BIOL 3380 Study Guide - Spring 2019, Comprehensive Final Exam Notes - Bacteria, Escherichia Coli, Acid
Document Summary
Bacterial genome (very little junk dna: range from 0. 4 to 10 million bases. Is like chain length fence: thickness 60 to 80 nm think (60 layers thick) Mycoplasma: only has cytoplasm and cell membrane, lives on humans, bacteria with only cytoplasm and cell membrane would burst in normal conditions because osmatic pressure is too great in cell. Gram positive bacterium: cytoplasm + cell membrane + cell wall. Escherichia coli (e. coli: model organism, 4. 5 million base pairs. Cell structure and growth: cytoplasm cell membrane (1 to 5 microns thick cell; cell membrane is about 7 nanometer) van der waals and h bonding keeps phospholipid bilayer together cell. Italicized or underlined: sphere, aureus means yellow, mrsa methathilin resistant; very virulent, ex. Streptococcus mutans: sphere, causes cavities sugar (sucrose, pyogenes, strep throat, ex. Bacillus anthracis: causes anthrax, commonly spherical, medicine don"t let bacteria make peptidoglycan; ex. penicillin. Gram negative bacterium: commonly rod shaped, cytoplasm.
