Biology Warm Up (modified 9/16)

1
Biology Warm Up (modified 9/16)
During class today, we will be completing part A
(and part b through the beginning of step 7)
Effect of Temperature on Enzyme Activity
p54 For your warm up, Read part A of the lab
procedure. DO NOT WRITE THE PROCEDURE DOWN
YET.Make a labeled diagram of each step of part
A.Put the book away.Use your diagram to write
out the steps of the procedure, Construct a
materials list, andCreate an empty table in
which to record your data.
Remember to substitute potato, everywhere the
book says, liver.
2
Biology Warm Up (modified 9/16)
Effect of Temperature on Enzyme Activity p54 For
your warm up, Read part A of the lab procedure.
DO NOT WRITE THE PROCEDURE DOWN YET.Make a
labeled diagram of each step of part A.Put the
book away. Use your diagram to write out the
steps of the procedure, Construct a materials
list, andCreate an empty table in which to
record your data.
Remember to substitute potato, everywhere the
book says, liver.
3
2.4 Chemical Reaction and Enzymes
Chemical Reactionone set of chemicals changes
into another set of chemicals. changes in
chemical bonds Reactantsenter into
reaction Productsare produced
4
2.4 Chemical Reaction and Enzymes
2H2 O2 Reactants
2H2O Product
5
2.4 Chemical Reaction and Enzymes
Chemical Reaction Can be slow Iron oxidizing
(rust) Can be fast Hydrogen and Oxygen exploding
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Energy
ExothermicEnergy is released
EndothermicEnergy is absorbed
Energy
7
Activation Energy
Energy required to get a reaction started
8
Activation Energy
Energy required to get a reaction started
CatalystsSpeed a reaction by lowering activation
energy
Enzymes Proteins that serve as catalysts in
biologicalsystems
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Enzyme Action
Enzymes provide a site for reactants to be
brought together Temperature and pH can affect
the shape of enzymes and reduce their
effectiveness Enzyme Animation