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Describe - Bacterial Genome
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Describe - Bacterial Genome

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replication in bacteria, theta replication, rolling circle replication, conjugation, plasmids, transfer genetic material between bacteria

replication in bacteria, theta replication, rolling circle replication, conjugation, plasmids, transfer genetic material between bacteria

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  • 1. Describe: bacterial genome b.stev
  • 2.
    • REPLICATES before cell division:
    • two daughter cells attached > interior of cell membrane
    • membrane elongates, chromosomes move apart
    • cell doubles in size: chromosomes separate
    • the cell THEN “ pinches” inwards...
    • a new cell wall forms that separates the two new
    • cells and their chromosomal replicas
    most of the hereditary material: single long circular molecule, DNA - a variety of proteins associated this molecule is the cell’s chromosome (Barnes S. N, Curtis H, 1989)
  • 3. cell wall chromosome cell membrane theta replication growth of cell NEXT REPLICATION
  • 4. new cell wall forms REPLICATED bacterial cells (two identical daughter cells)
  • 5. This type of replication is known as: THETA REPLICATION a bi-directional motion DNA helix unwinds/ replicates / rewinds
  • 6. cell F- cell F+ bacterial chromosome F plasmid bacteria join: pili transfer of F plasmid cell F+ transfer provides: COMPLEMENTARY DNA CONJUGATION
  • 7. PLASMIDS
    • are small pockets of DNA that occur in bacteria
    • carry genetic material for a specific purpose
    • plasmids often conjugate to another bacterium
    • THIS:
    • provides the bacterium with complementary DNA
    • KNOWN AS,” rolling circle replication ”
    plasmid moves to bacterium via the use of an extension made by host [ carrier ] cell: - this extension is called: pili (Barnes S. N, Curtis H, 1989)
  • 8. Bibliography Barnes S. N, Curtis H. (1989). Biology (5th ed.) . New York: Worth Wikipedia. (2008). Bacterial conjugation – wikipedia, the free encyclopedia . Retrieved October 23, 2008, from en.wikipedia.org/wiki/Bacterial _ conjugation - 41k - The basics – replication . (n.d). Retrieved October 23, 2008, from http//:www. socrates.acadiau.ca/courses/biol/microbiology/ Replication .htm - 9k -