Homeostasis of Enzymes What is an enzyme? How do enzymes work? What factors can effect enzyme action?

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Homeostasis of Enzymes

Homeostasis of EnzymesWhat is an enzyme?How do enzymes work?What factors can effect enzyme action?Enzyme--An enzyme is a biological catalyst (They speed the rate of chemical reactions)--Increase the rate of reaction by lowering the amount of activation energy--They are responsible for thousands and thousands of chemical processes that sustain life--Enzymes are proteins in nature and structureEnzyme ActionEnzymes act by converting starting molecules (substrates) into different molecules (products)

Almost all chemical reactions in a biological cell need enzymes in order to occur at rates sufficient for life

If it doesnt happen fast enough, cell death could resultOrganizationRemember:If cells die, tissues are compromised

If tissues are compromised, organs can fail

If organs fail, systems wont function

If systems wont function, Humans can dieFactors affecting the rate of enzyme activity Optimum is a useful word which means "the best

We call the temperature or pH which makes an enzyme work at its very fastest the optimum for that enzyme

The rate of enzyme activity increases with as temperature increases until the optimum temperature, then falls to zero as the enzyme is denatured

Denatured.. This means that the protein changes shape and the active site is no longer complementary to the substrate moleculeGraphing the action of enzymes

Enzyme: CatalaseIn your body, the enzyme catalase is very important. I helps to convert Hydrogen Peroxide to Oxygen and Water

Take a look at the following graph:

In the graph, the rate of catalase activity isdirectly related to the percent increase in OxygenWhat can you can conclude from the graph?

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