B4 - Enzymes

ENZYMES are proteins that SPEED UP CHEMICAL REACTIONS

Instructions for making enzymes are found in the cell's genes.

Enzymes are very specific:

• Chemical reactions usually involve things either being split apart or joined together.
• A substrate is a molecule that is changed in a reaction.
• Every enzyme molecule has an active site - the part where a substrate joins on to the enzyme.
• Enzymes are really picky - they usually speed up one rection. This is because for an enzyme to work a substrate has to be the correct…