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Biology 4.1-4.3

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Term
Definition
Autotrophs   An organism that is able to make its own food  
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Heterotroph   An organism that depends on other organisms for food  
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ATP (adenosine triphosphate)   A compound that serves as a temporary energy storage molecules in all cells  
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ADP (adenosine diphosphate)   The molecule that is produced when ATP is split to yield energy  
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Photosynthesis   The process whereby simple sugars are formed from carbon dioxide and water is the presences of light and chlorophyll  
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Chlorophyll   The green pigment of plants cells that is necessary for photosynthesis  
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Pigment   A light absorbing molecules that functions in photosynthesis  
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Light dependent phase   The first phase of photosynthesis; requires light energy to Energize electrons in pigment  
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Electron transport chain   A series of aerobic reactions that release energy as they combine hydrogen and oxygen to form water  
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Calvin cycle   The most common pathway of photosynthesis; also called the carbon fixation cycle or light independent phase  
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Stroma   Material within the chloroplast that surrounds the Grana of thylakoids  
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ATP synthase   An enzyme necessary for the conversion of phosphate and ADP into ATP  
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Chemosynthesis   A process whereby certain organisms cellular energy from the breakdown of inorganic chemicals  
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cellular respiration   The breakdown of food (glucose) to release energy including both aerobic and anaerobic cellular respiration  
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Aerobic   Requiring oxygen  
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Anaerobic   Not requiring energy  
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Glycolysis   The breakdown of glucose to Pyruvic acid during cellular respiration  
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Krebs cycle   The stage of aerobic cellular respiration in which pyruvic acid reacts with an enzyme that removes a carbon from the pyruvic acid to produce acetyl CoA, CO2, hydrogen ions, ATP and electrons; also called the citric acid cycle  
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Acetyl CoA   A two carbon substance found in many cellular metabolism  
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Fermentation   The anaerobic breakdown of carbohydrates To pyruvic acid, and then to alcohol and carbon dioxide to lactic acid  
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