Enzyme required practical

An enzyme is a biological catalyst 

Add iodine to a few spotting tiles

Put a test tube of starch and a test tube or amylase into a water bath at 25 degrees for 5 minutes

Add starch to the first spotting tile to make sure it goes blue black

Add amylase into the starch and place mixture back into the water bath

Start stopwatch whilst every 10 seconds adding a drop of the starch amylase mixture to a spotting tile

When a spotting tile remains orange stop the stopwatch and record the time

Repeat with the same ph and then a different ph