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Enzymes * Flashcards

-How enzymes lower the Ea barrier
-Substrate specificity of enzymes
-An enzyme's acitivity can be affected by...
-Effects of temperature and Ph
-Regulation of enzyme activity helps control metabolism
-Specific localization of enzymes within the cell

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997515916How do enzymes catalyze reactions?by lowering the activation energy required for the reaction to occur0
997515917True or False: Enzymes start chemical reactions.FALSE. Enzymes don't start reactions- they SPEED UP reactions that would occur eventually.1
997515918Enzyme substrateThe reactant that an enzyme acts on2
997515919The enzyme binds to its substrate, forming what?Enzyme-substrate complex3
997515920What is the active site?The active site is the region on the enzyme where the substrate binds.4
997515921True or false: Enzymes fit with any shape of molecules.FALSE. Each substrate/reactant has a unique shape. The have a specific substrate the work on5
997515929An enzyme's activity can be affected by what three factors?Temperature, pH and Concentration of the Substrate6
997515931Each enzyme has an optimal _________ and _________ in which it can function.Temperature / pH7
997515932Some enzymes reside in specific organelles, such as...Enzymes for cellular respiration are located in mitochondria8
997515933The names of enzymes mostly end in" ASE" Protease Exception: Pepsin9
997515934Amylase enzyme works on what substrate?Starch in the human mouth10
997515935Lactase works on what substrate?Lactose in the human small intestine11
997515936Pepsin works on what substrate?Protein in the human stomach12
997515937Catalse works on what substrate?Blood and human cells creating H2O2 Hydrogen Peroxide13
997515938LysomsomesContain enzymes that digest waste and damaged organelles so the cell can dispose of them14
997515939Activation EnergyThe energy required to initiate a reaction.15
997515941Optimal Enzyme Temperature GraphThe temperature at which each enzyme specifically works at. In this graph it is 37 degrees C or 98.6 degrees F.16
997515942Denature (verb)destroy the characteristic properties of (a protein or other biological macromolecule) by heat, acidity, or other effects that disrupt its molecular conformation.17
997515944Lock and Key ModelEnzymes are specific. The only wok on the substrate that they "fit." Just like a lock has a specific key to open it.18

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