BI-1404
Effect of temperature and pH on enzymes
Biology · Secondary 4 · Hard · Effect of temperature and pH on enzymes
Two enzymes, X and Y, both digest starch. Their activities at different pH values are shown:
- Enzyme X has maximum activity at pH 2.
- Enzyme Y has maximum activity at pH 8.
Which statement best explains which enzyme is more likely to be found in the human small intestine?
- Enzyme X has maximum activity at pH 2.
- Enzyme Y has maximum activity at pH 8.
Which statement best explains which enzyme is more likely to be found in the human small intestine?
- Enzyme X, because the small intestine is strongly acidic like pH 2.
- Enzyme X, because enzymes with low optimum pH work faster at all pH values.
- Enzyme Y, because the small intestine contents are alkaline, close to pH 8.
- Enzyme Y, because enzymes cannot function at pH 2 at all.
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