BI-671
Digestive enzymes
Biology · Secondary 3 · Hard · Digestive enzymes
In an experiment, lipase is added to a beaker containing milk and a pH indicator that is purple at pH 8 and yellow at pH 6. After 15 minutes at 37 °C, the mixture turns yellow. Which statement best explains this colour change?
- Lipase converts fats into amino acids, raising the pH.
- Lipase converts fats into fatty acids, lowering the pH.
- Lipase converts fats into glucose, keeping the pH constant.
- Lipase is denatured, so the pH indicator changes colour by itself.
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