The Primary Factor That Controls Metabolism Is

Question

The primary factor that controls metabolism is:
A) post-translational modification of enzymes.
B) substrate availability.
C) enzyme turnover.
D) hormone signaling.
E) compartmentalization of metabolic pathways.

Accepted Answer

Substrate availability is the primary factor that controls metabolism. The rate of metabolism is determined by the concentration of substrates available for the enzymes to act upon. Other factors such as enzyme turnover, post-translational modification, hormone signaling, and compartmentalization can also play a role, but they are ultimately dependent on the availability of substrates.