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11 Cards in this Set
- Front
- Back
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What are the two types of cells?
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Prokaryotic (do not have a nucleus)
eukaryotic (do have a nucleus) |
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Name one way in which a plant cell is similar to a prokaryotic cell but different from an animal cell.
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they have a cell wall whereas animal cell does not
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name one way in which a plant cell is similar to an animal cell but different from a prokaryotic cell.
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animal and plant cell have a nuclues whereas prokaryotic does not
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What does magnification mean?
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describes the extent to which an image has been enlarged
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What does resolution mean?
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the ability to distinguish between two points.
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what is the resolving power of light and electron microscope?
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light = 2 micrometres
electron = 1nm |
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what is the differene between light and electron microscope?
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electron microscope has a shorter wavelength and so they have a greater magnification and resolution.
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What are the two types of electron microscope?
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scanning = bounces bema sof of electrons of the surface of an object.
transmission = passes beams of electrons through object. |
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what is cell fractionation?
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breaks up (homogenises) cells
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whilst cell are being homogenised cells are kept in a solution that....
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a) has the same water potential as the cell
b)has a constant pH c) is cold |
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what is ultracentrifuagtion?
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seperates the components of the cells that have been broken up. ( heavy cells form pellets)
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