2. o They are mainly proteins o They are biological catalysts that speed up the rate of the biochemical reaction

3.  The enzyme is like the lock, into which another molecules fits like the key  We say that the shape of the enzyme and the shape of the substrate are complete to one another

4.  Active site  Active site The active site refers to the specific region of an enzyme where a substrate binds and catalysis takes place or where chemical reaction occurs

5. Substrate Substrate A substrate is a molecule acted upon by an enzyme. A substrate is loaded into the active site of the enzyme, or the place that allows weak bonds to be formed between the two molecules

6. Products Products The chemicals formed after the completion of a reaction are termed as products. The final products are also called end products.

7.  All enzymes are proteins  Enzymes are made inactive by high temperature  Enzymes work best at a particular temperature  Enzymes work best at a particular ph  Enzymes are catalysts  Enzymes are specific

8. At low temperature, enzymes have low activty. At extreme temperatures, the enzymes are denatured