Bio - Lecture 8a

Bio - Lecture 8a - Lecture 8A: Chemical Energy All cells...

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Sheet1 Page 1 Lecture 8A: Chemical Energy All cells need energy to live Some cells (plants, algae, and some bacteria) make their own food -Called autotrophs Most other cells need to "eat" -Called heterotorphs Photosynthesis is: -12H2O + 6CO2 -> 6O2 + C6H12O6 + 6H2O Aerobic respiration is: -6O2 + C6H12O6 -> 6H2O + 6CO2 Digestion is the breaking down of larger molecules into smaller ones The bonds of the smaller molecules contain energy Catabolism: THe using of energy to BREAK bonds Anabolism: The using of energy to MAKE bonds Metabolism: The sum of catabolism and anabolism The energy stored in chemical bonds is stores in the electrons and make these bonds Hih energy electrons are transferred to molecules and they release energy Some of the released energy is "Captured" in ATP to be used later If the final electron acceptor is oxygen, the process is called Aerobic Respiration If the final electron acceptor is an inorganic molecule, the process is Anaerobic Respiration If it is an organic molecule it is called fermentation
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