Enzymes.

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Presentation transcript:

Enzymes

Enzymes

What Are Enzymes? Many large proteins are enzymes Act as Catalyst to accelerates (speed up) a reaction

Enzymes Are specific for what they will catalyze End in –ase -Sucrase Only fit/work with one substance End in –ase -Sucrase -Lactase -Maltase Are Reusable

How do enzymes Work? Enzymes work by weakening bonds which lowers activation energy The minimum amount of energy needed to start a reaction

Enzymes Without Enzyme With Enzyme Free Energy Progress of the reaction Reactants Products Free energy of activation

Enzymes are like Escalators (lower energy requirements)

Substrate The substance (reactant) an enzyme acts on is the substrate Ex: sucrose is the substrate for sucrase Enzyme Joins Substrate

Active Site The Active site is a region of an enzyme where the substrate binds. Active Site Enzyme Substrate

Induced Fit A change in the shape of an enzyme’s active site It is induced (caused) by the substrate

Things that change enzyme effectiveness Temperature high temps may denature the enzyme. Changes its shape and makes it nonfunctional pH most like pH between 6 - 8 pH (near neutral) Substrate and enzyme concentration High concentrations increase function Low concentrations decrease function

A video review to help you understand.. Enzymes