Session Two (1.4.2): Factors that Affect Enzyme Action
Introduction
Enzymes usually act very quickly, but there are some factors that can affect their speed. Some enzymes are affected by temperature and pH. Each enzyme has a temperature and pH at which it works best.
Reading
Read through and make notes on pages 43-46 of your coursebook.
Note that the experiments covered in these pages are very popular in exam questions, so you should pay attention to the methods and techniques used.
Links
Now work through the following resources:
WATCH – Investigation of the action of lipase (YouTube) Links to an external site.
WATCH – Enzyme Experiments: Factors that Affect Enzyme Activity (YouTube) Links to an external site.
Experiment
Remember to review the Safety Guide. Download Safety Guide.
PRACTICAL - How Enzyme Action Can be Affected Download PRACTICAL - How Enzyme Action Can be Affected
Activity
Answer the questions on pages 43 to 46.
Update your flash cards with the key words on pages 43-46.
Review
Complete the Questions on Factors that Affect Enzymes on pages 43-46. Check your answers.