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Ch 8 metabolism

Key terms

QuestionAnswer
Metabolism The totality of an organism's chemical reactions
Metabolic pathway Begins with a specific molecule, which is then altered in a series of defined steps, resulting in a certain product
Catabolic pathways Release energy by breaking down complex molecule to simpler compounds
Anabolic pathways Consume energy to build complicated molecules from simpler ones
Frist law of thermodynamics The energy of the universe is constant. Energy can be transferred and transformed but it cannot be created or destroyed
Entropy A measure of disorder
Second law of thermodynamics Every energy transfer or transformation increases the entropy of the universe
Free energy The portion of a system's energy that can perform work when temperature and pressure are uniform throughout the system
Equilibrium The forward and backward reactions occur at the same rate
Exergonic reaction Net release of free energy (-G)
Endergonic reaction Absorbs free enrgy from surroundings
Phosphorylated Recipient of the phosphate group
Activation energy The initial investment of energy for starting a reaction
Created by: gfry164
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