ssme-518 instructional technology and material development assignment2
DESCRIPTION
ENZYMES. SSME-518 Instructional Technology and Material Development Assignment2 Presented by: Harika Özge Kızılsu. Outline. Introduction to enzymes How enzyme work Activation energy Factors effecting enzyme activity Temperature pH Enzyme concentration - PowerPoint PPT PresentationTRANSCRIPT
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SSME-518SSME-518Instructional Technology and Material Instructional Technology and Material
DevelopmentDevelopment
Assignment2
Presented by: Harika Özge KızılsuPresented by: Harika Özge Kızılsu
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OutlineOutline
Introduction to enzymes
How enzyme work Activation energy
Factors effecting enzyme activity Temperature pH Enzyme concentration Substrate concentration
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Introduction to enzymesIntroduction to enzymes
• Enzymes are usually proteins
• Enzymes are catalysts
• In general, names end with suffix “ase”
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Introduction to enzymesIntroduction to enzymes
CatalystCatalyst Time for reactionTime for reaction
Yes 1 second
No 3 x 10 12 years
3 x 1012 years is 500 times the age of the earth!!!!
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Introduction to enzymesIntroduction to enzymes
Enzymes:
• increase the rate of a reaction
• not consumed by the reaction
• act repeatedly to increase the rate of reactions
• are often very “specific” for the substrate
Reactants also called “substrates” of enzyme
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How enzyme workHow enzyme work
• Enzymes physically interact with their substrates
• Substrates bind to the enzyme’s active site
• Enzyme reaction path:
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How enzyme workHow enzyme work
• Lock and Key Model
Substrate fits into an active site perfectly. (key)(key) (lock) (lock)
click to see animation of model
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• Activation energy is:
the energy required to start a reaction.
How enzyme workHow enzyme work
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Factors effecting enzyme activityFactors effecting enzyme activity
Temperature
pH
Enzyme concentration
Substrate concentration
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TemperatureTemperature
36
0 10 20 30 40 50 60 70
Temperature
Rat
e of
rea
ctio
n
C (optimum temperature)
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pHpH
0 1 2 3 4 5 6 7 8 9
pH
Rate
of r
eact
ion
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Enzyme concentrationEnzyme concentration
Enzyme concentration
Rate
of r
eact
ion
Substrate concentration constant
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Substrate concentrationSubstrate concentration
click to learn more
Substrate concentration
Rat
e o
f re
acti
on
Enzyme concentration constant
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Thank YOU Thank YOU
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ReferencesReferences
• http://fig.cox.miami.edu/~cmallery/255/255enz/enzymology.htm
• http://ntri.tamuk.edu/cell/enzyme2.html
• http://www.animationfactory.com/animations/buildings/doors/6038e/