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Question
The various fruit extracts were tested over a range of pH values for use as possible meat tenderizers. The graph above is of relative effectiveness (compared to distilled water) vs pH.
Over which pH range does pineapple extract operate at no less than 50% of its maximum effectiveness?
Over which pH range does pineapple extract operate at no less than 50% of its maximum effectiveness?
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Solution
The correct option is A pH 4 to pH 10
The maximum effectiveness of pineapple is approximately 10. 50% of that is 5. The pH range where pineapple extract operates at least 5 or better is pH 4 to pH 10. The change in pH may not only affect the shape of an enzyme but it may also change the shape or charge properties of the substrate so that either the substrate cannot bind to the active site or it cannot undergo catalysis. In general, the enzyme has an optimum pH. However, the optimum pH is not the same for each enzyme.
Therefore, the correct answer is option A.
The maximum effectiveness of pineapple is approximately 10. 50% of that is 5. The pH range where pineapple extract operates at least 5 or better is pH 4 to pH 10. The change in pH may not only affect the shape of an enzyme but it may also change the shape or charge properties of the substrate so that either the substrate cannot bind to the active site or it cannot undergo catalysis. In general, the enzyme has an optimum pH. However, the optimum pH is not the same for each enzyme.
Therefore, the correct answer is option A.
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