When the substrate concentration is low, an enzyme reaction
A) will display zero-order kinetics.
B) will display first-order kinetics.
C) will display second-order kinetics.
D) will denature and cease to function.

Question

Quizplus · Accepted Answer

When the substrate concentration is low, an enzyme reaction will display first-order kinetics, meaning the rate of reaction is directly proportional to the concentration of the substrate. This is because there are more active sites available on the enzyme than substrate molecules, so the rate of reaction depends on how frequently enzyme and substrate molecules collide.

When the Substrate Concentration Is Low, an Enzyme Reaction