01:119:116 Lecture Notes - Lecture 2: Gram-Negative Bacteria, Peptidoglycan, Cell Membrane
20 Jan 2018
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Audio recording started: 11:56 am friday, january 19, 2018. The answer to the question is 1, 2, and 4. Quick review for prokaryotes- (they have no nucleus) How do we hypothesize that life first originated?- 2 hypothesis. Iron sulfur-world: life evolved at the bottom of the ocean. Prebiotic soup-life: evolved because oxygen was very low. Bacteria; archaea (look @ lecture 4 which is the origin of life) And photosynthesis in plasma membrane: cell wall. Cell wall functions: protection, maintain cell shape, prevents bursting in hypotonic solution, on your own: review figure 7. 12-osmosis 115 lecture 6. 2 step process stain wash to id bacteria: Found in all domains but analogous (convergent evolution) *flagella is found in all domains: reproduction. How can bacteria end up being different from one another: mutations. Two factors give rise to high levels of genetic diversity. Mutation in a gene is 1 in 10 million chance.
