SAT Subject Biology Practice Question 410: Answer and Explanation

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Question: 410

20. Because some fruits contain enzymes that act as proteases, various fruit extracts were tested for use as possible meat tenderizers. The extracts were tested over a range of pH values. Below is a graph of relative effectiveness (compared to distilled water) vs. pH.

Which fruit extract operates over the broadest pH range?

A. Lemon
B. Pineapple
C. Papaya
D. Apple
E. Banana

Correct Answer: B


B Pineapple appears to have some effectiveness from pH 2 up to pH 12. None of the other fruit extracts operate over such a wide range.

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