BIO 200 Lecture Notes - Lecture 12: Hydrogen Sulfide, Heterotroph, Spirochaete
7 Oct 2016
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Document Summary
Prokaryotes : 2/3"s of the tree of life in lecture, fundamentally different from eukaryotes, early classification, metabolism, differentiating archaea and bacteria, common bacteria, common archaea. Prokaryotes are 2/3"s of the domains in the tree of life! Nucleoid region in two neisseria gonorrhoeae cells. Horizontal transfer: 20% of the genes in thermotoga maitima are archaean in origin, the prokaryote tree may be more of a web, cell walls differ in bacteria (and archaea) Prokaryotes have a wide variety of metabolism styles. Anaerobes= poisoned by oxygen (obligate, facultative, and aerotoleran) Chlorophyll = pigments to gain energy, water= electron donor. Chemical bonds= energy source, carbon dioxide= organic material; make sugars. Bacteriochlorophyll= pigment, hydrogen sulfide= electron donor, cannot break down carbon dioxide, so carbon source= other organisms. The prokaryotes have us working in the dark. Low-gc, gram positive can be dormant for long periods (endospores)
