BIOCHEMISTRY Enzymes Terms Catalyst Speeds up chemical reactions

BIOCHEMISTRY Enzymes

Terms Catalyst- Speeds up chemical reactions Protein- a chain of amino acids (polypeptide) Organic compound- a macromolecule that contains Carbon and Hydrogen bonded together

Structure of enzymes Chain of amino acids 3 dimensional Each enzyme has a special shape determined by the arrangement of amino acids *** SHAPE DETERMINES THE FUNCTION

How enzymes work 1. Fit into specific substances 2. Holds substances together 3. Chemical reaction takes place 4. lets go of the substance(s) 5. Products are formed

Visual representation ( Take 3 colors)

Characteristic of enzymes Specific- Fit only specific reactants. Ex: enzyme A works on substance X but not substance Y Reusable- Not used up during reaction Ex: Enzyme A works on substance X, lets go, and finds another substance X to work on Need a small amount- Enzymes work fast!

Reversible- Used to synthesize and used to hydrolyze Not part of the reaction- Only hold reactants in place

Lock and key model Keys work on specific locks- Enzymes are specific because of their shape Keys lock- enzymes form bonds Keys unlock- enzymes break bonds Keys are reusable- enzymes are reusable

Naming enzymes ASE- Most likely an enzyme Root word= Indicates the substrate worked on

Important enzyme vocabulary a substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction. Substrate: the substance on which an enzyme acts. Active site: a region on an enzyme that binds to the substrate during a reaction. Enzyme-substrate complex: The association between enzyme and substrate is thought to form a close physical association between the molecules and is called the enzymesubstrate complex.

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DO NOW Take out your HW- Prelab packet Answer the following questions: Another name for an enzyme is _________ Why are enzymes important? What is a substrate? Explain how enzymes work on substrates. Quiz on proteins and enzymes on Thursday