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23 Cards in this Set
- Front
- Back
- 3rd side (hint)
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How do Oraganisms Acquire And Use Energy?
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Matabolism
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What is Energy?
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Anything that can do work
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Move a muscle, make a protien
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What is the first law of Thermodynamics?
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Energy may change forms, but it is neither created nor destoryed.
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What is the second law of Thermodynamics?
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Energy changes always occur in the direction in which energy of the universe becomes more disordered
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Entropy
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A term from thermodynamics that discribes the amount of disorder or randomness in the universe or some part of the universe
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Autotroph
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An organism that can manufacture it's own food.
They can convert light energy into chemical engergy. |
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Hetrotroph
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An organism that cannot manufacture it's own food.
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They feed on autotrophs
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Kinetic Energy
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Energy that is doing work.
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Potential Energy
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Energy that is stored or inactive
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What are Enzymes?
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A Class of proteins that catalyze,or speed up, the steps of metabolism.
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Cannot force a reaction to go in a direction that is not consistent with the laws of thermodynamics.
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How do Enzymes work?
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They overcome the activation energy.
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Metabolic Efficiency
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Celluar Metabolism is characterized by metabolic pathways
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Metabolic Specificity
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A given enzyme only binds to a specific kind of molecule
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What is ATP?
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Assembled by energy metabolic pathways.
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Engery Currency of Life
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What is the fuction of ATP?
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These shuttle hydrogen atoms from one place to another and from one compound to another.
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How do Organisms use Energy?
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Cellular Respiration
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What is Cellular Respiration?
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Metabolic pathways in which cells harvest the energy from the metabolism of food molecules.
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What are the three stages of Cellular Respiration?
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-Glycolysis
-Krebs Cycle -Electron Transport Chain |
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What is Glycolsis?
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The breakdown of Gluclose into pyruvate.
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What is the Krebs Cycle?
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A series of reactions that are involved in the metabolism of glucose. These reactions occur in the mitocondria, begin with citrate and end with oxaloacetate.
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Electron Transport Chain
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A series of colecules that pass electrons,transferring them from higher energy levels to lower energy levels and using the energy to form ATP. These are oxidation-reduction reactions.
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What is Cristae?
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The folds of the inner mitochondrial membrane.
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What is ATP?
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The main energy molecule in living organisms. During Cellular metabolism, it is broken down to release usable energy and reformed to store energy. Chemically it is a nucleotide.
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