Q. Concerning extracellular digestion what is meant by chemical digestion?
Chemical digestion is the series of enzymatic reactions to break macromolecules into smaller ones.
Q. Which kind of chemical reaction is the breaking of macromolecules into smaller ones that occurs in digestion? What are the enzymes that participate in this process called?
The reactions of the extracellular digestion are hydrolysis reactions that are breaking of molecules with the help of water, the enzymes that participate in digestion are hydrolytic enzymes.