Capsule – a mucilaginous layer of slime (only certain species)., Cell wall – 10–80 nm thick, made of murein., Cell-surface membrane – controls entry/exit of substances., Plasmid – small circular piece of DNA (only certain species)., Ribosomes – smaller than in eukaryotic cells (70S)., Cytoplasm – jelly-like, contains enzymes and other soluble materials., Genetic material (DNA) – comprises a large circle of DNA., Flagellum – may be more than one; used for locomotion (only certain species)..

Prokaryotic cell - structures and functions

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