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15 Cards in this Set

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  • Back
Prokaryote Traits
No nucleus;
No membrane enclosed organelles or internal compartments;
Small Size;
Circular Chromosomes;
Cell division via "Binary Fission";
Metabolic Diversity: some prokaryotes can perform anaerobic photosynthesis and Nitrogen Fixation;
Older and more numerous than eukaryotes
Prokaryote Shapes
Cocci: spherical;
Bacilli: rod-shaped;
Spirilla: spiral
Prokaryote Cell Walls
Make of peptidoglycan;
Reacts differently with Gram stain;
Gram(+): appear purple and have peptidoglycans;
Gram(-): appear pink and have few peptidoglycans
Prokaryote Metabolic Pathways
Obligate Anaerobes: live only in anaerobic environments (no Oxygen);
Facultative Anaerobes: can switch from aerobic to anaerobic;
Obligate Aerobes: Can live only in oxygen environments
Prokaryote Nutrional Types
Photoautotrophs: C from CO2 and E from light;
Photoheterotrophs: C from other organisms, E from light;
Chemoautotrophs: C from CO2, E from oxidizing inorganic molecules;
Chemoheterotrophs: C and E from other organic molecules;
Nitrogen Fixers
Bacteria that convert N2 to N, making it available to other organisms;
Live in close association with plant roots;
Phylogenetic Classification of Prokaryotes
based on rRNA and other molecular evidence
A prokaryotic domain which is more numerous and better known
A prokaryotic domain which is lesser known and was more recently classified
A kingdom of archaea;
heat and acid loving archaea;
oldest kingdom of archaea;
A kingdom of archaea that uses metabolic pathways to produce methane (CH4) by reducing CO2
A clade of bacteria;
Largest category and oldest group of bacteria;
A clade of bacteria;
First organisms to generate oxygen, allowing aerobic organisms to evolve;
Use same basic pathways for photosynthesis as plants;
Includes some bacteria that "fix" N2 for plants;
"Blue-green" bacteria (some form chlorophyll)
Spirochetes and Chlamydias
Infectious and parasitic clades of bacteria
Actinomycetes (actinobacteria)
Includes bacteria that cause tuberculosis and dental plaque;
Includes bacteria that produce streptomycin & other antibiotics;