cellular membrane

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    • #1420
      taata
      Participant

      How thick is a typical cellular membrane? Express in picometres (pm),
      nanometres (nm), micrometres (μm) and millemetres (mm).

    • #26369
      victor
      Participant

      I think it’s less than 1 nm.

    • #26497
      victor
      Participant

      Hey…correction please..afeter reading my new book at last I got the answer…
      there’s differences between gram+ and gram- in the thickess of the membrane.
      gram+
      Cytoplasmic membrane: ~8 nm
      Peptidoglycane: 15-80 nm
      Variable outer membrane: ~8 nm

      while for the gram-
      Cytoplasmic membrane: ~8 nm
      Peptidoglycane: 2 nm
      Variable outer membrane: ~8 nm

      That’s what I got..hope this helps..

    • #26830
      MrMistery
      Participant

      Lolza… you where right the first time. You see, the difference between Gram+ and Gram- bacteria is not in the thickness of the cell membrane, but in the thikness of the cell wall(peptidoglycan)
      So, by your numbers, cause i do not know exactly, it is 8 nm

    • #26845
      Waters2
      Participant

      Nanometer just be right in expressing in the cell membrane because for the picometer is too small for cells and it only right for the particles and sub-particles such as atoms, protons and others.

    • #26846
      Waters2
      Participant
      quote victor:

      there’s differences between gram+ and gram- in the thickess of the membrane.
      gram+
      Cytoplasmic membrane: ~8 nm
      Peptidoglycane: 15-80 nm
      Variable outer membrane: ~8 nm

      while for the gram-
      Cytoplasmic membrane: ~8 nm
      Peptidoglycane: 2 nm
      Variable outer membrane: ~8 nm

      Actually how to differential between the gram+ and gram- ?

    • #26877
      Poison
      Participant

      What do you mean?

    • #26892
      chemistry_freako
      Participant

      Dun quite get u also, but well, thought to differentiate between Gram + and -, the easiest way would be to carry out Gram staining? Gram nagative bacteria are unable to retain the dye and thus appear pinkish under the microscope whereas gram + bacteria which are able to retain the dye, appear purpleish under the microscope =D

    • #26910
      victor
      Participant
      quote Waters2:

      Nanometer just be right in expressing in the cell membrane because for the picometer is too small for cells and it only right for the particles and sub-particles such as atoms, protons and others.

      Ummm…how about expressing it in femtometre???…(10e -15) 😆
      Perhaps gram+ can show ‘color’ when it’s dyed because of thicker peptidoglycans I think… 😕

    • #26927
      Jelanen
      Participant

      Its more because the peptidoglycans are exposed on the surface of gram+ bacteria while gram- have another phospholipid bilayer over the peptidoglycans. Since the gram stain interacts with the peptidoglycans, the gram+ stain darkly while the gram- don’t.
      -Jelanen

    • #26964
      ginny
      Participant

      the cell membrane is about 8 nm thick. 😀 did that answer your question . well keep in touch if you need any more help alright byeeeeeeeeee.

    • #27254
      Waters2
      Participant

      Sorry, actually i want to ask what is the gram+ and gram-? What is to function beside dying the bacteria?? 😕

    • #27255
      Waters2
      Participant

      victor:
      Femtometer also still too small but i cannot deny that perhaps some of the nucleus or organells(living organisms) in the world in very small size. But we see that femtometer is suitable for quarks within a proton.

      10-15 meters = 1 femtometer = one fermi
      10-15 meter, abbreviated fm and sometimes also called the Fermi in honor of Enrico Fermi.

    • #27289
      victor
      Participant

      Ow..make it in atometre then… 😆 (1 am = 10e -18.)

    • #27322
      MrMistery
      Participant

      @waters2
      The gram dye has no other function besides being a dye. It is one of the first things you do when you want to recognise a bacteria

    • #27323
      MrMistery
      Participant

      6th grade physiscs:
      multiples:
      deca, hecto, kilo, mega, giga, tera, peta, exa
      submultiples:
      deci, centi, mili, micro, nano, pico, femto, atto

      The first 3 go from 10(multiply or substract by 10) the other 1000(multiply or substract by 1000)

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