Discussion
Mycoplasmas, rickettsiae, and chlamydiae are :
Answer: B
Mycoplasmas, rickettsiae and chlamydiae are small bacteria.
All three are prokaryotes. Mycoplasmas are the smallest free-living bacteria and lack a cell wall. Rickettsiae and chlamydiae are small obligate intracellular bacteria that cannot grow outside host cells, which once led them to be confused with viruses.
They have both DNA and RNA, ribosomes and their own metabolism, and are inhibited by antibiotics such as tetracycline, so they are not viruses. They are not fungi or protozoa, both of which are eukaryotes.
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