Oxidases and oxygenases are two types of enzymes that function as biocatalysts. There are significant differences between the two. 

Oxidases

• Are enzymes that catalyze the transfer of hydrogen from a substrate to oxygen in oxidation-reduction reactions. 
•  resulting in the formation of water or hydrogen peroxide. 
• Are responsible for building ATP that acts as the cell’s energy storehouse

Ascorbic acid oxidase, monoamine oxidase, cytochrome oxidase are examples of oxidases. 

Oxygenases

• Are enzymes that catalyze the transfer of atomic oxygen from molecular oxygen (O2 ) to a substrate during the oxidation of a particular substrate. 
• Are responsible for breaking down iron that is distributed to various parts of the body

Carotenase, tryptophan pyrrolase, tyrosinase, and pheylalanine hydroxylase are examples of oxygenases.