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Enzymes | Biology ALevel | OCR, AQA, Edexcel
19/01/2023
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EXAMPLES OF ENZYMES... CATALASE-breaks down hydrogen peroxide into water and oxygen AMYLASE-Secreted from the salivery glands and pancreas to break down starch TRYPSIN-Secreted from the pancreas to break down proteins rate of reaction. rate of reaction temp (°C) rate of reaction PH. FACTORS AFFECTING ENZYME ACTIVITY- -increasing temp -optimum temperature increases reaction rate TEMPERATURE PH Optimum PH Substrate concentration - a high temp will denature the enzyme, changing the shape of the active site. -as enzyme concentration increases the rate of a reaction C positive correlation) ENZYME CONCENTRATION MAMAUNAWAA ALAALAAAAAAAAALLIMAJALAJJATS ENZYMES € enzyme SUBSTRATE CONCENTRATION PANTALLARGATAAMAALAAALAALA MALAYALAMUALAAAAAABA reaction to enzyme concentration -as substrate point of concentration increases, reaction rate increases Saturation Call enzymes occapiea) until all active sites are occupied. enzymes are biological catalysts that speed up a chemical reaction that remain unchanged The induced fit model & by the end of the reaction.... Lock&Key model demonstrates enzyme-substrate complex's. Substrate 20 -active Site ENERGY -pH also increases the rate of enzyme activity in a reaction. -if the area is too acidic or too alkaline, this will slow the rate of the enzyme on the reaction - the lock and key model represents how each substrate is ¡Ea REACTION 園 Substrate binds to active site -reaction without an enzyme -reaction with an enzyme ENZYMES LOWER THE ACTIVATION ENERGY OF A REACTION! LOCK&KEY MODEL- € enzyme-product complex € Specific to only one enzyme. - this specifity is due to the active site having a complementary Shape to the substrate, its tertiary.structure.
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