Final answer:
The Michaelis-Menten rate equation for reversible mixed inhibition is determined by the (a) substrate concentration.
Step-by-step explanation:
The Michaelis-Menten rate equation for reversible mixed inhibition is written as v-
The subject of this equation is a) Substrate concentration. In the Michaelis-Menten equation, the substrate concentration ([S]) is an important factor that affects the initial reaction rate.
As the substrate concentration increases, the reaction rate also increases, until it reaches a point where the reaction rate plateaus. This is because all the enzyme active sites are saturated with substrate molecules and the reaction rate cannot increase any further.