Practice Questions
1.State where respiration occurs
In every living cell
2.Summarise the differences between aerobic and anaerobic respiration
| Feature | Aerobic Respiration | Anaerobic Respiration |
|---|---|---|
| Oxygen needed | Yes | No |
| Location | In mitochondria | In cytoplasm |
| Word equation | Glucose + oxygen → carbon dioxide + water | Animals:Glucose → lactic acid Plants & yeast: Glucose → ethanol + carbon dioxide |
| Products | Carbon dioxide and water | Lactic acid (animals) Ethanol and carbon dioxide (plants and yeast) |
| Energy transferred | Large amount of energy | Small amount of energy |
| Breakdown of glucose | Complete breakdown | Incomplete breakdown |
| When it happens | Normal conditions when oxygen is present | When oxygen supply is limited e.g. during intense exercise |
| Effect on muscles | No oxygen debt | Oxygen debt builds up |
3. Under what conditions will animals carry out anaerobic respiration.
During intense exercise when oxygen cannot be delivered quickly enough to muscle cells, then anaerobic respiration will occur.
Factors affecting the rate of photosynthesis
Measuring & calculating rates of photosynthesis
Inverse square law and photosynthesis
Economics of enhancing the conditions in greenhouses
Investigating the effect of light intensity on the rate of photosynthesis