Explain that prokaryotes lack a nucleus and membrane-bound organelles. Identify the cell wall, plasma membrane, cytoplasm, 70S ribosomes, naked circular DNA and plasmids, and recognise E. coli, Bacillus and Staphylococcus as bacterial examples.
Draw a labelled diagram of a prokaryotic cell.
cell wall - a uniformly thick wall;
pili - hair-like structures connected to cell wall / flagellum - at least length of the cell;
plasma/cell membrane - represented by a continuous single line; (may be labelled as the innermost wall line)
ribosomes (70S) - drawn as small discrete dots;
naked DNA/nucleoid - region with DNA not enclosed in membrane;
plasmid - circular ring of DNA;
cytoplasm - the non-structural material within the cell;
Award [2 max] if any eukaryotic structure is shown.