Enzymes
Proteins that
catalyse chemical
reactions in living
organisms
A molecule that
helps a reaction
but is not
consumed itself
•Protein, made of Amino Acids
•Specific, each enzyme helps in 1 reaction
•Increase the speed of chemical reaction
•Unchanged at the end of the reaction
•They work at a specific optimal temperature and acidity
•They can be destroyed by high temperatures
•Names usually end with –ase: Amylase, Peptidase, Lipase
•To make reactions happen that would usually
not happen
Enzyme and
substrate fit like
Lock and Key
•It starts in your
mouth
•Your saliva
contains
Amylase
•It digests
(breaks down)
Starch
•Amylase breaks
Starch down
into Maltose
Important Enzymes
Part of
Body
Name of
Enzyme
Optimal
Temp/pH
Reaction it Catalyzes
Mouth
Amylase
37/neutral
Starch
->
Maltose
Stomach
Pepsin
37/ pH2
Protein
->
Poly peptides
Produced in
Pancreas
active and
Duodenum(
part of
small
intestine)
Pancreatic 37/Neutral
Amylase
Starch
->
Maltose
Maltase
Maltose
->
Glucose
37/Neutral
Peptidases 37/Neutral
Poly peptides ->
Amino Acids
Lipase
Fats (Lipids)
Fatty acids & Glycerol
37/Neutral
->