2010 Bio 320 Lecture 12

2010 Bio 320 Lecture 12 - Bacteria: Extremely diverse...

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Unformatted text preview: Bacteria: Extremely diverse organisms required for basic biological processes such as nitrogen fixation. alsocause a number of human diseases including strep throat, food poisoning, the plague, etc. Differ from eukaryotes in that there is a single, circular chromosome instead of several linear ones and the chromosome is not enclosed in a separate compartment (i.e, no nucleus). There is no meiosis and no true diploid state. Best studied bacterial species is E. coli Strain 1 I nsertion sequences (I S) are transposable elements that can move around the bacterial genome. inverted repeats are present flank the I S Strain 2 Different bacteria have different numbers of I S elements located in different places. Phenotypes used for bacterial genetics: resistance to drugs or phages, auxotrophies, colony morphology, ability to grow, ability to metabolize Nomenclature: Genes are indicated by three lower case letters indicating function of the gene followed by a letter. Wild-type is indicated by a plus sign, a non-functional allele by a minus....
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This note was uploaded on 03/28/2011 for the course BIO 320 taught by Professor N/a during the Spring '08 term at SUNY Stony Brook.

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2010 Bio 320 Lecture 12 - Bacteria: Extremely diverse...

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