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Catalysts

speed up the rate of the reaction.

lowers the energy input required for achemical reaction to happen

remains unchanged at the end of thereaction

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Enzymes

Enzymes are Biological catalysts

Enzymes control chemical reactionsthat take place in the cytoplasm.http://programs.northlandcollege.edu/biology/Biology1111/animations/enz

yme.html

Catalase in an example of an enzymemade by living cells

http://programs.northlandcollege.edu/biology/Biology1111/animations/enzyme.htmlhttp://programs.northlandcollege.edu/biology/Biology1111/animations/enzyme.htmlhttp://programs.northlandcollege.edu/biology/Biology1111/animations/enzyme.htmlhttp://programs.northlandcollege.edu/biology/Biology1111/animations/enzyme.html

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Catalase

The enzyme catalase breaks downthe waste substance hydrogenperoxide into water and oxygen.

Hydrogen peroxide oxygen +water

(enzyme)

catalase

(substrate) (products)

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Degradation reactions

animation

http://www.lewport.wnyric.org/jwanamaker/animations/Enzyme%20activity.htmlhttp://www.lewport.wnyric.org/jwanamaker/animations/Enzyme%20activity.html

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Synthesis Reaction

Active site

es

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Degradation reactions

Starch

Maltose

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Enzyme activity

Temperature and pH affect the activity

of an enzyme.

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Optimum Condition

Enzymes function best or are most activein specific conditions known as optimum

conditions.

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Degradation reaction

Substrate Enzyme Product Memory

Hydrogenperoxide

Catalase Oxygen andwater

HPCOW

Starch Amylase Maltose

Maltose Maltase Glucose

Protein Pepsin Peptides

Peptides Protease Amino acids

Fats Lipase Fatty Acidsand Glycerol

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Synthesis reaction

Glucose-1-phosphate

Starch

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Properties of enzymes

Made of protein.

Speed up reactions.

Are specific.Not used up during the reaction.Require optimum conditions at which

they work best.At high temperature they becomedenatured

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Lock and Key

http://www.lewport.wnyric.org/jwanamaker/

animations/Enzyme%20activity.html

http://www.lewport.wnyric.org/jwanamaker/animations/Enzyme%20activity.htmlhttp://www.lewport.wnyric.org/jwanamaker/animations/Enzyme%20activity.htmlhttp://www.lewport.wnyric.org/jwanamaker/animations/Enzyme%20activity.htmlhttp://www.lewport.wnyric.org/jwanamaker/animations/Enzyme%20activity.html

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Glucose-1-phosphate Starch

Synthesis reactions

(Substrate) (enzyme) (product)

phosphorylase

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