enzymes

• Cofactor = a non-protein ‘helper’ component that helps enzymes carry out their function as biological catalysts
• Coenzyme= organic cofactor
• Prosthetic groups= cofactors that form a permanent feature of the protein
• Intracellular enzymes= enzymes that act within cells
• Extracellular enzymes = enzymes that are released from cells to break down larger nutrient molecules into smaller molecules so they can enter cells