Cell Structures (Edexcel IGCSE Biology: Double Science)
Revision Note
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Biology Lead
Cell Structures
- Cells are separated from their surrounding environment by a cell membrane
- Within the cell membrane is the cytoplasm
- Eukaryotic cells have organelles contained within their cytoplasm
- Organelles are subcellular compartments where specific processes take place within the cell
- Within the cytoplasm of eukaryotic cells the following organelles are present
- Nucleus
- Mitochondria (singular mitochondrion)
- Ribosomes
- Plant cells contain the following additional structures
- Cell wall
- Chloroplasts
- Permanent vacuole
When viewed under a microscope the structures inside a plant cell are visible. Ribosomes and mitochondria are too small to view under a light microscope but are visible with the higher resolution of an electron microscope.
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