Khan Academy
Khan Academy: Test Prep: Mcat: Biomolecules: Enzyme Structure and Function
Enzymes create the conditions needed for biochemical reactions to happen fast. The general name that chemists use for a chemical entity that increases the speed of a reaction is a "catalyst." Enzymes are biological catalysts - they...
CK-12 Foundation
Ck 12: Biology: Enzyme Function
[Free Registration/Login may be required to access all resource tools.] Describes how enzymes speed up biochemical reactions.
CK-12 Foundation
Ck 12: Physical Science: Catalysts
[Free Registration/Login may be required to access all resource tools.] How catalysts work and their role in living things.