If for biological catalysts to be able to work, cells secrete acids and bases to maintain proper pH, then for biological catalysts to maintain proper pH, what is needed to maintain proper pH?

Answer choices:
- 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  