IntroBio-04- Cell structure and function

IntroBio-04- Cell structure and function - Cell structure...

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Cell structure and function 1
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History Early 17 th century - Anton von Leewenhoek - invention of the microscope 1665 - Robert Hooke used a microscope to observe and describe cells 19 th century Cell Theory 2
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Cell theory All organisms are composed of one or more cells Cell is the basic unit of live All cells arise from previously existing cells 3
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Cell shapes and sizes 4
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Cell types Prokaryotic cells (Bacteria, Archaea) Eukaryotic cells (Eukarya) 5
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Prokaryotic cells No nucleus No membrane-bound organelles Smaller in size Single celled ( unicellular ) 6
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Single circular molecule of DNA localized in a nucleoid Reproduce by binary fission 7
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Prokaryotic Cell Structure DNA pilus flagellum cytoplasm with ribosomes capsule cell wall plasma membrane 8
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E.coli 9
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Eukaryotic cells Nucleus Membrane-bound organelles Larger in size Uni- or multicellular 10
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DNA in the form of linear chromosomes localized in a nucleus Reproduce by mitosis or meiosis 11
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Similarities Both have plasma membrane Both have DNA as their genetic material Both produce 3 types of RNA
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IntroBio-04- Cell structure and function - Cell structure...

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