3.2.1.2 structure of prokaryotic cells + viruses

What type of cell is bacteria?

Prokaryote

Define prokaryotes

Very small single celled organisms with no nucleus + no membrane bound organelles in their cytoplasm

A typic prokaryotic cell will always contain?

• Cell wall → made of murein, 10 - 80nm thick

• Cell surface membrane → controls what substances leave + enter cell

• Circular DNA → free in cytoplasm + not associated with protein

• Ribosomes → 70s, where protein synthesis takes place

• Cytoplasm → jelly like, contains enzymes + other soluble materials

What are some structures that could be present in a prokaryotic cell?

• Capsule → layer of slime that surrounds cell wall

• Plasmids → small rings of DNA

• Flagellum → allows cell movement, could contain one or more

Label the diagram