BIO1011 Chapter Notes -Scanning Electron Microscope, Transmission Electron Microscopy, Electron Microscope
Document Summary
In a light microscope, visible light is passed through the object under the microscope and then through glass lenses: the lenses bend the light so that the image of the object is magnified. The electron beam scans the surface of the sample, which is coated with a thin film of gold: transmission electron microscope is used to study the ultrastructure of cells. It aims an electron beam through a very thin section of the specimen. Cell fractionation: cell fractionation takes cells apart and separates the major organelles and other subcellular structures from one another. It enables researchers to prepare specific cell components in bulk and identify their functions. Motility: the flagella is scattered all over the cell or at one or both ends of the cell, the flagella of prokaryotes are different to eukaryote"s due to their molecular composition and their mechanism of force. In eukaryotes, the sexual processes of meiosis and fertilization combine.
