| A | B |
| substrate(s) | the material(s) thta bind to an enzyme |
| activation energy | energy required for a chemical reaction to occur |
| catalyst | material that speeds up a chemical reaction but does not get used up |
| product | the ending material(s) in a chemical reaction |
| enzyme | a protein that acts as a catalyst for a biological reaction |
| anabolism | a building reaction |
| metabolism | the sum of all chemical reactions within an organism |
| reduction | when an atom or molecule gains electrons |
| oxidation | when an atom or molecule loses electrons |
| catabolism | breaking larger molecules into smaller ones |
| Krebs cycle | The second stage of ACR; it oxidizes pyruvate to CO2 |
| Electron transport chain | Where NADH is used for energy to make ATP |
| ATP | molecule that is used for energy |
| glycolysis | the initial process of breaking the glucose molecule into two parts that takes place in the cytoplasm |
| cellular respiration | the process by which the stored energy in glucose is converted into a usable form (ATP) |
| anaerobic respiration | respiration without oxygen that often leads to fermentation and no additional ATP produced |
| aerobic respiration | respiration that requires oxygen and produces 36 total ATP |
| mitochondrion | where aerobic respiration produces ATP |