Cells secrete acids and bases to maintain the proper pH for enzymes to work, and phosphatases are enzymes that remove phosphates from other enzymes. Given these facts, what is needed from cells for phosphatases to keep the proper pH among the following options:
- plasma
 - secretion of bases only
 - secretion of proteins
 - metabolic reaction
 - it helps plants in growing
 - Positive charges
 - Transfers energy
 - secretion of acids and bases


 

        secretion of acids and bases 