Organismic Biology: Prokaryotes (Week 8)
Organismic Biology: Prokaryotes (Week 8) BIOL 1300 SEC003
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This 2 page Class Notes was uploaded by Michelle Sipalay on Wednesday September 28, 2016. The Class Notes belongs to BIOL 1300 SEC003 at University of Colorado Colorado Springs taught by Nicole Huber in Fall 2016. Since its upload, it has received 5 views. For similar materials see Gen Biology: Organismic Biol in Biology at University of Colorado Colorado Springs.
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Date Created: 09/28/16
9/29/16 Prokaryotes Prokaryotic Cells VS. Eukaryotic Cells Prokaryotic Cells Eukaryotic Cells - DNA in nucleoid regim - True nucleus (nuclear envelope) - No membrane bound organelles - Membrane bound organelles Mitochondria, Endoplasmic Reticulum, etc. - Ribosomes - Ribosomes - Increased surface area volume - Decreased surface area volume - Cell wall Prokaryotic Abundance 1030 - Estimated 5 x prokaryotes on Earth - We are outnumbered by prokaryotes in our own bodies Cell Surface Structure - Cell wall 2 types of cell walls (gram positive, gram negative) - Bacterial Capsule - Fimbriae - Endospore: bacteria are in a low state Motility: ability to move around - Flagella - Taxis Chemotaxis (chemical), Phototaxis (light), Aerotaxis (air) Genomic Organization - Human karyotype Bacterial Reproduction - Binary Fission Asexual, “split in half” Genetic Variation in Prokaryotes 1) Rapid Reproduction 2) Mutation 3) Genetic Recombination Genetic Recombination in Prokaryotes 1) Transformation 2) Transduction Moves bacterium DNA 3) Conjugation 9/29/16 Bacteria join together through a sex pilus F factor must be present to form sex pilus R factor
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