12. the bubbling that you observed indicated the production of what gas as a result of the enzymatic
reaction?

As a result of enzymatic reaction  bubbles of oxygen gas are produced in the form of foam

Explanation:

 Living Cells produced an enzyme called catalase. The enzyme catalase breakdown hydrogen peroxide. This is well understood by an equation

                                 2 H2O2     catalase  2 H2O +  O2+  

In a solution the enzyme catalase activity can be measured by the production of Oxygen gas bubbles out in the form of foam. When H2O2 added in a catalase solution  and leave it for  certain time period,the foam height rises in the test tube,it can be measured. The greater the foam height the enzyme catalase activity will also be greater.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products

can you make it bigger i can't see it