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25 Cards in this Set
- Front
- Back
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what does an enzyme have at which the reaction works fastest
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a specific temperature
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What does working at its specific temp. allow the enzyme to do?
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THE TMEP ALLOWS THE GREATEST # OF MOLECULAR COLLISIONS WITHOUT DENOATURNING THE ENZYME
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what is denaturation
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process of dewtroying an enzyme by changing its shape
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2 thing that iwll cuase an enzyme to becuasme denatured
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ph and temp
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what happen to enzyme in a warm temp? why?
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it tem is not optimal and ph is optimal then, it denatured
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range of optimal temp for most human enzymes
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35 to 40
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what will happen to an enzyme behavior in a low temp? why?
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molecules are slow and small # of enzyme substrate collisons so few reactions occur
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when shown in a graph what will the enzyme's optimal temp. be?
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it will be tmp that corresponds with highest reacitvity level
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how many times can an enzyme be used?
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an enzy e can be used over and over
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what does an enzyme need in order to perform a reaction?
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substrate
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what is one factor that enzyme rate depneds on
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type of enzyme
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what is a cofactor
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active sites contain additional substances
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do enzymes provide activation energy
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no they lower it
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what can some other molecules do to an enzyme
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they can inhibit it
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what does an inhibitor molecule do to an enzyme
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it change the acitve site sot that the substrate will no fit
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what is one factor that could inhibait an enzyme
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high substrate levels
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at high substrate levels what happens to enzyme activity
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is reduced by the inhibitory effect
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whate the 2 theories that are about tyhe formation of an enzyme substrate complex
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the lock and key theory and the induced fit hypothesis
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which one of the 2 theories is our current model
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the induced fit hypotheses
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in what year was the lock and key theory developed?
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1895
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what is enzyme inhibition
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the process in which enzymes are stopped from working
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what 2 things cause enzyme inhibition
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other molecules called inhibitor molecules and high substrate levels too much
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what does an inhibitor molecule do
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it changes the shape of the enzyme's active site so that the substrate is unable to bing with it for a reaction
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what do organisms live at the expense of?
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FREE ENERGY
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what is free energy
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the energy available to do work
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