site of the enzyme, thus increasing the rate of an enzyme-catalyzed reaction.

Detailed explanation-4: -Most enzymes only catalyze reactions in one direction. An increase in the affinity of an enzyme for its substrate will increase the reaction rate. According to the induced fit model for enzymes, the binding of substrate to the active site alters the structure of the enzyme.