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Transcript
Catalysts
speed up the rate of the reaction.
lowers the energy input required for a chemical
reaction to happen
remains unchanged at the end of the reaction
When you think of a catalyst think of a fire!
Enzymes
 Enzymes are Biological catalysts

https://www.youtube.com/watch?v=XTUm-75-PL4
Enzymes control chemical reactions that
take place in the cytoplasm.
Catalase in an example of an enzyme made
by living cells
Catalase
 The enzyme catalase breaks down
the waste substance hydrogen
peroxide into water and oxygen.

H 2O 2
catalase
(substrate)
(enzyme)
oxygen
+water
(products)
Degradation reactions
animation
Synthesis Reaction
es
Active site
Degradation reactions
Starch
Maltose
Enzyme activity
Temperature and pH affect the activity
of an enzyme.
Optimum Condition

Enzymes function best or are most
active in specific conditions known as
optimum conditions.
Degradation reaction
Substrate
Enzyme
Product
Hydrogen
peroxide
Starch
Catalase
Amylase
Oxygen and
water
Maltose
Maltose
Maltase
Glucose
Protein
Pepsin
Peptides
Peptides
Protease Amino acids
Fats
Lipase
Fatty Acids
and Glycerol
Used
for:
Waste
product
Synthesis reaction
Glucose-1phosphate
Starch
Properties of enzymes
1. Speed up reactions.
2. Made of protein.
3. Are specific.
4. Not used up during the reaction.
5. Require optimum conditions at which
best.
they work
6. At high temperature they become denatured
(they break down)
Lock and Key

https://www.youtube.com/watch?v=myOR
DWVzNhc