Question

question 19 1 pts
why do the cellular concentrations of substrates often approximate the km value of an enzyme?
○ because km represents the absolute minimum substrate concentration required for enzyme activity.
○ because at substrate concentrations near km, the enzyme maintains a balance between responsiveness to changes in substrate levels and efficient catalysis.
○ because at substrate concentrations near km, the enzyme operates at maximal velocity.
○ because substrate concentrations must always be lower than km to prevent enzyme saturation.

Explanation:

Answer:

Because at substrate concentrations near Km, the enzyme maintains a balance between responsiveness to changes in substrate levels and efficient catalysis.