The effect of extreme ph on catalase function what are you looking for in your observations when you are looking for evidence of a reaction? does the plant tissue that we tested contain catalase? does the animal tissue that was tested contain catalase?

The answers are as follows:
1. YOU ARE LOOKING FOR OXYGEN BUBBLES AS EVIDENCE OF CHEMICAL REACTION.
Catalase is an enzyme which speed up the rate of decomposition of hydrogen peroxide to water and oxygen. So, in this reaction, which test for catalase activity, hydrogen and oxygen will be formed as products of the reaction. The oxygen gas formed will be in form of bubbles. Therefore when you observe bubbles in your test tube, that means that the reaction is taking place and the oxygen gas is been formed.

2. YES, THE PLANT TISSUE TESTED CONTAINS THE CATALASE ENZYME.
Catalase is an important enzyme in plant tissues. It is present in all plants that are exposed to oxygen. The catalase enzyme helps the plants to speed up the rate of decomposition of hydrogen peroxide that are produced in the plants as a result of metabolic reactions taking place in plants. 

3. YES, THE ANIMAL TISSUE THAT WAS TESTED CONTAINS THE CATALASE ENZYME.
Catalase is a very important enzyme that is found in the liver of all living organism. The liver always produce hydrogen peroxide as a result of its metabolic reactions. This hydrogen peroxide is very toxic to the liver cells and can destroy them completely if its concentration is high in the cells. The function of the catalase is to break down the hydrogen peroxide into water and oxygen immediately they are formed. Water and oxygen are not toxic to the cells. Thus, the catalase enzyme work to prevent the destruction of the liver cells in animals.