BBC Revison Digestive enzymes
Short revision clip Digestive enzymes
Core Practical Potato Chips
The classic potato chips experiment. Add cubes of potato, of very similar dry mass and size, to glucose solutions of different concentration. Leave for some time, remove and dry. Measure the change in mass.
BBC Bitesize Top 20 Science Demos
Enzymes & temperature
Explanation why a watermelon crop is affected by temperature
Practical Enzyme rate vs substrate concentration
A visual demonstration of the impact of substrate concentration on enzyme activity. Rates are demonstrated using different concentrations of hydrogen peroxide added to yeast and soap.
Practical pH and enzyme activity
Using yeast kept in different pH buffers, another very visual demonstration of the effect of pH on enzyme activity.
Practical Temperature and enzyme activity
Again, another visual demonstration of the effect of temperature (using a number of water baths) on enzyme activity