Plasma Membrane: Encloses the cytoplasm.
Ribosomes: Sites for protein synthesis.
Cell Wall: Rigid structure outside the plasma membrane.
Glycocalyx: Outer coating, which may be a capsule or slime layer.
Flagella: Locomotion organelles found in some prokaryotes.
Nucleoid: Site of DNA; not membrane-bound.
Plasmids: Small, circular DNA molecules, extra-chromosomal.
Fimbriae: Attachment structures on some prokaryotes.