Which one of the following statements about mycoplasma is wrong?
Correct answer: B. They are sensitive to penicillin.
- A. They are pleomorphic.
- B. They are sensitive to penicillin.
- C. They cause diseases in plants.
- D. They are also called PPLO.
Explanation
All options are explained below: a)They are pleomorphic: This statement is correct. Mycoplasma is known for its pleomorphic nature, meaning it can have various shapes and sizes. b) They are sensitive to penicillin: This statement is incorrect. Mycoplasma is typically resistant to antibiotics like penicillin because they lack a cell wall, which is the target of penicillin. Penicillin primarily acts on bacteria with cell walls, making it ineffective against mycoplasma. c) They cause diseases in plants:This statement is correct. Mycoplasma can indeed infect plants and cause diseases, often referred to as "phytoplasmas." These phytoplasmas are plant pathogens that are related to mycoplasma. d) They are also called PPLO (Pleuropneumonia-like organisms):This statement is correct. Mycoplasma was formerly referred to as Pleuropneumonia-like organisms (PPLO). The name was changed to reflect the unique characteristics of these microorganisms. Correct option: B. They are sensitive to penicillin. Summary: The incorrect statement is that mycoplasma is sensitive to penicillin. In reality, mycoplasma is generally resistant to penicillin and other antibiotics that target bacterial cell walls. Mycoplasma is pleomorphic, can infect both animals and plants, and was historically known as PPLO.
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