Answer:
Because sometimes, certain chemical reactions can excite/slow down an organism, and the action needs to be reversed to maintain normality.
It is important that some reactions are reversible for homeostasis, otherwise, the setpoint would be breached.
Homeostasis refers to the maintenance of relatively constant internal processes, usually in living cells.
The normal range of operation of internal processes is known as the setpoint. Below or above this setpoint, the life of cells might be in danger.
For example, consider the reaction below:
A + B ---> C
Assuming the setpoint concentration of C in a cell is 0.5 - 0.7 M and all of a sudden, the concentration of C exceeds 0.7 M, there should be a way for the hyper concentration to be reversed. Thus, without the reaction being reversible, the setpoint would be perpetually breached and irreversible damage or death may result.
More on homeostasis can be found here: https://brainly.com/question/3888340
