Biology O Level 5090 Notes Better
Master Biology O Level 5090: Why Better Notes Make the Difference
Key Distinctions: Plant vs. Animal Cells
| Feature | Animal Cell | Plant Cell | Function |
| :--- | :--- | :--- | :--- |
| Cell Wall | Absent | Present (Cellulose) | Provides structural support and rigidity. |
| Chloroplasts | Absent | Present | Site of photosynthesis (contains chlorophyll). |
| Vacuole | Small or absent | Large, central | Stores cell sap; maintains turgor pressure. |
| Shape | Irregular | Fixed, regular shape | N/A | biology o level 5090 notes better
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Essential Organelles
- Nucleus: Controls cell activities and stores genetic information (DNA/Chromosomes).
- Cytoplasm: A jelly-like substance where chemical reactions occur; contains organelles.
- Cell Membrane: Partially permeable; controls the entry and exit of substances.
- Mitochondria: The "powerhouse" of the cell; the site of aerobic respiration.