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2.4 organelle func.
B2.4 (cellular processes): function of organelles
| Organelle | Description |
|---|---|
| Nucleus | Contains the genetic material (DNA) of the cell. |
| Ribosome | The site of protein synthesis. They may be attached to the ER or free. |
| Cytoplasm | The jelly-like fluid inside cells. It offers support to the cell and is the site of some reactions. |
| Vacuole | Used to store different compounds. It is large and central in plants. |
| Golgi body | It modifies and packages proteins for transport. |
| Endoplasmic reticulum | Involved in the synthesis of proteins, steroids and lipids (fats). It may be smooth or rough. |
| Mitochondria | The site of aerobic respiration. |
| Plasma membrane | Separates the cytoplasm from the extracellular environment and controls what enters and exits the cell. |
| Cell wall | The semi-rigid layer on the outside of plant cells. It is made of cellulose and provides structural support. |
| Chloroplast | The site of photosynthesis. It is only found in plant cells. |
| Lysosome | Breaks down waste material. |
| Nucleolus | Produces ribosomal RNA |