| A | B | 
|---|
| Products have more energy than the reactants | result of a chemical reaction that absorbs energy | 
| Products have less energy than that of the reactants | result of a chemical reaction that releases energy | 
| activation energy | energy needed to start a chemical reaction | 
| enzyme | proteins that can speed up chemical reactions | 
| catalyst | general name for a chemical that can make a reaction go faster | 
| metabolism | chemical reactions in an organism | 
| substrate | a molecule that an enzyme changes | 
| active site | the fold, area on an enzyme that the substrate attaches | 
| heat, acidity, concentration | factors that affect an enzyme's activity | 
| ATP | energy storage molecule | 
| ADP and phosphate group | result the release of energy from ATP | 
| growth, repair, transport | activities that require energy | 
| phosphate bond | location of where energy is stored in ATP | 
| plants use the sun's energy to do this | produce carbohydrates | 
| carbohydrates from plants provide other organisms with this | energy | 
| molecule excited by light | chlorphyll | 
| Role of ATP and NADPH in photosynthesis | power stage 3, the building of carbohydrates in the Calvin Cycle | 
| Carbon dioxide and water | the reactants needed in photosynthesis to make carbohydrates | 
| electrons | particles passed from one molecule to another in order to transfer energy | 
| carbohydrates (glucose) and oxygen | major product of photosynthesis | 
| water | supplies the replacement electrons in photosynthesis | 
| C, H, O, N, P | elements involved in photosynthesis | 
| what molecule enters the Krebs cycle that will end up in sugar | carbon dioxide | 
| Where does the Hydrogen come from that ends up in sugar? | water splitting | 
| glycolyis | the 1st stage in cellular respiration | 
| products of cellular respiration | water, carbon dioxide, and ATP | 
| mitochondria | organelle where oxidative respiration takes place | 
| chloroplast | organelle where photosynthesis takes place | 
| result of glycolysis | glucose split into pyruvic acid | 
| amount of energy gained in glycolysis | 2 ATP molecules | 
| breakdown of organic compounds in the absence of oxygen | fermentation | 
| ethyl alcohol and carbon dioxide | end products of fermentation by yeast | 
| lactic acid | the end products of fermentation by humans | 
| feedback inhibition | controls the rate of metabolism in organisms | 
| oxidative respiration | stage of respiration that generates the MOST ATP | 
| Krebs Cycle | pyruvic acid enters this stage of cellular respiration to generate more ATP | 
| NADH | molecule used to transfer electrons to the electron transport chain | 
| reason we don't burn up from releasing energy from glucose | energy is released in small packets | 
| number of ATP produced iin oxidative respiration | 36 ATP molecules | 
| purpose of cellular respiration | provide energy to the cell using the energy stored in glucose |