BIOL130 : BiologyNotesPDF.pdf
6 Dec 2013
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History of cell theory: robert hooke 1665, leuwenhoek 1673-1700. Schwann 1838-1839: rudolf virchow 1858, theodor schwann cells of plants and animals. Cell theory / cell doctrine: rudolf virchow, 3rd part to cell theory. Prokaryotes 1-10 m (recently, rare exceptions have been found to be larger) Dna lies free in cell or sometimes in an area called nucleoid region. Dna is associated with fewer proteins and so is sometimes called "naked". Eukaryotes true nucleus (karp: p. 9 table 1. 1, p. 10 fig. All cells of multicellular organisms are eukaryotes. Eukaryotes 10-100 m (exception, caulerpa = largest single-cell organism) Dna is associated with a characteristic set of proteins: distinguished by size and organelles internal structures. Prokaryotes: nucleoid poor demarcated region cell (lacks boundary membrane to separate from surronding cytoplasm no nucleus no membrane bound organelles. Eukaryotes: contain nuclear region ribosom es cell wall, organelles: some examples. Mitochondria produce energy in form of atp. Ribosomes are bound to the membrane network.
