Answer:
In the case of catalase, the optimum pH is approximately pH 7.0. That is, catalase works best at a neutral pH. If the solution is too acidic (low pH value) or too basic (high pH value) the catalase is inactive and no longer functions as an enzyme.
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Explanation:
C
because it is. because it is. 1 +2 = 3 right and c is the 3rd letter in the alphabet so it is c