BIOL 2051 Chapter : Structure And Function
Document Summary
1665 robert hooke was the first to describe microorganisms. First to see cells: fruiting bodies of mold. Florescent dye, staining cells bright blue because it complexes with the: dapi (4", 6-diamidino-2-phenylindole) can be added to cells to make cells dna. Can be used to visualize cells in various habitats . Optimize image resolution by using lenses with high light-gathering: usually kills the cells, uv light= mutations, compound light microscopes characteristics, electron microscopes. Use electrons instead of visible light (photons) to image cells and cell structures. Two types of electron microscopy: transmission electron microscope (tem) for observing internal cell structure. Look at pictures to see difference need to know difference! Mycobacterium leprae: scanning electron microscope (sem) for three-dimensional imaging and viewing surfaces. Usually plated in gold much higher magnification : found in armadillos hanson disease , not commonly found in humans rare. Genus=microplasma push the limit . 2microns tiny; no cell wall so all based on them because small genome .
