Question

mini-quiz: ph and enzymes
what is the optimal ph for the enzyme shown below?
a. 9
b. 8
c. 7
d. 10
graph: rate of enzyme-catalyzed reaction at varying ph levels, x - axis: ph (5 - 10), y - axis: rate of reaction (slow to fast), curve peaks around ph 8
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Explanation:

The optimal pH of an enzyme is the pH at which the rate of the enzyme - catalyzed reaction is the highest. Looking at the graph "Rate of Enzyme - Catalyzed Reaction at Varying pH Levels", the peak of the curve (where the reaction rate is the fastest) occurs at a pH of 8. So we compare this with the given options. Option A is 9, Option B is 8, Option C is 7, and Option D is 10. The pH value corresponding to the highest reaction rate (the peak of the curve) is 8.

Answer:

B. 8