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Cell Metabolism


What is Cell Metabolism? the sum of All Chemical Reactions in a cell
What determines Reation Direction/Law of Mass Action? INCREASES in Reactant --> INCREASES in Product formation
What are some of the determinants of Reaction Rates? 1. Chemical Concentrations of Reactants; 2. Temperature; 3. Activation Energy; 4. Catalysts
How does Heat determine Reaction Rates? 1. provides high impact collisions need to impart Activation Energy
What is Activation Energy? Kinetic Enregy NECESSARY to start a Chemical Reaction
What is the function of Catalysts? SPEEDS up Reaction, but is not consumed
Whata re Enzymes? metabolic Catalysts
What are the functions of Enzymes? 1. SPEED Reactions w/o being altered themselves; 2. DON"T CAUSE Reactions that would otherwise occur
What is a Substrate? Reactant: any Organic Molecule BOUND To or ACTED on by an Enzyme
What is an Enzyme? 3-Dimensional Protein Catalyst
What is an ES-Complex? Substrate ADSORBED onto the surface of Enzyme, forming TEMPORARY Chemical Association
What is Geometric Specificity? one Enzyme reacts with only Specific Substrates
What is an Active Site? area of an Enzyme molecule that fits the Geometric Configuration of a Specific Substrate
What is the basic scheme of Metabolic Reactions? Enzyme + Substrate --> <-- ES-Complex --> <-- Products + Enzyme
What is the fuction of Enzyme Action? LOWERS Activation Energy requirements
How does Enzyme Action LOWER Activation Energy? 1. WEAKENS/distorts existing bonds within a substrate or changes its shape; 2. promtes new bonds by properly ORIENTING 2 Substrates
Created by: Kristel