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5 Cards in this Set
- Front
- Back
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Describe the structure and function of the plasma membrane (cell membrane)
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Structure-Fluid Mosaic Model; composed of phospholipids with hydrophilic (polar)heads and hydrophobic(non-polar)tails; Other proteins may also be incorporated
Function- Selective permeability allows the regulation of the conditions inside the cell independently from the outside environment |
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Prokaryote vs. Eukaryotic
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Prokaryote- Bacteria; cell wall present but no plasma membrane; no nucleus; ribosomes made of 30s and 50s subunits; no membrane bound organelles
Eukaryote- Protists, fungi, plants and animals; cell wall only in fungi and plants; nucleus; ribosomes made of 40s and 60s subunits; membrane bound organelles |
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Summarize Cell Theory
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-All living things are composed of cells
-The cell is the basic functional unit of life' -Cells arise only from pre-existing cells -Cells carry genetic information in the form of DNA. This genetic material is passed from parent to daughter cell |
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Describe the 3 types of microscopy
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1. Compount light microscopy; used on dead cells, uses lenses; need to dye the cells
2. Phase Contrast; used on living cells, special light microscope; uses different refractive indexes 3. Electron Microscopy; used on dead cells; requires dyes often made up of heavy metals; tissues must be fixed and thinly sectioned |
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What is Autoradiography?
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Technique using radioactive molecules to identify cell structure and biochemical activity. Can be used to study protein synthesis. Used on living cells
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