4 Cells.Class.11 - I Cell Structure(Based on Cell Theory II...

This preview shows page 1 - 18 out of 60 pages.

I.Cell Structure (Based on Cell Theory)II. Cell TypesD. Cytoskeketon A. ProkaryoticB. EukaryoticVI. Organelle FunctionIII. Cell SizesVII. Summary:Function of OrganellesIV.NucleusV.CytoplasmA. RibosomesB. EndomembranesC. Cell junctions
I. Cell TheoryAll organisms composed of cellsCells arise from pre-existing cellsWhat Does This Mean?All cells have similar chemical compositionCell is the unit of structure/function
II. Architectural PlansTwo Basic Cell Types (Based on structure)ProkaryoticBacteriaArchaeaEukaryoticProtistsMulticellular OrganismsRemember: Three types of organisms by phylogeny:Bacteria, Archaea, Eukaryotes
Prokaryotic CellsSmall (0.1μm - 10μm)Usually unicellularNo internal membranesNo internal compartmentsEarliest, most abundant life formsIncludes many pathogens
Background image
Background image
Protists, Fungi, Plants and Animals are composed of one or more eukaryotic cellsEukaryotic cells are larger and more complex than prokaryotic cells (see pp. 105-06)Eukaryotes are distinguished by internal membranesCells are divided into internal compartments with specialized functions: (see pp. 107-115) (a) separates incompatible chemical reactions(b) increases efficiency of chemical reactionsEukaryotic Cells
Generalized Animal Cell
Generalized Plant Cell
Cell size and shape relate to functionMost eukaryotic cells are 10-100μm in diameter
Comparing Cell Sizes
Main CompartmentsNucleusSite of DNA, RNA synthesisCytoplasmSite of protein synthesis, metabolismContains membranous organelles
IV. The NucleusBounded by nuclear envelopeDouble layered membraneHas many pores Connected to endoplasmic reticulum (ER)Contains nucleolusSite of ribosome synthesis, assemblyContains ChromatinDNA/Protein complexes that form chromosomes during cell division
Background image
Pores in Nuclear Envelope

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture