Enzymes and Activation Energy
*start chemical reacion, weakening chemical bonds in the reactant molecule is necessary
- molecule need to asorb energy
- ex) burn a candle, need initial energy with math
- Activation energy-'start up' energy
- activate reaction and triggers a chemical reaction
* provide energy - heat up the mixture of molecules
- hotter may collide with enough energy to weaken bonds
-disadvantages: reaction the may destroy cell's dedictate structure
- Catalysts: an asistance that cellualar reacions depend on
- Enzymes: speicalized protein that is the main catalysts of chemical reaction in organism
. provide away fo reactions to occur at the cell's normal temp.
- no supply activation energy
- lovers energy requirment barrier so reaction can proceed requiremal cell temp.
How Enzymes work
How does each enzyme catalyze only for one type of reaction?
=Reason: sape of each enzyme fits the shape of particular reactant molecule
- substrate: a specific reactant acted upon by an enzyme
- active site: substrate fits into particular region of the enzyme
* Not rigid fit etween substrate and enzyme
- substrate enter- active site ahnge shape slightly- place functional groups
* Another way of lovering activaion energy = accepting two reactant molecule into adjavent sites
- holding reactants together enables them to react more easily
- ensyme can catalyze formation of larger molecules from smaller molecule
A structrure &shpe are essential to function
- sensitive to change in surrounding environment - temp., pH
- only survive and function within certain range of conditions
*start chemical reacion, weakening chemical bonds in the reactant molecule is necessary
- molecule need to asorb energy
- ex) burn a candle, need initial energy with math
- Activation energy-'start up' energy
- activate reaction and triggers a chemical reaction
* provide energy - heat up the mixture of molecules
- hotter may collide with enough energy to weaken bonds
-disadvantages: reaction the may destroy cell's dedictate structure
- Catalysts: an asistance that cellualar reacions depend on
- Enzymes: speicalized protein that is the main catalysts of chemical reaction in organism
. provide away fo reactions to occur at the cell's normal temp.
- no supply activation energy
- lovers energy requirment barrier so reaction can proceed requiremal cell temp.
How Enzymes work
How does each enzyme catalyze only for one type of reaction?
=Reason: sape of each enzyme fits the shape of particular reactant molecule
- substrate: a specific reactant acted upon by an enzyme
- active site: substrate fits into particular region of the enzyme
* Not rigid fit etween substrate and enzyme
- substrate enter- active site ahnge shape slightly- place functional groups
* Another way of lovering activaion energy = accepting two reactant molecule into adjavent sites
- holding reactants together enables them to react more easily
- ensyme can catalyze formation of larger molecules from smaller molecule
A structrure &shpe are essential to function
- sensitive to change in surrounding environment - temp., pH
- only survive and function within certain range of conditions
Concept Check
1. Explain the role of activation energy in a reaction. How does an enxyme affect activation energy?
2. Describe how a substrate interacts with an enzyme.
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