Chapter 7 INSIDE THE CELL

Chapter 7 INSIDE THE CELL -...

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Chapter 7  INSIDE THE CELL The cell membrane encloses the cell contents. Summary *Cell contents *Prokaryotic cells *Eukaryotic cells *Nucleus *Organelles *Cytoskeleton *Outside the cell membrane Cell Contents *Cytoplasm = cell contents *Cytosol – liquid/gel matrix *Organelles Nucleus /nucleolus Prokaryotic Cells *Cytoplasm *NO MEMBRANE BOUND NUCLEUS      – DNA localized to “nucleoid region”. *Plasmids     *Ribosomes       *Some have extensive infoldings of cell membrane.  Ex. photosynthetic  pigments and enzymes. *Other features *Some have flagella  (protein flagellin ) for movement. *Pili      for attachment ***Cell Wall - always Eukaryotic Cells *Two prominent features ***Compartmentalization  ***DNA is contained in a membrane bound organelle – the nucleus.  1
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*Euchromatin *Heterochromatin  *Nucleus      – storage files of hereditary material, DNA, fig 7.7. *Nuclear envelope      = double membrane with large pores.  Inner surface has  proteins to which chromosomes are attached.
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Chapter 7 INSIDE THE CELL -...

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