Final answer:
An increase in enzyme concentration leads to an increase in reaction velocity, provided there is sufficient substrate present. The rate of reaction increases steadily with an increase in enzyme concentration until enzymes become saturated with substrate.
Step-by-step explanation:
Complete the following paragraph explaining how reaction velocity depends on enzyme concentration. The amount of enzyme is normally less than the amount of substrate. Therefore, if you increase the amount of enzyme, you will see an increase in the reaction velocity, provided sufficient substrate is present. This is because as enzyme concentration increases, the rate of reaction increases steadily, given there is an excess amount of substrate. Initially, an increase in substrate concentration leads to an increase in the rate of an enzyme-catalyzed reaction, but this rate levels off as enzyme molecules become saturated with substrate. Reaction velocity depends directly on enzyme concentration when it is lower than substrate concentration.