Enzymes
Chemical Reactions Process that changes one set of chemicals into another set Slow = iron & oxygen = Fast = fireworks RUST
Two Parts of Chemical Reactions ReactantsEnterLeftProductsExitRight
Two Types of Reactions Exothermic Releases heat Endothermic Absorbs heat
Activation Energy Energy needed to start a reaction Difference b/t reactant energy and required energy for reaction to happen Required energy at peak
Enzymes Biological catalyst (proteins) Catalyst – substance that speeds up a chemical reaction Why? Rxn is too slow Activation energy is too high
Enzymes Lower activation energy Ex. Amylase Amylase Breaks down starches into sugars
Enzyme starch
Enzyme Sugar
Enzymes Enzyme has an active site fits substrate (reactants) Specific action Build up Break down Substrate (Key) + enzyme (Lock) = Enzyme substrate complex Products are released Example
Lock & Key
Regulation of Enzyme Activity Temperature High temps = fast Low temps = slow pH Enzyme dependent Concentration of substrate Regulated by proteins Produce enzymes at when needed After the first bite of food Break down enzymes when not When all the food is digested
How acids effect enzymes Acid (vinegar) amylase Starch-iodine solution Acid (vinegar)
Amylase lesson water Starch-iodine solution amylase