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12 Cards in this Set
- Front
- Back
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What is Metabolism? |
Chemical reactions that occur in a cell - usually to transform matter and energy. Metaboliam = Catabolic and Anabolic reactions. |
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Definition of Metabolic Pathways |
Product of one rxn becomes reactant of next rxn. Rxn catalyzed by enzymes. |
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2 types of energy to do work: |
1. Kinetic Energy (Energy of motion) 2. Potential Energy (stored energy) |
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Describe what happens in a catabolic rxn |
Large to small molecules. Release energy (synthesize large molecules) Example: Cellular Respiration |
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Describe what happens in an anabolic rxn |
Small to large molecules. Use up energy (building requires energy). Ex: Photosynthesis |
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Definition of Laws of Thermodynamics |
Study of change of energy change in a system |
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Describe the Laws of Themodynamics |
1st Law: Energy cannot be created or destroyed. Energy can only be transformed. Ex: Energy for jogging is from eating potential energy in food molecules. Potential energy then becomes kinetic energy used for jogging.
2nd Law: Universe tends towards disorder (entropy). Ex: Messy room easier to maintain than clean room |
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How does entropy work? |
Measure of randomness or disorder in energy or in a collection of objects.
High entropy: more randomness or disorder Low entropy: less randomness or disorder |
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What is Free Energy? What is the equation? |
Energy availible to do useful work. Delta G = G final (products) - G initial (reactants) |
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Describe endergonic and exergonic reactions |
Exergonic: Delta G = negative Energy released Products have less free energy than reactants G final < Ginitial Spontaneous rxn
Endergonic: Delta G = positive Require energy to proceed Products have more free energy than the reactants G final < G initial Not a spontaneous rxn |
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ATP definition |
Primary source of energy in living cells. |
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Coupled Reactions Description |
Cells use exergonic rxn to provide energy to synthesize ATP from ADP and Pi. Cells then use hydrolysis of ATP to provide energy for endergonic exn. |
