Curriculum
Science — First Preparatory
Unit 1: Matter
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Unit 2: Forces
0/6
Unit 3: Life
0/6
Unit 4: Earth and Space
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Text lesson
Cells and Life
Cells and Life
Structure of the cell and the functions of its parts
Structure of the cell and the functions of its parts
- All cells share some basic parts
- the most important of which are:
| Comparison aspect | Main idea | Keywords |
|---|---|---|
| Cell membrane | surrounds the cell and controls the substances that enter and leave it | surroundscontrolssubstancesenter |
| Cytoplasm |
| jellylikematerialfills |
| Nucleus | contains the genetic material (DNA) and controls the activities of the cell | containsgeneticmaterialcontrols |
| Mitochondria |
| centresenergyproductioncellular |
| Ribosomes | the sites where proteins are made | sitesproteinsmade |
| • | A plant cell has three additional parts | plantcellthreeadditional |
Key points
Cell wallmade of cellulose, it gives the cell support and a fixed shape.
Chloroplastscontain chlorophyll, and carry out photosynthesis.
Large central vacuolestores water, salts and food, and keeps the cell firm.
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