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17 Cards in this Set
- Front
- Back
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What is a chemical reaction?
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When chemical energy is converted.
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Exergonic
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Release energy
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Endergonic
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Require energy
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What is activation energy?
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A small amount of energy which usually comes in the form of heat.
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What are catalysts?
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Chemical compounds that lower the activation energy to make it easier for the reaction to occur.
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What are enzymes?
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They are proteins that act as biological catalysts. They can speed up or slow down reactions. They allow necessary reactions to take place at ordinary temperatures.
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What is the lock and key model?
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The key is the substrate or reactant which binds tightly to the enzyme or lock.
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What is the place called where the binding takes place?
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Active site.
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When the enzyme changes shape after binding occurs, what is this called?
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Induced fit.
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What is a cofactor?
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A helper that is inorganic that helps the enzyme to function.
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What is a coenzyme?
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A helper molecule that is an organic molecule.
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What are competitive inhibitors?
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Molecules that mimic the enzyme shape and block the active site
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What are noncompetitive inhibitors?
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Molecules that change the shape of the active site without actually entering it.
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What are allosteric sites?
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Sites other than the active site that are involved in enzymatic activity.
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What is the most common mode of enzyme regulation?
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Feedback inhibition.
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What are allosteric activators?
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Molecules that stimulate enzyme function
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What are allosteric inhibitors?
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Moles that inhibit enzyme functions
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