Energy Flow in the Life of a Cell
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16 terms
Terms | Definitions |
|---|---|
 Kinetic energy | energy of movement (light, heat), |
| Potential energy | stored energy (bonds, batteries) |
| chemical energy | type of kinetic energy converted potential energy, energy stored in covalent bonds, usually when food has potential energy, converted to kinetic energy |
| mechanical energy | type of kinetic energy, converted chemical energy |
| law of conservation | energy is neither created or destroyed |
| second law of thermodynamics | when converted, energy becomes less useful, less organized |
| entropy | indicates the relative amount of disorganization |
| exergonic reaction | reactants have more energy than products breaks down, release energy |
| endergonic reaction | products have more energy than reactants pulling together, absorbing energy |
| ∆G is negative | products has less free energy than reactants reaction is exergonic |
| ∆G is positive | products have more free energy than reactants reaction is endergonic |
| coupled reaction | exergonic reactions provide the energy for endergonic |
| Active site | on enzyme only area where a substrate (the reactant in the enzymatic reaction) can bind |
| Induced Fit Model | active site will undergo a slight change to better accommodate |
| Competitive inhibition | The process by which two or more molecules that are somewhat similar in structure compete for the active site of an enzyme. |
| Noncompetitive inhibition | the act of binding to another part of an enzyme, causing the enzyme to change shape and making the active site less effective |
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