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Mycoplasmas are unusual bacteria because they completely lack a:

  • A cell wall
  • B nucleus
  • C ribosome
  • D cytoplasm

Correct answer: A. cell wall

Explanation: Mycoplasmas have no cell wall, the smallest living cells known.

Concept context

Whittaker's five kingdom system covering Monera, Protista, Fungi, plus viruses, viroids, and lichens. A foundational NEET chapter on how living organisms are grouped.

Read the full Biological Classification notes →