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  4. An organism having cytoplasm, DNA and RNA but no cell wall is

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Q. An organism having cytoplasm, DNA and RNA but no cell wall is

Chhattisgarh PMTChhattisgarh PMT 2005

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.