Catalase and Oxidase Tests on Unknown: what are the bubbles that you see in a positive (+) catalase reaction?

Catalase and Oxidase Tests on Unknown

What are the bubbles that you see in a positive (+) catalase reaction?
2) Bacteria capable of synthesizing the enzyme catalase hydrolyze into 
and gaseous oxygen.
3) The oxidase test is used to identify microorganisms containing the enzyme
 
4) Cytochrome oxidase transfers electrons from the electron transport chain to 

‘(the
final electron acceptor) and reduces it to w