COMPARES TYPES OF CELL WALLS Atypical cell walls a. A few prokaryocytes do not have a cell wall. 1) Members of the genus Mycoplasma have no cell walls. These organisms are also extremely tiny. 2) Since they lack a cell wall, their plasma membranes need extra strength. To provide this, Mycoplasma organisms incorporate sterols into the membrane. b. Cell walls of archaea do not contain peptidoglycan. 1) Most have a cell wall which contains pseudomurein instead. 2) A few archaea lack a cell wall. Damage to the Cell Wall a. Cell walls can be damaged by exposure to the enzyme lysozyme (found in tears, mucus, saliva). Cell walls of Gram-positive bacteria are more susceptible. b. If the Gram-positive cell loses its wall and is in hypotonic surroundings, it will undergo lysis
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This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.