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SmallGroup_1.Part_I.Sp_08

SmallGroup_1.Part_I.Sp_08 - b Which structure provides...

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BioMi 290 February 8, 2008 Small Group Activity 1 Cell Structure and Function Do this part before you come to Small Group on Friday. To prepare, review sections 4.5, 4.6, 4.8, and 4.9 in BBOM, 11 th ed. Part I 1) Look at the diagrams on the next page of 3 different prokaryotic cell envelopes. Determine which figure shows a Gram (+), a Proteobacterial or Gram (-), and an Archaeal cell envelope. 2) Label the components of each cell envelope using the list below. (Note: not all cells have all the structures listed) cell wall cytoplasmic membrane membrane-bound proteins outer membrane lipopolysaccharide lipoteichoic acid periplasmic space porins teichoic acid 3) Answer the following questions: a) Which structure is the true permeability barrier?
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Unformatted text preview: b) Which structure provides support and shape? c) What is “cross-linking” in the cell wall? Why is it important? d) Which structure only allows hydrophilic small molecules (< 600 daltons mol wt) through? Where are these found? Which organisms have them? e) What happens if you treat a bacterial cell with lysozyme under isotonic conditions? What is this type of cell called? BioMi 290 February 8, 2008 Cell envelope type ______________ outside cell protein "S-layer" cytoplasmic membrane inside cell Cell envelope type ____________ outside cell peptidoglycan layer cytoplasmic membrane inside cell Cell envelope type ______________ outside cell peptidoglycan cytoplasmic membrane inside cell...
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