Enzymes and Temperature: Lab work

Our biology teacher told us to do an experiment the task is in her blog.


a- Why did you leave the potato and the test tube in the water baths before the experiment?

b- State:   – the independent variable

The temperature.

– the dependent variable

The height of the foam produced.

– two fixed variables

c- Describe the results shown in the graph.


d- At what temperature the enzyme works best?

At 30ºC.

e- What has happened at 100°C?

There is no foam. There is no activity because at high temperatures the active site loses its shape, therefore the substrate doesn’t fit into the enzyme. The enzyme is denatured.

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