Lecture 6-1201

Lecture 6-1201 - Lecture6 15:05 ThreeDomains Bacteria...

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Lecture 6 15:05 Overview-Cell Structure Keeping cell distinct from the environment Organizing and coordinating metabolic processes Three Domains Bacteria Archea Eukarya We’ll Use two categories Prokaryotes Eukaryotes Prokaryotes “before” the nucleus No internal membrane-bound organelles Eukaryotes True nucleus Have organelles bounded by membranes Fig 6.6 Prokaryotes (bacteria and blue green algae) 1. Cell wall of carbohydrates and peptides 2. Ribosomes differ from eukaryotes in size and antibiotic sensitivity 3. No nucleus or linear (histone-complexed) chromosomes 4. No internal membranes Fig 6.9a Fig 6.9b Eukaryotes (animals, plants, fungi, yeasts) Larger cell size o Need increased internal membranes o Problem of intake of nutrients o Problem of coordination and control of metabolism o More opportunities as a heterotroph Insert Table-5?s on test on this table Prokaryote Animal Plant Plasma  + + +
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Cell wall + - + Nucleus - + + DNA circular linear linear Ribosomes smaller larger larger ER - + + Golgi  - + + Lysosomes - + similar Vacuoles - Small or  absent Large,  one
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This note was uploaded on 08/22/2010 for the course BIOL 1201 taught by Professor Wishtichusen during the Spring '07 term at LSU.

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Lecture 6-1201 - Lecture6 15:05 ThreeDomains Bacteria...

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