Bio - Lecture 5

Bio - Lecture 5 - Chapter 4 Lecture: Major difference...

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Sheet1 Page 1 Chapter 4 Lecture: Major difference between prokaryotes and eukaryotes is the latter has compartmentalization Accomplished by an endomembrane system Uses several organelles (membrane-enclosed compartments specializing in a specific process) Eukaryotes also have a cytoskeleton to maintain cell structure The nucleus is the organelle that contains the cell's genetic material (DNA is made of nucleic acids) Surrounded by a double plasma membrane called the nuclear envelope Most cells only contain a single nucleus The nucleolus is a region within the nucleus where ribosomal RNA synthesis occurs Nucleus: Eukaryotic (contains DNA) Nucleoid: Prokaryotic Nucleolus: Eukaryotic (contains RNA) Nuclear envelope: Two sets of lipid bilayers Nucleus contains nuclear pores which allow the transport of specific molecules in and out of the nucleus -In: proteins needed for chromosome packing or enzymes to catalyze genetic processes -Out: RNA and protein-RNA complexes Chromatin is the entire collection of a cell's DNA and the associated proteins
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This note was uploaded on 05/06/2008 for the course BIOL 121 taught by Professor Lopez during the Fall '07 term at Lansing.

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Bio - Lecture 5 - Chapter 4 Lecture: Major difference...

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