Enzymes :
Enzymes are built of proteins folded into complicated shapes; they are present throughout the body.
The chemical reactions that keep us alive – our metabolism – rely on the work that enzymes carry out.
Enzymes speed up (catalyze) chemical reactions; in some cases, enzymes can make a chemical reaction millions of times faster than it would have been without it.
A substrate binds to the active site of an enzyme and is converted into products. Once the products leave the active site, the enzyme is ready to attach to a new substrate and repeat the process.
What enzymes does :
The digestive system – enzymes help the body break down larger complex molecules into smaller molecules, such as glucose, so that the body can use them as fuel.
DNA replication – each cell in your body contains DNA. Each time a cell divides, that DNA needs to be copied. Enzymes help in this process by unwinding the DNA coils and copying the information.
Liver enzymes – the liver breaks down toxins in the body. To do this, it uses a range of enzymes.