MIC 360- Final Exam Guide - Comprehensive Notes for the exam ( 29 pages long!)
Document Summary
Growth in a dish: used to discriminate against dissimilar strains, can form close boundaries and merge compatibly with similar strains/close relatives. Motile cells use pili to adhere to surface. Collecting in a group such as a bio lm allows for quorum sensing products. Better cell communication and transfer of genetic material. Example: bio lms in the colon with colon cancer and adenomas. Strains help regulate levels of other bacteria in the gut, bio lm helps modulate immune responses to pathogens: transcriptional activation and repression of lac operon. In high levels of glucose, the lac operon transcription is turned o . Lac i produces a repressor protein that prevents the rna polymerase from binding and transcribing the dna. When glucose is completely used up and in the bacteria has lactose in its environment, the repressor protein will bind the lactose molecule and the lac i repressor protein will fall o the. The genes lac z,y,a are transcribed onto one mrna.
