Extra information - example of enzymes and their action
- substrate(s)
product(s)
Carbohydrases (enzymes acting on carbohydrates)
- starch (+ water)
maltose
- maltose (+ water)
glucose + glucose
- sucrose (+ water)
glucose + fructose
Proteases (enzymes acting on proteins)
- proteins (+ water)
polypeptides
- liquid milk proteins (+ water)
coagulated milk solids
Lipases (enzymes acting on lipids)
-
fats/oils (+ water)
fatty acids + glycerol
Other (non-digestive) enzymes
- hydrogen peroxide
water + oxygen
Measuring rate of reaction of enzyme-controlled reactions
This may be achieved by directly measuring
- appearance of product over time
- disappearance of substrate over time.
From these measurements rate of reaction may be directly calculated.
Alternatively, using the time T taken for the reaction to reach a certain stage:
Rate of reaction 
( rate is inversely proportional to T)
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