BIOL 1004 Lecture Notes - Lecture 18: Mutation, Flagellum, Cyanobacteria
27 Mar 2017
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Document Summary
Horizontal gene transfer is the movement of genes from one genome to another. This occurs by exchange of transposable elements and plasmids, viral infection and fusion of organisms. Hgt challenges the notion of a tree of life. Diversity of life i textbook chapters 27-28. Note: the entirety of these chapters will not be covered, so focus on the relevant sections in the textbook that relate to the lectures. All life forms have: genetic code with transcription and translation, metabolism and atp. Archaea: extremophiles: live in extreme environments, extreme halophiles: live in highly saline environments, extreme thermophiles: live in environments with extreme temperature, methanogens: live in swamps and marshes and produce methane as a waste product. These are strict anaerobes and poisoned by oxygen gas. Emerging research has been studying the link between our bacteria and our physical and mental health. Flagella and motility: by use of a flagella, many bacteria are able to move (exhibit taxis) toward a stimulus.
