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chapter 4 vocabulary

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Term
Definition
ATP   molecule that transfers energy from the breakdown of food molecules to cell processes  
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ADP   a lower-energy molecule that can be converted ATP by the addition of a phosphate group  
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chemosynthesis   process by which some organisms use chemical energy instead of light energy to make energy storing carbon-based molecules.  
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photosynthesis   captures energy from sunlight to make sugars that store chemical energy  
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chlorophyll   a molecule in chloroplasts that absorbs some of the energy in visible light  
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thylakoid   membrane-bound structure within chloroplasts that contain chlorophyll and other light-absorbing pigments used in the light-dependent reactions of photosynthesis  
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light-dependent reaction   part of photosynthesis that absorbs energy from sunlight and transfers energy to the light-independent reactions  
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light-independent reaction   part of photosynthesis that uses energy absorbed during the light-dependent reactions to synthesis carbohydrates  
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photosystem   energy is captured and transferred in the thylakoid membranes by two groups of molecules  
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electron transport system   series of proteins in the membrane of the thylakoid  
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ATP synthase   part of a complex enzyme  
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calvin cycle   process by which a photosynthetic organism uses energy to synthesize simple sugars from CO2  
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cellular respiration   releases chemical energy from sugars and other carbon-based molecules to make ATP when oxygen is present  
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aerobic   needs oxygen to take place  
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glycolysis   splits glucose into two three-carbon molecules and makes two molecules of ATP  
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anaerobic   doesn't need oxygen to take place  
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krebs cycle   produces molecules that carry energy to the 2nd part of cellular respiration  
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fermentation   doesn't make ATP, allows glycolysis to continue  
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lactic acid   causes your molecules to "burn" during hard exercise  
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