| A | B |
| aerobic | oxygen gas is present |
| anaerobic | oxygen gas is not present |
| cell respiration | conversion of food molecule energy to ATP energy |
| mitochondria | site of aerobic stages of cell respiration |
| cytoplasm | site of anaerobic stages of cell respiration |
| glycolysis | first anaerobic stage of cell respiration |
| Kreb's cycle | second stage of aerobic cell respiration |
| electron transport chain | third stage of aerobic cell respiration making most ATP |
| NAD+ & FAD | empty electron carriers that harvest food's electrons & energy |
| fermentation | an anaerobic process following glycolysis w/o O2 |
| lactic acid | product of fermentation by bacteria & muscle |
| alcohol | product of fermentation by yeasts |
| ATP synthase | enzyme for ADP + phosphate --> ADP during the final phase of cell respiration |
| combustion | burning organic compounds in O2 releasing heat |
| oxygen gas | reactant of aerobic cell resp, + glucose |
| carbon dioxide | product of cell resp, + water |
| glucose | C6H12O6, reactant starting glycolysis |
| two | ATP produced during glycolysis |
| four | ATP produced during Kreb's cycle |
| 26 to 30 | ATP produced during the last phase of aerobic cell respiration |