BI-1288
Lock-and-key model
Biology · Secondary 4 · Medium · Lock-and-key model
Biological washing powders contain enzymes that digest food stains. A shirt stained with oil is washed with such a powder at 30°C. Which statement best explains how the enzymes help remove the stain?
- They permanently increase the temperature of the water.
- They lower the activation energy needed to break down the oil.
- They supply extra energy so the reaction releases more heat.
- They are used up to form new oil molecules.
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