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Chapter 8: Metabolis

Intro to metabolism

QuestionAnswer
Two Types of Energy Kinetic, Potential
Kinetic Energy energy of motion
Potential Energy energy stored because of structure or location stored in chemical bonds
Delta G Free energy available to do work in a cell, never changes
A-(Delta) G rxn gives off energy, provides power
A+(Delta) G rxn needs energy
Thermodynamics study of energy transformation
Law of Conservation total amount of energy in the world is constant, can be transferred or transformed but cannot be created or destroyed
Entropy-Disorder every energy transformation increases entropy, energy available for doing useful work decreases with every transformation
Endergonic Reaction requires the input of energy
Exergonic reaction releases energy
Cellular Metabolism the sum of all endergonic and exergonic reactions in cells
ATP cell's energy shuttle 1 glucose molecules = 36 of these
Hydrolysis breakdown of molecules using water
Enzymes Large molecules that are catalysts for biologcal reactions, can lower energy barriers
Energy Activation (EA) amount of energy needed to start a reaction
Reactant another name for substrate binds to enzyme active site, converts to product,
Factors that Affect Enzyme Activity pH, temperature, salt concentration (ions), presence of co-factors
Denaturation disruption of enzyme structure due to adverse conditions
Inhibition blocks enzyme action
Competitive Inhibition blocks the substrate and binds to the active site
Non-competitive Inhibition binds to the second site on the enzyme
Created by: marlyj
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