Bio 113 Portfolio
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  • Prion
    • Life Cycles
    • Evolutionary History
    • Kuru
    • Sources
  • Virus
    • Life Cycles
    • Evolutionary History
    • Rabies
    • Sources
  • Bacteria
    • Life Cycles
    • Evolutionary History
    • Pseudomonas syringae
    • Borrelia burgdorferi
    • Sources
  • Archaea
    • Life Cycles
    • Evolutionary History
    • Sulpholobus acidocaldarius
    • Sources
  • Protista
    • Life Cycles
    • Evolutionary History
    • Giardia lamblia
    • Phytophthora infestans
    • Hexacontium enthacanthum
    • Corallina officinalis
    • Discostelium discoideum
    • Sources
  • Plantae
    • Life Cycles
    • Evolutionary History
    • Dicranum polysetum
    • Adiantum aleuticum
    • Ginkgo biloba
    • Pyrus communis
    • Magnolia virginiana
    • Sources
  • Fungi
    • Life Cycles
    • Evolutionary History
    • Lentinula edodes
    • Neurospora crassa
    • Gigaspora gigantea
    • Rhizopus stolonifer
    • Batrachochytrium dendrobatidis
    • Sources
  • Animalia
    • Life Cycles
    • Evolutionary History
    • Euplectella aspergillum
    • Lingula anatina
    • Priapulus caudatus
    • Mellita quinquiesperforata
    • Tachyglossus aculeatus
    • Sources

Life Cycles

Bacteria reproduce by binary fission and go through a growth cycle with 4 phases.

pic (15)

Picture
Binary Fission: (16)
  1. Cell copies its DNA and separates the 2 copies to either side of the cell
  2. Many cell division proteins including FtsZ gather at the future division site
  3. FtsZ forms a ring-like structure at division site
  4. Division occurs and cell is cleaved in two, new cell wall is synthesized at split site

Growth Cycle: (15)
  1. Lag phase- cells adjust to new environment
  2. Exponential (log) phase- cells start dividing rapidly by binary fission
  3. Stationary phase- growth becomes limited due to lack of nutrients, build up of metabolites or lack of space. cells stop dividing
  4. Death phase- cells eventually lose ability to divide and die
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