Bacteria. VERY SMALL Tip of sewing needle covered in bacteria.
Bacteria Lecture ! Might as well learn about em, because you dirty kids are covered in them!
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Transcript of Bacteria Lecture ! Might as well learn about em, because you dirty kids are covered in them!
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Bacteria Lecture!Might as well learn about em, because you
dirty kids are covered in them!
![Page 2: Bacteria Lecture ! Might as well learn about em, because you dirty kids are covered in them!](https://reader035.fdocuments.us/reader035/viewer/2022070415/56649f055503460f94c1a38b/html5/thumbnails/2.jpg)
What you have to be able to do• Describe the size of bacteria• Describe where we find bacteria• Describe a couple different types of bacteria• Compare a virus to a bacteria• Compare bacteria to eukaryota
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Quick note
• Most bacteria are not harmful to humans!
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Bacteria = prokaryotes
• Prokaryote Before nucleus!• Tiny! 1000x smaller than one of your cells• Abundant in air water soil, your notebook,
Logan’s phone, Sam’s locker
http://www.youtube.com/watch?feature=endscreen&NR=1&v=JAqW4OTFB4M
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Organization of a bacteria*
• Most have cell wall surrounding membrane• Glycocalyx surrounds cell wall (it’s a
polysaccharide • Capsule vs slime layer • Fimbrae
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Binary Fission
• Technically different than mitosis • Same result!
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• Bacteria link via a sex/ conjugation pilus
• DNA passes through pilus
Conjugation
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Transformation
• Prokaryotes pick up DNA in the environment
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Bacteria types
• Gram positive – have peptidoglycan layer penicillin
works against PG layer
• Gram negative - no peptidoglycan layer
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Bacteria Types
• Spirilum
• Bacilli
• Coccus
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Biochem
• Some live only without oxygen obligate anaerobes – Tetanus botulism,
• Facultative anaerobes
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Autotrophic or heterotrophic
• Some make their food• Some do not
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Some videos!