Multiple choice

Which of the following monerans is devoid of a cell wall?

  1. Actinomycetes

  2. Cyanobacteria

  3. Mycoplasma

  4. Bacteria
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mycoplasma are unique among monerans (bacteria) because they completely lack a cell wall. They are the smallest self-replicating organisms and have only a plasma membrane. This makes them resistant to antibiotics like penicillin that target cell wall synthesis. Actinomycetes, cyanobacteria, and regular bacteria all have cell walls.

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