Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2005

  • question_answer
    An organism having cytoplasm, DNA and RNA but no cell wall is

    A)  cyano bacterium            

    B)  mycoplasma

    C)  bacterium                         

    D)  virus

    Correct Answer: B

    Solution :

    Mycoplasmas are bacteria that do not form cell walls. Because they lack cell walls, they are highly pleomorphic. They can produce filaments that resemble fungi; hence, their name. Mycoplasma cells are very small, ranging in size from 0.1 to 0.25 urn. Mycoplasma can be grown as artificial media that provide them sterols (if necessary) and other   special   nutritional   or   physical requirements.


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