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  • ICAR and TNAU E-Course Summarized

    Summarized Notes
  • Cell wall lack microorganism

    Question: Cell wall lack microorganism

    Options:

    Bacteria
    Virus
    Fungi
    MLO

    ✅ Explanation: MLOs are unique among microorganisms as they lack a cell wall. This characteristic distinguishes them from bacteria, fungi, and most other cellular organisms. The absence of a cell wall contributes to their pleomorphic nature.

    🔑Key Points:
    -The cell is the structural & functional unit of life.
    -Based on the presence or absence of nuclear membrane cells can categorize as prokaryotic & eukaryotic cells.
    -Prokaryotic Cell –
    -The cells having nuclear material without a nuclear membrane are termed prokaryotic cells.
    -The organisms with these kinds of cells are called prokaryotes (pro: primitive; karyon: nucleus).
    -Examples of prokaryotes are bacteria and blue-green algae. 
    -Eukaryotic cell – 
    -The cells having a well-organized nucleus with a nuclear membrane are designated as eukaryotic cells.
    -All organisms other than bacteria and blue-green algae are called eukaryotes. (eu : true; karyon: nucleus).
    -The Mycoplasm are organisms that completely lack a cell wall.
    -They are the smallest living cells known and can survive without oxygen.
    -Many mycoplasmas are pathogenic in animals and plants.
    Therefore, Mycoplasmas are different from the other prokaryotes by the absence of the cell wall itself.
    Additional Information
    -The cell wall of fungi is composed of Chitin and Polysaccharides.
    -In Euglenoids instead of a cell wall, they have a protein-rich layer called a pellicle.
    -Algae have a cell wall, made of cellulose, Galatians, mannans, and minerals like calcium carbonate.

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