KEY TAKEAWAYS •
Metabolism basically involves the catabolism of certain organic molecules.
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Glycolysis is the first step in breaking down glucose into pyruvate, yielding some ATP and molecules that can later be used to make more ATP.
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There is a transition reaction between glycolysis and the Krebs cycle.
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Some organisms proceed from glycolysis to fermentation, which has different end products, depending on the organism. These can be things like lactic acid, acetic acid, and CO2.
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The Krebs cycle is cyclic and generates ATP and other molecules that can later be used to make energy.
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Most of the ATP is gotten through oxidative phosphorylation and the electron transport chain.
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Energy is stored by transferring hydrogen ions across a membrane in a cell, which goes on to drive the synthesis of ATP.
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Photosynthesis involves two phases of reactions that capture light to make organic molecules.
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The biogeochemical cycles will involve the movement of molecules into different forms and in different aspects of the environment.
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