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Practice problem

Enzyme Reaction Rates: pH — Effects & Examples

By Hannah Bonville
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The rate of reaction of Enzyme X at varying pH is shown in the graph below.

The rate of reaction with enzyme X increases from pH of about 2.5 until about 7. Then, it begins to decrease until it reaches 10.5.

Image source: By domdomegg (Own work) CC BY 4.0, via Wikimedia Commons

The pH of saliva is 6.5 to 7.5. The pH of the lower stomach is 1.5 to 4.0. The pH of the small intestine is 4.0 to 7.0. The pH of the large intestine is 4.0 to 7.0.

According to the table of pH values above, where in the body is Enzyme X likely to function best?

Choose one answer

Type a concept, like “slope” or “photosynthesis”.

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