BIO 3124 Lecture 10: MicroBio M1.2 Review
20 Dec 2018
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Describe the similarities and differences between prokaryotes and eukaryotes. Describes the different modes of locomotion used by archaea, bacteria and single cell eukaryotes. Prokaryotes often have appendages (protrusions) on their surface. Flagella and some pili are used for locomotion, fimbriae help the cell stick to a surface, and sex pili are used for dna exchange. Bacteria: flagellar & flagellation, gliding motility increase/decrease rotational speed relative to strength of proton motive force gliding: slower/smoother than swimming senses chemical gradient as it moves taxis: directed movement in response to chemical or physical gradients. Nitrogen: building blocks for proteins & nucleic acids, nitrogen fixing important to have life. Calcium and sodium: not essential for all microorganisms but still important. Iron: electron transport chain, cellular respiration, redox reactions. Describe how nutrients are transported into cells (simple transport, group translocation, abc system) Simple transport driven by the energy inherent in the proton motive force.
