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Unformatted text preview: pathogenesis eg. UTI'"s, biofilms, teeth, glass, rocks (Pellicle formation in culture). Some Pili specialized. Sex pilus. 1946 experiment with minimal media showed genes transfered requiring contact. Define: auxotroph, prototroph, mutation rate. Minimal media (Glucose salts media). Mating types. F+ and F- (movie) e. other structures: 1. Chromatin Body--Long cirucular piece of DNA. Couple of thousand genes. It is haploid and relatively easy to manipulate eg. ..stick other genes into using bioengineering techniques. 2. Plasmids---small cirucular pieces of DNA (F factor is on a plasmid, Antibiotic resistance carried on plasmids). They are easily transferred from one cell to another. During sexual transfer recipient becomes F+. 3. Ribosomes---70s----50 + 30. Two parts. e. Mesosomes, endospores, fat globules, polyphosphate, Sulphur granules, magnetosomes, photosynthetic structures....
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- Fall '09