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Published byDulcie Watts Modified over 9 years ago
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Bacteria
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Prokaryotes vs. Eukaryotes - “pro” = before - “karyon” = nucleus NO nucleus NO organelles Small, less complex Circular DNA, floats in cytoplasm i.e. Bacteria - “eu” = true - karyon” = nucleus Have nucleus Organelles Large, complex Linear DNA, in nucleus i.e. Plants & Animals
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2 Kingdoms of Prokaryotes
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Cyanobacteria First Photosynthetic Prokaryote Oxygen is produced in oceans and creates ozone
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3 Shapes 1. Coccus (round) 2. Bacillus (rod) 3. Spirillum (sprial) Escherichia coli Staphylococcus aureus Streptococcus pyogenes
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Gram-staining Method used to classify bacteria into 2 groups: Gram-positive vs. Gram-negative stains peptidoglycan in cell walls of the bacteria
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Endospores Specialized “resting” cells dormant cell formed by certain bacteria that can survive very harsh conditions (heat, cold, poison)
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Example – Closdridium botulinum Caused from improper canning Produces neurotoxins that lead to paralysis
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Movement Flagella – long whip- like tails pili – short projections which allow them to stick to their hosts, their environment or each other.
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Asexual ReproductionAsexual Reproduction – Binary Fission
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Methods of Obtaining Energy Photosynthesizers Chemoautotrophs Heterotrophs
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Bacteria Lab Which locations at NMHS have the most bacteria? Cell Phone Bacteria
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