Fact 1: Cells secrete acids and bases to maintain the proper pH for enzymes to work.

Fact 2: Enzyme mechanisms Enzymes are biological catalysts.

Given the two facts above, answer the question "For biological catalysts to maintain proper pH, what is needed to maintain proper pH?" with the following options: 
- Fully cooking the oysters
 - raising their temperature
 - Organic compounds
 - Something made from fermented ricce
 - metabolic reaction
 - Chemical energy
 - Something coming from a gland
 - secretion of acids and bases


 

        secretion of acids and bases 