Science — AI-generated practice question

Differences between Aerobic and Anaerobic Respiration:

| Basis | Aerobic Respiration | Anaerobic Respiration |
|---|---|---|
| Oxygen | Requires oxygen | Occurs without oxygen |
| Site | Cytoplasm + mitochondria | Cytoplasm only |
| End products | CO₂ + water + energy | Ethanol + CO₂ + energy (in yeast); lactic acid + energy (in muscles) |
| Energy released | Large amount (more ATP) | Small amount (less ATP) |
| Completeness | Glucose completely broken down | Glucose partially broken down |

Organisms using anaerobic respiration: Yeast is a common example. Certain bacteria also respire anaerobically. Even human muscle cells temporarily switch to anaerobic respiration during vigorous exercise, producing lactic acid, which causes muscle cramps.

Source: Chapter 5, Life Processes

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• Examiners expect a tabular format for "differences" questions — it earns full marks neatly and clearly.
• Mention both end-product examples: ethanol + CO₂ (yeast) and lactic acid (muscle cells) — both are in the syllabus.
• The key scoring point is that aerobic respiration releases more energy than anaerobic. Don't skip this.
• "Name an organism" needs at least one specific example — yeast is the safest answer; mentioning bacteria is a bonus.
• The breakdown of pyruvate occurs in the mitochondria (aerobic) vs cytoplasm (anaerobic) — a commonly tested detail.