At substrate concentrations much lower than the enzyme concentration, A)the rate of reaction is expected to be inversely proportional to substrate concentration. B)the rate of reaction is expected to be directly proportional to substrate concentration. C)first order enzyme kinetics are not observed. D)the K_M is lower. E)the rate of reaction is independent of substrate concentration.

Question

Quizplus · Accepted Answer

At substrate concentrations much lower than the enzyme concentration, the rate of reaction is expected to be directly proportional to substrate concentration because the enzyme is not limiting and as substrate concentration increases, more substrate molecules will be available to bind with the enzyme and form the enzyme-substrate complex. This will ultimately lead to an increase in the rate of reaction.

At Substrate Concentrations Much Lower Than the Enzyme Concentration