(a) Respiration and Combustion
(b) Glycolysis and Krebs’ cycle
(c) Aerobic respiration and Fermentation
Solution:
a)Respiration and Combustion
| Respiration | Combustion |
| It is a biochemical process | It is a physicochemical process. |
| Temperature stays low | Temperature drastically raises |
| It’s found in living cells. | It is a non-cellular process |
| Energy entrapped in the form of ATP | The combustion process does not necessitate the use of ATP. |
b) Glycolysis and Krebs’ cycle
| Glycolysis | Krebs Cycle |
| The first step in respiration | The second step in respiration |
| Takes place in cytoplasm | Takes place in mitochondria |
| Occurs both aerobically and anaerobically | Occurs only in aerobic |
| Two ATPs are consumed | ATPs are not consumed |
| The net gain is 8 ATP’s | The net gain is 24 ATP’s |
| It is a linear pathway | It is a circular pathway |
c) Aerobic respiration and Fermentation
| Aerobic respiration | Fermentation |
| Included in the exchange of gases | Does not include exchange of gases |
| Aerobic respiration necessitates the presence of oxygen. | For the fermentation process to work, there should be no oxygen present. |
| Respiratory material is completely oxidised | Respiratory material is incompletely oxidised |
| The end products are inorganic | At least one product is organic |