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Thread: Salmonella typhimurium..

  1. #1 Salmonella typhimurium.. 
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    Another simple question in this book has boggled thy brain...multiple choice and the question is "salmonella typhimurium, being a bacterium, would have a cell wall, contain mitochondria, reproduce asexually only?"

    the answer is have a cell wall (it's multiple choice so only one can be chosen) but don't bacteria only reproduce asexually being prokaryote??


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  3. #2  
    Forum Ph.D. Heinsbergrelatz's Avatar
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    i think it can produce sexually, but we dont call it sexual we rather refer or scientifically call it "bacterial conjugation" now sex here refers to the characterized process that pass a combination of genetic material to offspring. now asexual, there is no genetic change, they just split themselves e.g. binary fission. so the offspring will be identical to the parental genotype or the identical genetic structure.

    what is this conjugation? well its basically when two bacteria form this "mating bridge" where they exchange DNA (their genes) across the bridge. The outcome of bacterial sex (or conjugation) is the fact that the outcome is very different to the original and therefore has a different genetic make up.


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  4. #3  
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    Ah thanks for the reply =)

    but what bugs me is it says "reproduce"....would conjugation really constitute reproduction when no new cells are formed?
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  5. #4  
    Forum Cosmic Wizard i_feel_tiredsleepy's Avatar
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    No new cell is formed but a genetically distinct individual is formed.

    Whether you want to call conjugation reproduction is just semantics anyway. It's completely irrelevant.

    If this was a question on a test I would say the answer was ambiguous unless the teacher explicitly defined conjugation as sexual reproduction in class.
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  6. #5  
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    Ambiguous question! S. Typhimurium replicates asexually by binary fission. Bacterial conjugation is not technically reproductive, it is horizontal gene transfer.
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