Biology UNIT 1
- Created by: Imogen Maytum
- Created on: 11-11-13 17:32
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- Movement and Stability in cells
- CYTOSKELETON
- Cells contain a network of fibres made of protein.
- These fibres keep the cell's shape stable by providing an internal framework (called the cytoskeleton).
- Fibres that are important are the following;
- ACTIN FILAMENTS
- They are like fibres found in muscle cells and they are able to move against each other.
- These fibres cause the movement seen in some white blood cells. They also move some organisms around inside cells.
- They are like fibres found in muscle cells and they are able to move against each other.
- MICROTUBULES
- These are cylinders about 25nm in diameter.
- They are made of a protein called tubulin.
- They may be used to move an organism through a liquid or to waft a liquid past the cell.
- Other proteins present on the microtubules move organelles and other cell contents along the fibres.
- This is how the following occurs;
- How chromosomes are moved during mitosis
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- How vesicles move from ER to the Golgi Apparatus.
- Microtubules use ATP to drive both these movements.
- How chromosomes are moved during mitosis
- This is how the following occurs;
- Other proteins present on the microtubules move organelles and other cell contents along the fibres.
- They may be used to move an organism through a liquid or to waft a liquid past the cell.
- They are made of a protein called tubulin.
- These are cylinders about 25nm in diameter.
- ACTIN FILAMENTS
- Fibres that are important are the following;
- These fibres keep the cell's shape stable by providing an internal framework (called the cytoskeleton).
- Cells contain a network of fibres made of protein.
- CYTOSKELETON
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