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antibiotices

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  • antibiotices

    A)why grame-negative bacteria more resistant than grame-positive to antibiotices
    B)What the differance between bacteriostatic and bacteriocidal antibiotices
    C)penicillin function as antibiotices mainly by inhibiting the ability of bacteria to
    1-form spores
    2-replicat DNA
    3-synthesize normal cell wall
    4-produce functional ribosomes
    D)the best antibiotices used for treatment urinary tract infection is
    1-penicillin
    2-gentamycin
    3-vancomycin
    4-Nalidixic acid
    E)Amphotericin B are
    1-bacteriostatic antibiotices
    2-antifungal antibiotices
    3-bacteriocidal antibiotices

    هذة اسئلة بسيطة اخترتها للتنشيط والمراجعةلنفيدكم ولنستفيدمنكم احبتى.
    ولكم منى خالص الحب
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  • #2
    A)why grame-negative bacteria more resistant than grame-positive to antibiotices
    In Gram-negative bacteria the cell wall is surrounded by an extra layer made of
    polysaccharides, proteins, and phospholipids. This layer, though easily washed away
    by alcohol-acetone mixtures, blocks many antibiotics from reaching the peptidoglycan cell wall
    . Since b-lactam antibiotics like penicillin work by attacking the cell wall,
    this outer layer makes Gram-negative bacteria resistant to such antibiotics

    B)What the differance between bacteriostatic and bacteriocidal antibiotices
    Bacteriostatic antibiotics inhibit growth and reproduction of bacteria without killing them;
    killing is done by bactericidal agents.
    Bacteriostatic agents must work with the immune system to remove the microorganisms from the body.
    However, there is not always a precise distinction between them and bactericides;
    high concentrations of some bacteriostatic agents are also bactericidal,
    whereas low concentrations of some bacteriocidal agents are bacteriostatic.

    C)penicillin function as antibiotices mainly by inhibiting the ability of bacteria to
    3-synthesize normal cell wall

    D)the best antibiotices used for treatment urinary tract infection is
    Nalidixic acid

    E)Amphotericin B are
    antifungal antibiotices

    ياريت استاذ عونى تحكيلي اجوبتي صح ولا غلط
    خاصة اول سؤالين
    ويعطيك العافية
    http://www13.0zz0.com/2009/11/14/15/878580194.jpg

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    • #3
      المشاركة الأصلية بواسطة عاشقة الورد مشاهدة المشاركة
      A)why grame-negative bacteria more resistant than grame-positive to antibiotices
      In Gram-negative bacteria the cell wall is surrounded by an extra layer made of
      polysaccharides, proteins, and phospholipids. This layer, though easily washed away
      by alcohol-acetone mixtures, blocks many antibiotics from reaching the peptidoglycan cell wall
      . Since b-lactam antibiotics like penicillin work by attacking the cell wall,
      this outer layer makes Gram-negative bacteria resistant to such antibiotics

      B)What the differance between bacteriostatic and bacteriocidal antibiotices
      Bacteriostatic antibiotics inhibit growth and reproduction of bacteria without killing them;
      killing is done by bactericidal agents.
      Bacteriostatic agents must work with the immune system to remove the microorganisms from the body.
      However, there is not always a precise distinction between them and bactericides;
      high concentrations of some bacteriostatic agents are also bactericidal,
      whereas low concentrations of some bacteriocidal agents are bacteriostatic.

      C)penicillin function as antibiotices mainly by inhibiting the ability of bacteria to
      3-synthesize normal cell wall

      D)the best antibiotices used for treatment urinary tract infection is
      Nalidixic acid

      E)Amphotericin B are
      antifungal antibiotices
      ياريت استاذ عونى تحكيلي اجوبتي صح ولا غلط
      خاصة اول سؤالين
      ويعطيك العافية


      يعطيك ربى العافية


      ويجزيك كل الخير


      ساقول ولكن غدا ان شاء الله


      خلينا نشوف اخوة وهم يقولوا رايهم بالاجابة

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      • #4
        دوبي انتبهت للاسئلة
        A/ due to the presence of techoic acid & less amount of peptidoglycan which are the antiboitics focus onit
        B/bacteriocidal means killing effect while bacteriostatic means inhibit the growth without killing
        C/3333333333333333333333333333
        D/4444444444444444444444444444
        E/22222222222222222222222222222

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        • #5
          ياريت استاذ عونى تحكيلي اجوبتي صح ولا غلط
          خاصة اول سؤالين
          ويعطيك العافية



          لا تعليق عاشقة الورد


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          • #6
            المشاركة الأصلية بواسطة m^rm^r مشاهدة المشاركة
            دوبي انتبهت للاسئلة
            المشاركة الأصلية بواسطة m^rm^r مشاهدة المشاركة
            A/ due to the presence of techoic acid & less amount of peptidoglycan which are the antiboitics focus onit
            B/bacteriocidal means killing effect while bacteriostatic means inhibit the growth without killing
            C/3333333333333333333333333333
            D/4444444444444444444444444444
            E/22222222222222222222222222222


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