NATS 1670 Study Guide - Midterm Guide: Methionine, Deoxyribose, Silent Mutation
23 Oct 2012
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Document Summary
Result from two aspects of division during binary fission: the planes in which cells divide and whether or not daughter cells completely separate or remain attached. No archaea are known to cause disease-no human pathogens. Extremophiles: microbes that require extreme conditions of temperature, ph, and/or salinity to survive. Thermophiles-do not function with a temperature of lower than 45 degrees (recombinant dna technology) Hyperthermophiles- require temperatures over 80 degrees (found in hot springs) Halophiles- require extreme saline habitats (usually 17-23% nacl) Methanogens- convert co2 , h2 and organic acids into methane gas (ch4) (largest group of known archaea) Live in the intestinal tract of cows, producing 400 liters of methane a day. If all the methane trapped in ocean sediments were released, it would wreak havoc with the world"s climate. Many infections of humans are caused by acellular (non-cellular) agents, including viruses and other pathogenic particles.
