Answer:
increasing the activation energy of a reaction
Step-by-step explanation:
In biological systems, enzymes speed up the rate of all of the chemical reactions that take place within cells which is vital for life and helps to perform various functions in the body, such as helping in digestion and metabolism.
Enzymes help cells to communicate with each other which enables cell growth and keeps life and death under control.
Enzymes work in biological systems by increasing the activation energy of a reaction