3.2.1.2 Structure of prokaryotic cells and of viruses

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Prokaryotic cells are much smaller than eukaryotic cells. They also differ from eukaryotic cells in having: cytoplasm that lacks membrane-bound organelles smaller ribosomes no nucleus; instead they have a single circular DNA molecule that is free in the cytoplasm and is not associated with proteins a cell wall that contains murein, a glycoprotein. In addition, many prokaryotic cells have: one or more plasmids a capsule surrounding the cell one or more flagella. Details of these structural differences are not required. Viruses are acellular and non-living. The structure of virus particles to include genetic material, capsid and attachment protein.

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Prokaryotic cells are much smaller than eukaryotic cells. They also differ from eukaryotic cells in having:

cytoplasm that lacks membrane-bound organelles
smaller ribosomes
no nucleus; instead they have a single circular DNA molecule that is free in the cytoplasm and is not associated with proteins
a cell wall that contains murein, a glycoprotein.

In addition, many prokaryotic cells have:

Details of these structural differences are not required.

Viruses are acellular and non-living. The structure of virus particles to include genetic material, capsid and attachment protein.