| A | B |
|---|
| energy | power needed by an organism to carry on life processes |
| activation energy | energy needed to jump start a chemical reaction |
| endergonic reaction | chemical reaction that stores energy |
| photosynthesis | an endergonic reaction that stores energy in the bonds of glucose |
| exergonic reaction | chemical reaction that releases energy |
| cellular respiration | an exergonic reaction that releases energy by breaking the bonds of glucose |
| ATP | adenosine triphosphate – energy molecule formed in photosynthesis and broken apart in cellular respiration to produce energy |
| reactants | starting materials in a chemical reaction; formulas before the arrow |
| products | materials resulting from a chemical reaction; formulas after the arrow |
| by-product | product of a chemical reaction not needed by the organism; a waste product |
| enzyme | protein that lowers the amount of activation energy needed to start a chemical reaction; binds together or breaks molecules apart |
| active site | site where an enzyme binds to a particular molecule to break it apart or to join two or more chemicals together |
