- 1.2 Bacteria and yeast
- Bacteria cells have a cell membrane and a cell wall which surround cytoplasm.
- Yeast is a single-celled organism.
- Bacteria are very small and can only be seen with a powerful microscope.
- When bacteria multiply they form a colony. Bacteria colonies can be seen with the naked eye.
- Bacteria do not have a nucleus so the genetic material is in the cytoplasm.
- Yeast cells have a nucleus, cytoplasm and a membrane surrounded by a cell wall.