ENDOMEMBRANE SYSTEM.docx

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Department
Biology (Biological Sciences)
Course
BIOL107
Professor
Lesley Harrington
Semester
Fall

Description
ENDOMEMBRANE SYSTEM IN PROK Chromosomes ­Long circle dsDNA, 5000  bp long ­Contain information E. Coli Strains ­Pathogenic H57:O7 4600 chromosomes, 4600  ­Beneficial K12 genes ­Lab Strains DH5a Plasmids ­Small circles of dsDNA; 1­ 100 copies ­Resistance (suppress  function of antibiotics) ­Fertility (DNA transfer) ­Having plasmids = better  in extreme cases, otherwise  reproduce slowly Ribosomes 7000­70,000/ cell 234; 121//rRNA rProteins Make new proteins Having MORE ribosomes =  faster reproduction 70S RIBOSOME Inclusion Bodies Stores nutrients in big  clumps Helps cell move to where  nutrients are IN EUK Nucleus Takes up 6% volume Has: ­ Chromatin ­ Pores ­ Envelope ­ Nucleolus (2 layers  + inner fluid +  lamina + pores x  3000) Makes RNA, assembles  ribosomes Plasma Membrane Holds everything inside ER Makes up 50­90% of  membrane  Lumen  ▯15% volume Rough ER Process membrane + export  proteins Make membrane lipids  (phospholipids) Smooth ER Metabolize drugs in liver  cells by adding OH Store calcium in muscles  ▯ rise in Ca++ = contraction;  gated and passive channel Lysosome Hydrolytic enzymes Interior is very acidic Vacuoles Usually contain food via  phagocytosis;  Contractile  ▯Expel water 
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