EnzymesPP 35-37, 57

Energy: the ability to do work Requires energy to start the reaction (activation energy,

Ea)

Chem Rxns Review

End in –ase (i.e. synthase, polymerase, helicase)

Reduces the activation energy (Ea)Protein catalyst

•Each enzyme specific to a chemical rxn•Helps assemble the product OR

disassemble the reactants•Changes shape when attached to the

substrate (reactants)•Not used up in the rxn, can be used

over and over

Every reaction has reactants that yield products

Reactants ProductsPotatoes contain an enzyme called

catalase which can break down hydrogen peroxide

2H2O2 2H2O + O2How do you know it was working?

SUMMING UP YOUR OBSERVATIONSTemp increase

activity only to a certain point

Call this optimal temp

Temp changes the shape of the protein (enzyme)

SUMMING UP YOUR OBSERVATIONS

Enzymes have a specific pH they can work within

Too low or too high and activity slows or even stops

ConcentrationMore enzyme more work and more productPoint of saturation: enzymes can only work so fast even if you

add more substrate Max out on activity