Protein type
Globular, metabolic function
Protein shape
Order of amino acids determines its shape and therefore function
Lock + key theory
Each enzyme has a different shape, within this shape there is an active site (held in shape with chemical bonds) and only one type of substrate fits into the active site
E + S, ESC, EPC, E + P
Enzyme and substrate, enzyme-substrate complex, Enzyme-product complex, enzyme + product
Anabolic
Building up molecules - protein synthesis
Catabolic
Breaking down molecules - digestion
Activation energy
Amount of energy needed to start a reaction
Where do enzymes work
Extracellular, Intracellular in the solution + intracellular membrane bound
Extracellular
Secreted from cells and catalyse extracellular reactions - salivary amylase is made in salivary glands but secreted down the salivary ducts to the mouth
Intracellular in the solution
Act in solutions in cells - enzymes catalyse the breakdown of glucose in glycolysis in cytoplasm, enzymes in the stroma that synthesise glucose
Intracellular membrane bound
On the cristae of mitochrondria and the grana of chloroplasts (transfer of electrons and hydrogen bonds in ATP formation)