L9 Enzymes
Week W5
Main
Called Protein catalysts
used to speed up the rate of reaction without being used up
Chemical change occurs when the bonds of the reactants break and
new bonds form to make the product
Molecules must collide with enough force and with the correct orientation
for bond breaking to occur
All reactions require activation energy
heat usually provides the activation energy
however, an increase in temperature can cause proteins to denature
and cells die
Enzyme catalysts allow the reaction to work at a good rate without an
excessive increase in temperature
Exer/Endergonic Reactions
L9 Enzymes 1
, red line is the temp with the enzyme catalyst; blue is what the temp would
be without
Enzymes decrease the activation energy by stretching and bending the
chemical bonds that normally break in the reaction
Induced Fit Model for Enzymes
Enzymes will fit but not perfectly
L9 Enzymes 2
Week W5
Main
Called Protein catalysts
used to speed up the rate of reaction without being used up
Chemical change occurs when the bonds of the reactants break and
new bonds form to make the product
Molecules must collide with enough force and with the correct orientation
for bond breaking to occur
All reactions require activation energy
heat usually provides the activation energy
however, an increase in temperature can cause proteins to denature
and cells die
Enzyme catalysts allow the reaction to work at a good rate without an
excessive increase in temperature
Exer/Endergonic Reactions
L9 Enzymes 1
, red line is the temp with the enzyme catalyst; blue is what the temp would
be without
Enzymes decrease the activation energy by stretching and bending the
chemical bonds that normally break in the reaction
Induced Fit Model for Enzymes
Enzymes will fit but not perfectly
L9 Enzymes 2
