Do prokaryotic cells have a cytoskeleton?

Answer 1

It used to be thought that prokaryotes do not have a cytoskeleton, but better imaging techniques since the 1990s have shown cytoskeletal elements in bacteria and archaea.

In addition to components homologous to eukaryotic cytoskeletal proteins (tubulin, actin, and intermediate filaments), bacterial cytoskeletal proteins also comprise a type exclusive to bacteria.

The Bacterial Cytoskeleton by Shih, Y.-L. and Rothfield, L. (2006) is available at https://tutor.hix.ai Microbiology and Molecular Biology Reviews, 70(3), 729–754.

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Answer 2

Michael Adams

Prokaryotic cells do, in fact, have a cytoskeleton, albeit a simpler one than that of eukaryotic cells; it is primarily composed of protein filaments such as MreB, CreS, and FtsZ, which are involved in intracellular organization, cell division, and shape maintenance.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.