Enzymes Necessary Proteins Catalysts Catalysts are proteins Speed

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Enzymes Necessary Proteins

Enzymes Necessary Proteins

Catalysts • Catalysts are proteins • Speed up chemical reactions • Necessary for synthesis

Catalysts • Catalysts are proteins • Speed up chemical reactions • Necessary for synthesis & digestion reactions Enzymes are biological catalysts.

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Enzymes • Specificity – Enzyme shape matches substrate shape – Enzymes can be reused

Enzymes • Specificity – Enzyme shape matches substrate shape – Enzymes can be reused • Enzymes and substrates bind at the active site Enzyme

Enzymes are like…

Enzymes are like…

Enzymes & Chemical Reactions • Enzyme names end in -ase. – sucrase (enzyme) –

Enzymes & Chemical Reactions • Enzyme names end in -ase. – sucrase (enzyme) – sucrose (substrate) • Enzymes are not changed by the reaction. • Substrates are changed – digested – synthesized

Examples of Enzymes Active site substrate

Examples of Enzymes Active site substrate

Examples of enzymes substrate digestion reaction active site enzyme unchanged

Examples of enzymes substrate digestion reaction active site enzyme unchanged

Enzymes in action • Catalyze synthesis and digestion reactions • Lewport Biology Place animation

Enzymes in action • Catalyze synthesis and digestion reactions • Lewport Biology Place animation

Environmental Effects on Enzymes • Temperature • p. H – p. H of 1

Environmental Effects on Enzymes • Temperature • p. H – p. H of 1 -6 is an acid – p. H of 7 is neutral – p. H of 8 -14 is a base – Enzymes work best at an optimum temp & p. H

Temperature Above the optimum temperature the enzyme denatures (changes shape). Activity 5. 5 on

Temperature Above the optimum temperature the enzyme denatures (changes shape). Activity 5. 5 on Pearson. Successnet

Comparison of Enzymes

Comparison of Enzymes

p. H

p. H

Enzyme & Substrate S concentration E S S S E E

Enzyme & Substrate S concentration E S S S E E

Enzyme & substrate concentration E S S S E E

Enzyme & substrate concentration E S S S E E

Enzyme & substrate concentration

Enzyme & substrate concentration