BIOL 2004 Lecture Notes - Lecture 12: Streptococcus, Staphylococcus, Archaea
6 Mar 2017
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12:58 pm: basic structure of prokaryote cells, cell membrane and envelope. Prokaryotes: two distinct domains of prokaryotes, bacteria = eubacteria, archaea = archaebacteria, archaea are similar in many respects but very different in some. Staphylococci: cluster (of cocci, others: branching chains, trichomes, etc. Sizes of prokaryotes: range is from 0. 2 micrometers to 700 micrometers, typically 1 micrometer per cell, very high ratio of surface area to volume, have an efficient ability to take in nutrients from surrounding environment. Ecoli cell: mostly made of water, a lot of lipids, many proteins, out of all components, mrna is the least. Function-rich cell membrane: complex envelope - usually including a cell wall, other external features are common, ex. flagella, pili/fimbriae. Small compact genome - usually single circular chromosome. Function: mostly involving membrane proteins, selective permeability, control movement of most molecules into and out of cytoplasm.
