Biology Forum Community General Discussion Organisms-living?or also non-living?

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    • #1614
      Miko
      Participant

      I know this sounds fairly simple . . . but are organisms living things only? Are there non-living organisms? (I really don’t remember)

      Oh! one more question . . . I understand that macromolecules are molecules that are linked together like atoms link together and form molecules, but are all organisms made of all or one of each macromolecule: carbohydrates, lipids, proteins, and nucleic acids ❓

      Thanks!

    • #28127
      victor
      Participant

      As it stated in my microbiology book, then I will say it. There are living organisms and non-living organisms.
      Living organisms: Procaryotes, Archaeans and Eukaryotes.
      Non-living organisms: Virii and Prion.

      For the 2nd question, let’s take the most simple living organism, procaryotes. We know that Procaryotes have Nucleic acid in their chromosomes, lipid bilayer as their membranes, carbohydrates as their inner substances, and proteins as the structure former (such as peptidoglycane, etc.). From the writting above, we can conclude that all living organisms are formed from those 4 organic macromolecules and don’t forget that there’re also inorganic substances which take part also…

    • #28138
      chemistry_freako
      Participant

      Yea – molecules are the ‘building blocks’ of so many things =D

    • #28141
      Dr.Stein
      Participant

      Hint: Urey/Oparin’s theory of the origin of life 😉

    • #28192
      MrMistery
      Participant

      i am sorry to dissapoint you victor but organism basically means “living thing”.
      The only organisms are Archea, Eubacteria and Eukarya
      Virii are named infectious entites, just to show that they are not living and can not be called organisms. they are considered to be at the border between living and non-living
      Prions are considered non-living because they do not have nucleic acids, they are simply proteins. therefore you can not call them living
      Cheers
      *it’s good to be back*

    • #28279
      Miko
      Participant

      Thank you all for your response. My conclusion based on the responses are: only things that are living are considered “organisms” since organism means living thing.

      I also understand that every organism consist of the four macromolecules: carbohydrates, proteins, lipids, and nucleic acids.

      Thanks . . . 😉

    • #28282
      canalon
      Participant
      quote Miko:

      I also understand that every organism consist of the four macromolecules: carbohydrates, proteins, lipids, and nucleic acids.

      I wouldn’t say that… It’s an oversimplification.
      Carbohydrates, proteins, lipids and nucleic acids are four families, classes, “whatever you want to call that” of macromolecules (which means nothing more than “big molecules”). But in each of these families there is plenty of different molecules which are all macromolecules. And all macromolecules do not necessarily belong to those 4 families…

      Cheers

      Patrick

    • #28285
      chemistry_freako
      Participant

      yea- it’s just a generalisation~ 🙂

    • #28293
      Dr.Stein
      Participant

      What about this? Living thing or organism is constructed from organic molecules including C, H, O, and N… 🙄 Awawwawaa maybe a bad idea eh? I cannot think properly today 🙁 😆

    • #28461
      victor
      Participant

      Hmm…I’ve just read the front page of biochemistry and I found that some amino acids such as cysteine makes a link with another Cysteine with a disulfide bond…..so, I think S also included in that.. 😆

    • #28465
      chemistry_freako
      Participant

      haha yea..think of rebonding when u think about cystein =)

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