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25 Cards in this Set

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