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Microbiology Lec 2

Micriobiology Lecture 2

QuestionAnswer
Bacterial Size 0.2-2.0 micrometers in diameter 6 micrometers in length
4 basic morphologies of bacterial cells cocci (spherical shape) bacilli (rod shaped) spirilla (spiral shaped) virbrios (comma shaped)
Cocci - may be arranged in pairs (diplococci) - may be arrange in chains (streptococci) - may be arranged in clusters (staphylococci)
Bacilli - may be club shaped (coccobacillary) - may be dumbbell shaped (coryneform)
Spirilla - may vary as to the looseness or tightness of the coils
Major Groups of Prokaryotes Bacteria, blue green algae
Contents of cell wall peptidoglycan, lipids, proteins
Contents of Bacteria cell - nuclear structure, no nuclear membrane - single, closed, circular, ds DNA chromosomes - haploid - continuous translation/transcription w/short lived mRBA and polyribosome formation -no histones
Contents of Bacteria cell - nuclear structure, no nuclear membrane - single, closed, circular, ds DNA chromosomes - haploid - continuous translation/transcription w/short lived mRBA and polyribosome formation -no histones
Cytoplasm of Prokaryotic cells - 70s (50s + 30s) ribosomes - no mitochondria - no golgi - no ER - no triglyceride fats
Bacteria Motility simple flagella
Bacteria Energy generation cytoplasmic membrane associated
Bacteria Recombination - via transformation (naked DNA), transduction (viral), conjugation (bacterial sex through DNA exhange in pili)
Stains Simple: methylene blue Differential: Gram stain Special: spore stain, acid fast
Gram negative bacteria - proteobacteria, cyanobacteria, spirochaetes, cocci, bacilli Gram pos bac: Bacillus, Staphylococcus, Streptococcus, Enterococcus,Diplococcus pneumoniae -Stains pink
Gram positive bacteria - Bacillus, Staphylococcus, Streptococcus, Enterococcus,Diplococcus pneumoniae -Stains purple
Created by: clewis3
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