IGCSE BIOLOGY CHAPTER 5
ENZYMES
💡 DEFINITION: Enzymes are Biological Catalysts that are made up of
Proteins that control Metabolic Reactions
Biological Catalyst: Speed up rate of reaction in living organisms, without being
chemically involved
Metabolism: Chemical reactions that occur within living organisms
Graph showing the amount of energy used when an enzyme is catalysed and uncatalysed
Metabolic Reactions: Controlled by Enzymes
Respiration- Mitochondria
Photosynthesis- Chloroplasts
Digestion- Alimentary Canal
Protein synthesis- Ribosomes
Cell Growth- Whole organism
Cell Division
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