Answer:
biological catalysts present
Step-by-step explanation:
Biological catalysts are substances that can accelerate a chemical or biological reaction without being permanently altered, that is, without being consumed during the reaction. These substances are essential for the chemical activities that take place within the cells.
Biological catalysts produced by cells are known as enzymes. They are highly specific and are used to transform nutrients into substances that can be used by cells. Enzymes are considered the main biological catalysts, generally being proteins. Some examples of enzymes are amylase, lipase, dehydrogenase, among others.